| Volume 106, Issues 17 - 20 November 2022 | | Advertisement | APS is pleased to announce the launch of the newest Physical Review title, PRX Life, a high impact, fully open access journal dedicated to publishing outstanding research at all scales of biological organization. As the first interdisciplinary journal focused exclusively on quantitative biological research, PRX Life aims to catalyze discoveries that advance our understanding of living systems by publishing research articles, perspectives, reviews, and tutorials by and for scientists working at the interface of physics and biology. Learn more and sign up for alerts » | | | | |
Advertisement | Early bird registration is officially open for March Meeting 2023–one of the largest and most exciting conferences in physics! Witness groundbreaking physics research, network with potential employers, and prepare for career success at March Meeting 2023. Register today » | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Editors' Suggestion Seth Root, Chad A. McCoy, Kyle R. Cochrane, John H. Carpenter, Raymond W. Lemke, Luke Shulenburger, Thomas R. Mattsson, and Philip A. Sterne Phys. Rev. B 106, 174114 (2022) – Published 30 November 2022  | Cryogenic liquid noble gases, because of their noble nature and monatomic fluid behavior, are ideal for comparing experiments and theory at high pressures and temperatures. Using both magnetically accelerated flyer plates and laser-driven decaying shocks, the authors obtain here high-precision measurements on shock-compressed liquid argon to 1 TPa. The data are used to calibrate two different EOS models. The results show that even if two models are calibrated to the same data set, they can exhibit different responses at extreme conditions. | | | | | | Editors' Suggestion Haifeng Lang, Philipp Hauke, Johannes Knolle, Fabian Grusdt, and Jad C. Halimeh Phys. Rev. B 106, 174305 (2022) – Published 18 November 2022  | A paradigm of strong ergodicity breaking – disorder-free localization (DFL) – offers a fundamental probe of out-of-equilibrium quantum many-body physics and also promises potential applications in quantum information technology. As such, stabilizing DFL against errors on modern quantum simulators becomes of paramount importance. Here, the authors introduce the concept of Stark gauge protection, which comprises an experimentally friendly sum of local symmetry generators each weighted by its spatial location. This stabilizes DFL up to all investigated evolution times. | | | | | | Editors' Suggestion Jinsoo Park, Yao Luo, Jin-Jian Zhou, and Marco Bernardi Phys. Rev. B 106, 174404 (2022) – Published 3 November 2022  | Electron spin decoherence from atomic vibrations (phonons) limits the performance of spin-based devices but is difficult to model quantitatively. Here, the authors present a new theory for addressing this challenge. Their approach unifies the theoretical treatment of two mechanisms – spin scattering off phonons and spin precession altered by phonons – and provides unprecedented microscopic insight into spin motion in materials. This work enables precise predictions for spin relaxation and decoherence in materials, advancing the quest for spin-based quantum technologies. | | | | | | Editors' Suggestion D. M. Burn, S. L. Zhang, G. van der Laan, and T. Hesjedal Phys. Rev. B 106, 174409 (2022) – Published 9 November 2022  | Studying the dynamic behavior of topological spin textures can unlock future low-energy and high-speed spintronics devices. Recently, the synchrotron-based technique of diffractive ferromagnetic resonance (DFMR) was developed, allowing for element-selective dynamic studies of selected, ordered magnetic modes. In this work, the authors reveal by using DFMR how time-dependent magnetization dynamics couple to the complex spin texture in the well-known chiral magnetic system Cu2OSeO3, uncovering dynamical phase compressing that remained previously hidden using other experimental techniques. | | | | | | Editors' Suggestion A. R. Wildes, J. R. Stewart, M. D. Le, R. A. Ewings, K. C. Rule, G. Deng, and K. Anand Phys. Rev. B 106, 174422 (2022) – Published 18 November 2022  | NiPS3 is a layered van der Waals compound. Like graphite, it can be delaminated down to a monolayer. Unlike graphite, it is magnetic. Neutron inelastic scattering has been performed on bulk single-crystal samples of NiPS3 to measure the magnetic dynamics, key to understanding the magnetic properties. Clear spin waves are observed, quantifying the magnetic exchange within and between the layers and the predominantly planar anisotropy. The findings have important ramifications for NiPS3 in graphene-based research. | | | | | | Editors' Suggestion Bingrui Peng, Hongming Weng, and Chen Fang Phys. Rev. B 106, 174512 (2022) – Published 21 November 2022  | Topological superconductors have drawn wide interest as they host Majorana zero modes potentially useful in quantum computation. The crystalline symmetries remarkably enrich the family of topological superconductors. Here, the