Volume 108, Issues 9 - 12 September 2023 | | Advertisement | PRB seeks an Associate Editor to manage the peer review process of assigned manuscripts by determining whether to send a manuscript out for external review, choosing appropriate reviewers, and making decisions on rejection or acceptance. More information. | | | | |
Advertisement  | Do you need language assistance for your next submission? Take advantage of new translation, figure assistance, and text editing services provided by APS and Editage. Experience exceptional support, expertise, and dedication for all your publishing needs. Get a quote. | | | | | | Advertisement | The abstract submission deadline is quickly approaching! Don't miss this opportunity to showcase your work to a global audience of physicists, scientists, and students representing 32 APS Units and Committees and explore groundbreaking research from industry, academia, and major labs. Submit your abstract by October 20. | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Randall D. Kamien Phys. Rev. B 108, 090001 (2023) – Published 25 September 2023 | | | Editors' Suggestion Adithya Sriram, Tibor Rakovszky, Vedika Khemani, and Matteo Ippoliti Phys. Rev. B 108, 094304 (2023) – Published 15 September 2023  | Even in the absence of unitary evolution, measurements alone can induce a rich variety of dynamical phases and phenomena in many-body quantum systems. Inspired by the Kitaev honeycomb Hamiltonian, a paradigmatic model of topological physics, the authors construct here a stochastic measurement-only dynamics on a honeycomb lattice and show that it hosts distinct entanglement phases, including phases that protect topological qubits for an exponential amount of time and a critical phase with exotic dynamical scaling. | | | | | | Editors' Suggestion R. Haller, M. Osterwalder, G. Fülöp, J. Ridderbos, M. Jung, and C. Schönenberger Phys. Rev. B 108, 094514 (2023) – Published 19 September 2023  | Experimental signatures of topological superconductivity have been notoriously difficult to verify, even though they are actively being researched. Here, the authors use nanowires of Cd3As2 – a Dirac semimetal – to hunt for these signatures by simultaneously looking at Josephson radiation and Shapiro patterns at different doping levels. By cross-checking the experimental results with an extensive (RCSJ) model that includes thermal noise, it is concluded that trivial supercurrent dominates and that topological supercurrent, if existent, falls below the detection limit of the setup. | | | | | | Editors' Suggestion Grgur Palle, Clifford Hicks, Roser Valentí, Zhenhai Hu, You-Sheng Li, Andreas Rost, Michael Nicklas, Andrew P. Mackenzie, and Jörg Schmalian Phys. Rev. B 108, 094516 (2023) – Published 26 September 2023  | In the longstanding quest to determine the symmetry of the superconducting state of Sr2RuO4, this paper exploits recent elastocaloric experiments to narrow down the possibilities down to a handful of options. By analyzing the elastocaloric data, the authors show that a normal-state maximum in the entropy becomes a minimum in the superconducting state. Through modeling of the associated Lifshitz transition, they extract information about the momentum-space structure of the pairing gap function, yielding constraints on the viable pairing states. | | | | | | Editors' Suggestion Adam Nahum and Kay Jörg Wiese Phys. Rev. B 108, 104203 (2023) – Published 12 September 2023  | Field theoretic renormalization group is applied to measurement and entanglement phase transitions. The renormalization group flows for both random tensor networks and monitored systems show that, in high dimensions, there exist distinct weak- and strong-coupling universality classes for these phase transitions. In addition, one of the field theories exhibits a supersymmetry that leads to dimensional reduction by four. | | | | | | Editors' Suggestion Tanmay Bhore, Jean-Yves Desaules, and Zlatko Papić Phys. Rev. B 108, 104317 (2023) – Published 26 September 2023  | Generic quantum systems thermalize as entanglement builds up between a subsystem and its complement. Performing measurements on a complementary subsystem, however, can reveal finer nuances in the system's ability to thermalize. The authors show here that systems that look 'thermal' under the lens of the Eigenstate Thermalization Hypothesis (ETH) can be highly 'nonthermal' when probed deeper. They illustrate this finding on several constrained models that describe slow relaxation in quantum glasses and quantum many-body scars in Rydberg atom arrays. | | | | | | Editors' Suggestion A. Scheie, Pyeongjae Park, J. W. Villanova, G. E. Granroth, C. L. Sarkis, Hao Zhang, M. B. Stone, Je-Geun Park, S. Okamoto, T. Berlijn, and D. A. Tennant Phys. Rev. B 108, 104402 (2023) – Published 1 September 2023  | Magnetic van der Waals materials have many proposed technological uses, but predicting their behavior requires understanding their magnetic interactions. Here, the authors present a comprehensive study of the spin exchange Hamiltonian of semiconducting magnet NiPS3. Using inelastic neutron scattering and first-principles density functional theory calculations, the authors derive a spin-exchange Hamiltonian able to explain spin excitations observed with other probes. Comparing semiclassical simulations against the experimental neutron spectrum reveals an anomalous suppression of low-energy magnetism in NiPS3, signaling nontrivial physics lurking in its ground state. | | | | | | Editors' Suggestion Dávid Hovančík, Marie Kratochvílová, Tetiana Haidamak, Petr Doležal, Karel Carva, Anežka Bendová, Jan Prokleška, Petr Proschek, Martin Míšek, Denis I. Gorbunov, Jan Kotek, Vladimír Sechovský, and Jiří Pospíšil Phys. Rev. B 108, 104416 (2023) – Published 21 September 2023  | Here, the authors report strongly anisotropic uniaxial antiferromagnetism in the van der Waals trihalide VBr3, with a tricritical point in the H-T phase diagram in out-of-plane field. The robustness of the antiferromagnetic state manifested by a high critical metamagnetic field is explained by ab initio calculations that predict a zigzag antiferromagnetic order of V moments described within the J1-J2-J3 model. The observed saturated moment of 1.2 μB/f.u. indicates a significant vanadium orbital moment that is the main ingredient of the strong anisotropy. | | | | | | Editors' Suggestion R. D. Dawson, X. Shi, K. S. Rabinovich, D. Putzky, Y.-L. Mathis, G. Christiani, G. Logvenov, B. Keimer, and A. V. Boris Phys. Rev. B 108, 104501 (2023) – Published 5 September 2023  | The authors have combined several complementary spectroscopic methods to achieve high-precision control over the superconductivity-induced spectral weight transfer in a DyBa2Cu3O7 film with a superconducting Tc of 90 K, spanning an energy range over three orders of magnitude from ~1 meV to 1 eV. They find that the Ferrell-Glover-Tinkham sum rule is satisfied within an unprecedented accuracy of 2% by integrating the optical conductivity up to 0.6 eV, consistent with the spectral range of antiferromagnetic spin fluctuations. | | | | | | Randall D. Kamien Phys. Rev. B 108, 110001 (2023) – Published 25 September 2023 | | | Editors' Suggestion Andreas Rückriegel, Jonas Arnold, Rüdiger Krämer, and Peter Kopietz Phys. Rev. B 108, 115104 (2023) – Published 5 September 2023  | The authors show here that exact functional renormalization group flow (FRG) equations for quantum systems can be derived directly within an operator formalism without using functional integrals. This simple insight opens new possibilities for applying FRG methods to models for strongly correlated electrons with projected Hilbert spaces, such as quantum spin models, the t-J model, or the Hubbard model at infinite on-site repulsion. By representing these models in terms of Hubbard X-operators, various applications of this approach are explored. | | | | | | Editors' Suggestion F. Aryasetiawan Phys. Rev. B 108, 115110 (2023) – Published 6 September 2023  | A continuity equation determining the total spectral function of a many-electron system is derived within the recently proposed exchange-correlation field framework. A practical scheme is constructed in which only the diagonal part of the exchange-correlation field is needed as input, leading to an explicit formula for the spectral function. This will greatly simplify calculations of spectral functions provided a reliable approximation for the exchange-correlation field is available. The local-density approximation could be a suitable starting point for an accurate approximation. | | | | | | Editors' Suggestion Ali Lavasani, Zhu-Xi Luo, and Sagar Vijay Phys. Rev. B 108, 115135 (2023) – Published 15 September 2023  | The authors study the quantum dynamics of a (2+1)D monitored random circuit involving local projective measurements, inspired by the physics of the Kitaev quantum spin liquid. A Majorana parton description of the dynamics reveals a close connection between the entanglement dynamics of quantum trajectories and the 3D classical fully packed loop model. The authors uncover a critical phase where quantum trajectories exhibit long-range entanglement with a logarithmic (L log L) violation of the area law, and a topologically ordered phase reminiscent of the toric code phase. | | | | | | Editors' Suggestion Jonas Schwab, Francesco Parisen Toldin, and Fakher F. Assaad Phys. Rev. B 108, 115151 (2023) – Published 25 September 2023  | Spin systems are a fundamental concept in condensed matter and statistical physics. Here, the authors provide the very first computation of the spin-S SU(N) antiferromagnet in a representation amenable to negative sign free fermion Monte Carlo simulations. They