authors present a real-space method, called the "wire construction", to construct two-dimensional topological superconductors. A complete classification of 2D topological crystalline superconductors in class DIII is obtained, with anomalous boundary states enumerated. The new method provides a real-space picture for understanding topological superconductors, and should guide the discovery of realistic topological superconducting materials. | | | | | | Editors' Suggestion Hiroki Ikegami and Yasunobu Nakamura Phys. Rev. B 106, 184511 (2022) – Published 21 November 2022  | Understanding the properties of the insulating phase is key to uncovering the nature of the superconductor-insulator quantum phase transition. Here, the authors study two-dimensional Josephson junction arrays, a canonical model system of the superconductor-insulator transition, to clarify how the insulating phase develops. By systematic studies of nonlinear transport properties, they show that the formation of the insulating phase upon decreasing temperature is understood as the localization of Cooper pairs caused by the Berezinskii-Kosterlitz-Thouless mechanism under the influence of a finite-range screening of the interaction between Cooper pairs. | | | | | | Editors' Suggestion M. Kuzmanović, T. Dvir, D. LeBoeuf, S. Ilić, M. Haim, D. Möckli, S. Kramer, M. Khodas, M. Houzet, J. S. Meyer, M. Aprili, H. Steinberg, and C. H. L. Quay Phys. Rev. B 106, 184514 (2022) – Published 28 November 2022  | Equal spin triplet pairs (ESTPs) of nuclei form the ground state of superfluid 3He. ESTPs of electrons have long been sought in superconducting systems. In layered transition metal dichalcogenides with 2H structure, such as NbSe2, ESTP correlations have been predicted to arise from the interaction of the Ising spin-orbit field, which pins the internal spin axis of conventional singlet pairs out-of-plane, and an applied in-plane magnetic field. The tunneling spectroscopy study done here of bilayer NbSe2 shows experimental signatures of these ESTPs. | | | | | | Editors' Suggestion Xu Zhang, Kai Sun, Heqiu Li, Gaopei Pan, and Zi Yang Meng Phys. Rev. B 106, 184517 (2022) – Published 29 November 2022  | Here, the authors find a phenomenological theory of superconductivity in moiré flat band systems. With decreasing temperature, charge excitations are gapped, while charge excitations exist within the gap, shaping a bosonic fluid. Finite band width breaks the symmetry in these two-dimensional systems, making the bosonic fluid coherent and condense. | | | | | | Editors' Suggestion A. Legros, K. W. Post, Prashant Chauhan, D. G. Rickel, Xi He, Xiaotao Xu, Xiaoyan Shi, Ivan Božović, S. A. Crooker, and N. P. Armitage Phys. Rev. B 106, 195110 (2022) – Published 4 November 2022  | The recent observation of cyclotron resonance in optimally doped La2−xSrxCuO4 using terahertz spectroscopy in a high magnetic field has opened new possibilities for the study of cuprate superconductors. Here, the authors measured cyclotron resonance from slightly underdoped to highly overdoped samples. The cyclotron mass is monotonically increasing and positive for all dopings and with a magnitude systematically below the heat capacity mass for under and optimally doped samples, while exceeding it for overdoped samples. These results are surprising as photoemission reveals a Lifshitz transition in the middle of the doping range. The sign of the cyclotron mass determined from a finite frequency resonance is, in conventional theories, a topological quantity only sensitive to whether or not the Fermi surface is closed around holes or electrons. These results should provide motivation to investigate the cyclotron resonance in non-Fermi liquids and systems with strong anisotropic scattering. | | | | | | Editors' Suggestion N. Dessmann, S. G. Pavlov, A. Pohl, V. B. Shuman, L. M. Portsel, A. N. Lodygin, Yu. A. Astrov, N. V. Abrosimov, B. Redlich, and H.-W. Hübers Phys. Rev. B 106, 195205 (2022) – Published 21 November 2022  | Helium-like interstitial donors in silicon have larger binding energies compared to their hydrogen-like counterparts. Long lifetimes of the excited states are expected since one-phonon transitions are not available. Here, the authors study their relaxation dynamics at two different free electron laser facilities using photon echo, transient grating, and pump-probe spectroscopy. In contrast to the theoretical predictions and previous experimental studies, it is found that the relaxation rates are extremely high. These results shed new light on the electron-lattice interaction and open the possibility for further studies of similar materials. | | | | | | Editors' Suggestion Florian Gebhard, Kevin Bauerbach, and Örs Legeza Phys. Rev. B 106, 205133 (2022) – Published 18 November 2022  | Spinless fermions in one dimension with nearest-neighbor transfer amplitude −t and interaction V display a Kosterlitz-Thouless-type quantum phase transition from a Luttinger liquid metal to a charge density wave insulator