offer a numerical proof of the seminal works of Read and Sachdev. It highlights the close connection between topology and the melting of the quantum antiferromagnet, with the Berry phase explaining the various states observed in the vicinity of the quantum antiferromagnet. | | | | | | Editors' Suggestion A. A. Gunyaga, M. V. Durnev, and S. A. Tarasenko Phys. Rev. B 108, 115402 (2023) – Published 5 September 2023  | Structured light, ranging from intensity or polarization gratings to beams with fully controlled spatiotemporal structure, has great potential for use in optics and optoelectronics. This paper explores the photoresponse of a two-dimensional electron system to structured terahertz radiation and uncovers photocurrents related to the gradients of radiation intensity, polarization, and phase. The theory is applied to study the radial and azimuthal currents induced by twisted light beams carrying orbital angular momentum. | | | | | | Editors' Suggestion Yi-Xin Xiao, Jing Hu, Zhao-Qing Zhang, and C. T. Chan Phys. Rev. B 108, 115427 (2023) – Published 19 September 2023  | This work establishes clear relationships between how exceptional points of varying orders split and which parts of the system are perturbed. Additionally, two topological invariants are identified to fully characterize the various splitting behavior. These findings provide a comprehensive understanding of how exceptional points split in various non-Hermitian systems, and can help optimize the performance of sensors that rely on exceptional points. | | | | | | Editors' Suggestion Hyeongmuk Lim, Sunje Kim, and Bohm-Jung Yang Phys. Rev. B 108, 125101 (2023) – Published 1 September 2023  | While stable and fragile topological insulators (TIs) are blind to unoccupied states, defining a delicate TI depends critically on the conduction band. Here, the authors report a new delicate TI, dubbed a "real Hopf insulator" (RHI), in a spinless PT-symmetric fermion system in three dimensions. Having two topological invariants characterizing both conduction and valence bands, the RHI features a bulk-boundary correspondence and reverting Thouless pump that must be described by using both bands simultaneously. This sheds light on the generic properties of delicate TIs. | | | | | | Editors' Suggestion Jonah B. Haber, Diana Y. Qiu, Felipe H. da Jornada, and Jeffrey B. Neaton Phys. Rev. B 108, 125118 (2023) – Published 13 September 2023  | Over 25 years ago, Marzari and Vanderbilt introduced maximally localized Wannier functions (MLWFs), the most compact real-space representation of electronic wavefunctions in solids. Here, the authors put forward a generalization of this scheme for excitons, correlated electron-hole pairs that dictate the optical properties of materials. Much as MLWFs have transformed our understanding of electrons in solids, from chemical bonding to polarization to topology, these maximally localized exciton Wannier functions should deepen our understanding of photophysical and excited-state phenomena of materials. | | | | | | Editors' Suggestion P. Warzanowski, M. Magnaterra, P. Stein, G. Schlicht, Q. Faure, Ch. J. Sahle, T. Lorenz, P. Becker, L. Bohatý, M. Moretti Sala, G. Monaco, P. H. M. van Loosdrecht, and M. Grüninger Phys. Rev. B 108, 125120 (2023) – Published 14 September 2023  | The cubic halides K2OsCl6, K2OsBr6, and Rb2OsBr6 are found to be excellent realizations of spin-orbit-entangled nonmagnetic J=0 compounds in the intermediate coupling regime. The two complementary techniques of resonant inelastic x-ray scattering and optical spectroscopy allow the authors to draw a comprehensive picture of the electronic excitations and to assess the electronic structure. The accurate set of electronic parameters such as spin-orbit coupling, Hund's coupling, crystal-field splitting, Mott gap, and charge-transfer energy will serve as a solid reference for future studies on Os compounds. | | | | | | Editors' Suggestion Wanda Hou and Yi-Zhuang You Phys. Rev. B 108, 125130 (2023) – Published 20 September 2023  | This paper investigates the symmetric mass generation transition in a bilayer honeycomb lattice model using variational Monte Carlo simulations. By measuring the fermion scaling dimension at the critical point, the authors provide evidence for fermion fractionalization into deconfined emergent particles, supporting the hypothesis that the transition is a fermionic deconfined quantum critical point. The numerical results, including the critical exponent and fermion dimension, agree with theoretical predictions. | | | | | | Editors' Suggestion Pavel Sterin, Kai Hühn, Mikhail M. Glazov, Jens Hübner, and Michael Oestreich Phys. Rev. B 108, 125301 (2023) – Published 8 September 2023  | Spin noise spectroscopy on single quantum dots (QDs) has matured to a highly efficient method to study the spin and charge dynamics of