at finite interaction strength Vc=2t. The authors use the density matrix renormalization group (DMRG) method on rings with L≤512 sites for an accurate localization of the transition. The maximum of the quasiparticle density in the upper Hartree-Fock band, nβmax(L,V)=maxk nk,β(L,V), develops a peak close to the critical interaction whose position extrapolates to the exact result in the thermodynamic limit, limL→∞Vβmax(L,V)=Vc, with an accuracy of better than one percent. Monitoring the Luttinger parameter permits to locate the transition with an accuracy of three percent. | | | | | | Editors' Suggestion Wen-Tao Xu, Jose Garre-Rubio, and Norbert Schuch Phys. Rev. B 106, 205139 (2022) – Published 23 November 2022  | Topological phases - systems with a global ordering in the entanglement - exhibit exotic excitations known as anyons which can display highly nontrivial (non-Abelian) statistics. Through transitions between such phases, these anyons can undergo rather surprising changes. Perhaps most surprisingly, one anyon can split into two or more anyons, some of which might condense or become confined. The authors propose here a complete set of order parameters which allow one to extract the full information about how the properties of anyons change through phase transitions, and to apply them to a range of topological phase transitions. | | | | | | Editors' Suggestion S. Grisard, H. Rose, A. V. Trifonov, R. Reichhardt, D. E. Reiter, M. Reichelt, C. Schneider, M. Kamp, S. Höfling, M. Bayer, T. Meier, and I. A. Akimov Phys. Rev. B 106, 205408 (2022) – Published 10 November 2022  | The authors investigate Rabi rotations, arising in photon echoes from an ensemble of InGaAs quantum dots. To overcome the dephasing of the Rabi rotations imposed by the inhomogeneity of laser intensities, a spatially flat intensity profile is introduced. This allows to observe robust Rabi rotations and to identify efficient coupling to acoustic phonons as the dominating channel of decoherence. The insights gained are crucial for the realization of optical quantum memories based on photon echoes from semiconductor quantum dots. | | | | | | Editors' Suggestion Letter K. S. C. Decker, D. M. Kennes, and C. Karrasch Phys. Rev. B 106, L180201 (2022) – Published 22 November 2022  | Quantum systems are typically ergodic and can be described by a thermal ensemble. In this work, the authors use large-scale tensor network numerics to investigate if a generic two-dimensional disordered Heisenberg model of quantum spins exhibits a nonergodic phase. They provide evidence for the existence of a many-body localized regime at sufficiently strong disorder. They also estimate the critical disorder strength where a crossover into an ergodic regime occurs and address finite-size effects. | | | | | | Editors' Suggestion Letter Feng Ye, Masaaki Matsuda, Zachary Morgan, Todd Sherline, Yifei Ni, Hengdi Zhao, and G. Cao Phys. Rev. B 106, L180402 (2022) – Published 1 November 2022  | Characterizing the magnetic structure is crucial to understand the extraordinary colossal magnetoresistance of ferrimagnetic Mn3Si2Te6. This material exhibits orders of magnitude reduction in resistivity when a magnetic polarization is avoided. Using single-crystal neutron diffraction, the authors reveal here the field evolution of the spin configuration. Prominent magnetic diffuse scattering is present and decays slowly well above the transition. The spin correlation lengths agree well with the electrical resistivity, underscoring the role of magnetic fluctuations contributing to the magnetoresistivity near the transition. | | | | | | Editors' Suggestion Letter Ji Zou, Shu Zhang, and Yaroslav Tserkovnyak Phys. Rev. B 106, L180406 (2022) – Published 23 November 2022  | Magnet-mediated dissipative coupling between spin qubits can be exploited to imprint long-lived quantum entanglement. This work points to a new direction for the application of spintronic schemes in future quantum information technologies, with an eye on the dynamical phase transitions associated with non-Hermitian dynamics of the reduced density matrix. | | | | | | Editors' Suggestion Letter Xiaojian Bai, Frank Lechermann, Yaohua Liu, Yongqiang Cheng, Alexander I. Kolesnikov, Feng Ye, Travis J. Williams, Songxue Chi, Tao Hong, Garrett E. Granroth, Andrew F. May, and Stuart Calder Phys. Rev. B 106, L180409 (2022) – Published 30 November 2022  | Fe3−xGeTe2 is one of the most intensely studied quasi-two-dimensional layered materials of recent times. It can be exfoliated down to a monolayer and has promising applications in room-temperature magnetoelectronics. Here, the authors use neutron scattering and first-principle calculations to study its fundamental magnetic and electronic properties. A rare orbital selective Mott transition was identified that drives the emergence of antiferromagnetic fluctuations within the ferromagnetic order, opening a new avenue in understanding the coexistence of itinerant and local moments and the heavy-fermion physics in