semiconductor quantum dots, including the subtle impact of their surroundings. Here, the authors extend the theory and the experimental technique of optical spin noise spectroscopy to high magnetic fields and study the fundamental mechanisms of decharging and recharging of (InGa)As QDs at quasiresonant and nonresonant optical excitation. The resulting photoinduced two-way charge dynamics in single QDs is not only interesting from the fundamental point of view but plays an important role in many quantum dot based photonic devices, such as optically addressable qubits or reliable single-photon emitters. | | | | | | Editors' Suggestion O. E. Raichev Phys. Rev. B 108, 125305 (2023) – Published 15 September 2023  | In the hydrodynamic regime of electron transport, the distribution of electrical currents and potentials inside a conductor are determined by the Navier-Stokes equation with boundary conditions. The derivation of the boundary conditions from kinetic theory includes both an approximate approach, expressing them through the electronic viscosity, and a more accurate approach, implying numerical solution of the Boltzmann equation. With magnetic field, the results of the two approaches are considerably different when the mean free path length determined by electron-electron collisions is comparable to the cyclotron radius. | | | | | | Editors' Suggestion Antonio Tiene, Brendan C. Mulkerin, Jesper Levinsen, Meera M. Parish, and Francesca Maria Marchetti Phys. Rev. B 108, 125406 (2023) – Published 6 September 2023  | Should the optical response of doped two-dimensional semiconductors be described within a Fermi polaron or a trion model? Using a finite-temperature Fermi polaron theory, the authors demonstrate here a crossover from a quantum degenerate regime with a well-defined polaron quasiparticle to an incoherent regime at high temperature or low doping, where the lowest-energy attractive polaron becomes subsumed into a broad trion-hole continuum. The crossover is accompanied by a characteristic evolution of the emission profile, from a symmetric Lorentzian to an asymmetric peak. | | | | | | Editors' Suggestion Paul Henderson, Areg Ghazaryan, Alexander A. Zibrov, Andrea F. Young, and Maksym Serbyn Phys. Rev. B 108, 125411 (2023) – Published 11 September 2023  | Harnessing the power of deep learning, researchers have developed a novel method to fit the band structure parameters of complex 2D materials, such as trilayer graphene. By training neural networks on simulated data for the density of states, and then minimizing the effective distance between network-generated images and experimental data, the authors obtain here accurate predictions of tight-binding parameters, validating their results against literature values. This method can be easily extended to other complex two-dimensional materials, as well as to other experimental techniques. | | | | | | Editors' Suggestion Benjamin Rousseaux, Yanko Todorov, Angela Vasanelli, and Carlo Sirtori Phys. Rev. B 108, 125417 (2023) – Published 14 September 2023  | Unlocking the full potential of nanophotonic devices involves the engineering of their intrinsic optical properties. Here, the authors investigate a quantum theory that treats the interaction between quantum-confined plasmons and optical phonons in semiconductors. This theory allows computation of the optical response beyond the conventional Drude-Lorentz model. In particular, it predicts new effects, such as an oscillator-strength transfer mechanism between phonons and dark plasmon modes. | | | | | | Editors' Suggestion Letter Wenxuan Zhu, Cheng Song, Lei Han, Hua Bai, Chong Chen, and Feng Pan Phys. Rev. B 108, L100406 (2023) – Published 26 September 2023  | The authors experimentally show here that the Curie temperature of van der Waals CrPS4 is elevated from 40 K up to room temperature by the interfacial effect from graphene. The compatible Fermi level between CrPS4 and graphene enables sufficient interfacial charge transfer across their atomically fine interface, leading to promoted exchange coupling and higher Curie temperature of CrPS4 without the participation of strong spin-orbit coupling. The enhanced magnetism of CrPS4 further induces room-temperature exchange splitting in graphene by the magnetic proximity effect. | | | | | | Editors' Suggestion Letter Andrew C. Yuan, Yaar Vituri, Erez Berg, Boris Spivak, and Steven A. Kivelson Phys. Rev. B 108, L100505 (2023) – Published 12 September 2023  | The lowest-order Josephson coupling between d-wave superconductors vanishes by symmetry when the twist angle is close to 45 degrees. The authors propose here an "order by disorder" mechanism, whereby spatial fluctuations in the local Josephson coupling generate an effective higher-order coupling, leading to a time reversal symmetry breaking superconducting phase at the twisted interface. This