this 3d electron system. | | | | | | Featured in Physics Editors' Suggestion Letter Cesare Tresca, Gianni Profeta, Giovanni Marini, Giovanni B. Bachelet, Antonio Sanna, Matteo Calandra, and Lilia Boeri Phys. Rev. B 106, L180501 (2022) – Published 3 November 2022  | In 1911, Kamerlingh Onnes discovered superconductivity, measuring the low-temperature resistivity in mercury. Nowadays, more than 100 years later, many new superconductors have been discovered with higher and higher critical temperatures. Ironically, the exact origin of the superconducting phase in mercury has remained hidden so far. The authors decided to revisit the description of this fascinating material with ab initio techniques, revealing all its intricate physical properties. Despite its apparent simplicity, mercury hides effects that are anything but trivial. Their proper description is a challenging problem and requires advanced computational and theoretical techniques, which have become available only recently. | | | | | | Editors' Suggestion Letter Xinghai Zhang and Matthew S. Foster Phys. Rev. B 106, L180503 (2022) – Published 3 November 2022  | The shape of electron wave functions determines key properties of quantum materials. Very recently, it was found that disorder can turn all wave functions into fractals ("spectrum-wide quantum criticality," SWQC) in models of topological and strongly correlated superconductors. The implications of SWQC for superconductivity itself remain largely unexplored. Here, the authors show that superconductivity can be strongly enhanced near the SWQC Anderson transition in two one-dimensional models. The study highlights a new potential mechanism for achieving higher transition temperatures via random or structured inhomogeneity. | | | | | | Editors' Suggestion Letter Run Xiao, Junyi Zhang, Juan Chamorro, Jinwoong Kim, Tyrel M. McQueen, David Vanderbilt, Morteza Kayyalha, Yi Li, and Nitin Samarth Phys. Rev. B 106, L201101 (2022) – Published 1 November 2022  | A concerted experimental and theoretical investigation of Shubnikov–de Haas oscillations and the integer quantum Hall effect in thin films of Cd3As2 leads to a new understanding of the Landau level spectrum in this archetypal Dirac semimetal under strong quantum confinement conditions. Experiments reveal an emerging ν=3 quantum Hall state as the film thickness is reduced, indicating an enhanced spin splitting. This is consistent with tight-binding calculations that show nonmonotonic enhancement of the g factor with increasing quantum confinement. | | | | | | Editors' Suggestion Letter Moslem Mir and Saeed H. Abedinpour Phys. Rev. B 106, L201102 (2022) – Published 2 November 2022  | Spin-orbit coupling breaks the Galilean invariance in materials, leading to observable many-body corrections to different transport coefficients. Here, the authors study the intrinsic contribution to anomalous Hall and spin Hall conductivities of a magnetic two-dimensional electron liquid with Rashba spin-orbit coupling. They show that both of these responses are strongly affected by electron-electron interaction. The anomalous Hall conductivity is enhanced at low carrier concentrations, while in the same regime, the sign of spin Hall conductivity is reversed. | | | | | | Editors' Suggestion Letter Daniel N. Shanks, Fateme Mahdikhanysarvejahany, Michael R. Koehler, David G. Mandrus, Takashi Taniguchi, Kenji Watanabe, Brian J. LeRoy, and John R. Schaibley Phys. Rev. B 106, L201401 (2022) – Published 3 November 2022  | The ability to deterministically trap and control single interlayer excitons in 2D transition metal dichalcogenide heterostructures opens new opportunities to utilize their spin and valley degrees of freedom for quantum information applications. In this work, the authors fabricate a lithographically defined electrostatic exciton trap using a nanopatterned graphene gate. Photoluminescence measurements show discrete excitation power-dependent emission energies, corresponding to different number states of excitons occupying the trap, with the lowest-energy state corresponding a single-exciton population. | | | | | | Editors' Suggestion Letter Alexandre Artaud, Nicolas Rougemaille, Sergio Vlaic, Vincent T. Renard, Nicolae Atodiresei, and Johann Coraux Phys. Rev. B 106, L201402 (2022) – Published 4 November 2022  | Two-dimensional (2D) superlattices in conventional semiconductors are rigid. In 2D materials, where they are called moiré patterns, they are flexible so the physical properties depend not only on the super-periodicity but also on the 2D membrane's topography. A mixed continuous+atomistic theory, treating 2D materials as crystalline elastic membranes, reveals the role of out-of-plane deformations on the ground-state topography. The model's predictions agree with experimental structural characterizations on model systems (epitaxial graphene and MoS2 on metals) and explain moiré wavelength selection and wrinkling phenomena. | | | | | | | |
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