mechanism may offer an explanation for recent experiments in twist junctions between high-Tc cuprate superconductors. These findings have broader implications for high-Tc cuprate physics, requiring a local admixture of an s-wave component in the d-wave order parameter. | | | | | | Editors' Suggestion Letter Claudio Guarcello, Alessandro Braggio, Francesco Giazotto, and Roberta Citro Phys. Rev. B 108, L100511 (2023) – Published 29 September 2023  | The authors suggest here how to unveil the symmetry of the order parameter in iron-based superconductors (FeSCs) via thermoelectricity: in the quest to unveil their specific symmetry, a groundbreaking avenue emerges. Harnessing the power of linear thermoelectric effects in low-temperature tunnel junctions with FeSCs, a novel window into the world of superconducting order parameters is opened. Dive into the realm of unconventional coupling states and discover how thermoelectric measurements can unlock the hidden complexities of Fe-based systems, with implications spanning from quantum technologies to energy harvesting. Explore the untapped potential of thermoelectricity in deciphering the puzzles of quantum materials. | | | | | | Editors' Suggestion Letter Manuel Katzer, Malte Selig, Lukas Sigl, Mirco Troue, Johannes Figueiredo, Jonas Kiemle, Florian Sigger, Ursula Wurstbauer, Alexander W. Holleitner, and Andreas Knorr Phys. Rev. B 108, L121102 (2023) – Published 5 September 2023  | Semiconductor excitons are composite particles consisting of fermionic carriers. Nevertheless they are considered as paradigmatic candidates for bosonic condensation and the formation of macroscopic coherence in solids. To address both effects, the kinetics of exciton thermalization is studied, including their composite fermionic character. This way, exciton condensation based on the primary assumption of a bosonic thermalization is questioned. In this light, also discussed is whether a recently observed decrease of linewidths at increasing exciton density can be related to a signature for emerging excitonic coherence. | | | | | | Editors' Suggestion Letter Qing-Rui Wang, Yang Qi, Chen Fang, Meng Cheng, and Zheng-Cheng Gu Phys. Rev. B 108, L121104 (2023) – Published 6 September 2023  | Topological insulators in two-dimensional systems are well-understood within the context of free-fermion systems. Nevertheless, comprehending their strongly interacting counterparts presents a significant challenge. Here, the authors developed an innovative lattice model based on U(1)f fermionic charge decorations. The model furnishes a rigorous mathematical framework for delving into fermionic symmetry-protected topological phases that conserve U(1)f charge, among other types of symmetries. Notably, this research expands the existing theoretical landscape by presenting an exactly solvable Hamiltonian with a finite local Hilbert space and a sophisticated classification scheme for continuous symmetries. | | | | | | Editors' Suggestion Letter B. Geldiyev, M. Ünzelmann, P. Eck, T. Kißlinger, J. Schusser, T. Figgemeier, P. Kagerer, N. Tezak, M. Krivenkov, A. Varykhalov, A. Fedorov, L. Nicolaï, J. Minár, K. Miyamoto, T. Okuda, K. Shimada, D. Di Sante, G. Sangiovanni, L. Hammer, M. A. Schneider, H. Bentmann, and F. Reinert Phys. Rev. B 108, L121107 (2023) – Published 14 September 2023  | The orbital Rashba effect describes the formation of chiral orbital angular momentum textures upon inversion symmetry breaking at surfaces or interfaces. Here, the authors unveil a pronounced anisotropic spin-orbit splitting with a Rashba-type spin polarization in the electronic interface states in the model system Te/Au(100). Exploring the momentum-dependent response of inversion symmetry breaking, they particularly demonstrate that the orbital texture leads to a strongly anisotropic spin and orbital Rashba effect. These findings will provide a valuable contribution to the discovery and understanding of future "orbitronic" phenomena. | | | | | | Editors' Suggestion Letter Constantine Yannouleas and Uzi Landman Phys. Rev. B 108, L121411 (2023) – Published 26 September 2023  | Quantum Wigner molecules (WMs) in strongly interacting few-body fermionic moiré quantum dots in twisted bilayers of transition metal dichalcogenide (TMD) materials are uncovered via full configuration interaction calculations, going beyond the Aufbau principle of natural atoms and Hubbard modeling. Nested polygonal sliding rings of localized fermions, hidden in the exact particle densities, are revealed through wavefunction correlation analysis [see (3,9) and (1,6,10) electron WMs in 2D semiconductors], broadening the WM portfolio to include the TMD trilobal symmetry as an added resource in twistronics, and providing benchmarks for AI-based many-body computations. | | | | | | | |
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