| Volume 109, Issues 5 - 8 February 2024 | | Advertisement  | In this year, 2024, 156 Outstanding Referees were selected from the 91,600 currently active referees. The honorees come from over 42 different countries and will be recognized at the upcoming March Meeting. Read more. | | | | | |
Advertisement Don't miss these exciting Physical Review Journals events at the 2024 APS March Meeting | | | Advertisement The American Physical Society is conducting an international search for a new Lead Editor of Physical Review Applied, our premier journal for Applied Physics Research.
The Lead Editor is the lead scientific advisor to the journal and chairs the Editorial Board. They provide community oversight of the journal's content and direction, strategically advising the journal's Chief Editor in a consultative capacity. The role is key in helping to shape the journal's long-term goals, and growing and elevating the journal within the community. Learn more. | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Editors' Suggestion Xiao-Hui Gou, Hua-Shan Lai, Xiao-Chen Sun, Si-Yuan Yu, Y. B. Chen, Cheng He, and Yan-Feng Chen Phys. Rev. B 109, 054109 (2024) – Published 15 February 2024  | Graphene structures usually accommodate one pair of Dirac cones, naturally forming a single kink valley state after symmetry breaking. The authors report here that acoustic S-graphene, i.e., a carbon allotrope of graphene, can harbor two pairs of Dirac cones, further shaping double-kink valley states. By selectively exciting different symmetric or antisymmetric branches, robust yet tunable superdirectional sound radiation is experimentally demonstrated. This study could double the degrees of freedom for valleytronics and help in the design of unique functional devices. | | | | | | Editors' Suggestion Seamus D. O'Hara, Joseph B. Costello, Qile Wu, Ken West, Loren Pfeiffer, and Mark S. Sherwin Phys. Rev. B 109, 054308 (2024) – Published 20 February 2024  | Interferometers that manipulate and detect electromagnetic waves are indispensable to science. Quasiparticles in crystalline solids can be described as Bloch waves, but rapid dephasing of accelerating charged quasiparticles has so far prevented the development of interferometers sensitive to their inertial properties. Here, the authors show that polarizations of near-infrared sidebands emitted by GaAs in strong terahertz fields can be viewed as interferograms from a Michelson-like interferometer for Bloch waves. A simple analytical model connects these inteferograms to quasiparticle masses and dephasing. | | | | | | Editors' Suggestion Attila Szabó, Sylvain Capponi, and Fabien Alet Phys. Rev. B 109, 054410 (2024) – Published 8 February 2024  | The authors obtain here the symmetry-resolved low-energy spectrum of the Heisenberg model on fullerene geometries using a neural-network-based variational technique. They also develop a theoretical framework, based on Anderson towers of states, to interpret these spectra. The authors find that the hexagonal faces of the fullerenes favour incipient Néel ordering, which is, however, frustrated by the pentagonal faces. This brings about exotic noncoplanar and chiral magnetic ordering, with possible interesting ramifications for fullerene superconductivity. | | | | | | Editors' Suggestion Gerhard Jung, Giulio Biroli, and Ludovic Berthier Phys. Rev. B 109, 064205 (2024) – Published 14 February 2024  | Dynamic heterogeneities represent a critical aspect of glassy dynamics, and their analysis constitutes a fundamental step in understanding the essence of the glass transition. The authors employ physics-inspired machine learning to predict the microscopic structural relaxation from amorphous configurations of deeply supercooled liquids. Leveraging the transferability in temperature of the trained networks enables the prediction of dynamic heterogeneities at the experimental glass transition temperature, thereby circumventing the prohibitively large computational cost associated with conventional simulation methods at such low temperatures. | | | | | | Editors' Suggestion K. R. Fast, J. E. Losby, G. Hajisalem, P. E. Barclay, and M. R. Freeman Phys. Rev. B 109, 064404 (2024) – Published 5 February 2024  | The Einstein-de Haas (EdH) effect is a consequence of angular momentum conservation wherein a physical rotation of a magnetic body results from a change in magnetization. A micromechanical resonator supporting a ladder of resonances is used to explore the inherent frequency dependence of torque resulting from this rotation in a thin-film permalloy sample, utilizing cavity optomechanical readout. Giant EdH torques are found at a gyrotropic magnetic resonance in the permalloy, which overlaps a high-order mechanical resonance of the sensor. | | | | | | Editors' Suggestion Margarita G. Dronova, Václav Petříček, Zachary Morgan, Feng Ye, Daniel M. Silevitch, and Yejun Feng Phys. Rev. B 109, 064421 (2024) – Published 23 February 2024  | The magnetism in the spinel compound ZnFe2O4 is one of the examples in P.W. Anderson's original discussion of magnetic order and disorder on the pyrochlore lattice in the 1950's. It has been studied for over seven decades, but the details of the ordering have remained unresolved. Here, a combination of high-quality single crystal growth, continuous-wave neutron diffraction, and a representation analysis based magnetic refinement reveal a noncollinear spin structure of alternatively stacked ferromagnetic and antiferromagnetic tetrahedra in a three-dimensional checkerboard array. This rare magnetic structure is stabilized by the existing breathing pyrochlore lattice and provides a precise insight into the magnetic structure factor, which challenges the claim for a classical spin liquid in several chromate spinel oxides. | | | | | | Editors' Suggestion P. A. Nosov, Yi-Ming Wu, and S. Raghu Phys. Rev. B 109, 075107 (2024) – Published 5 February 2024  | The free energy of metals in a magnetic field exhibits oscillations, influencing thermodynamics and transport. Typically, these oscillations are interpreted using the Lifshitz-Kosevich theory, which assumes nearly free electrons. Here, the authors study quantum oscillations in three-dimensional metals near quantum phase transitions, where electrons are strongly-coupled. Naive extensions of the Lifshitz-Kosevich formula to this state result in a finite zero-temperature entropy, contradicting the laws of thermodynamics. They authors propose a new thermodynamically consistent theory of magneto-oscillations, yielding a distinct temperature dependence of the oscillation amplitudes. | | | | | | Editors' Suggestion V. K. Singh, K. Nam, M. Barik, K. Boya, E. Kermarrec, P. Khuntia, Kee Hoon Kim, S. Bhowal, and B. Koteswararao Phys. Rev. B 109, 075128 (2024) – Published 13 February 2024  | P. W. Anderson once proposed a "resonating valence bond" ground state of a 2D square lattice, an exotic disordered state formed by spin-pair superposition due to large quantum zero-point motion. However, perfect square-lattice materials realized so far exhibit long-range order with a reduced ordered moment. Here, the authors introduce a new quantum magnet, Bi2YbO4Cl, synthesized by the hydrothermal method. This compound realizes spin-orbit entangled moments in a 2D square lattice and maintains spin disorder down to several millikelvin temperatures. | | | | | | Editors' Suggestion Tianhao Ren, Elio J. König, and Alexei M. Tsvelik Phys. Rev. B 109, 075145 (2024) – Published 21 February 2024  | This work describes a chiral Kondo chain model with symplectic symmetry. The authors demonstrate that it has a quantum critical ground state populated by non-Abelian anyons. Such a model is more robust than previously proposed models, and it can be experimentally implemented using hybrid quantum devices featuring superconducting islands coupled to chiral edges of topological insulators. Proposals for measurement-only anyonic quantum computations and error mitigations based on such a setup are provided. | | | | | | Editors' Suggestion Yi-Fan Jiang, Thomas P. Devereaux, and Hong-Chen Jiang Phys. Rev. B 109, 085121 (2024) – Published 14 February 2024  | The authors employ the density-matrix renormalization group to investigate the doped Hubbard model on six-leg square cylinders. It uncovers a rich quantum phase diagram, intricately sensitive to next-nearest-neighbor electron hopping (t′). The positive-t′ region shows a robust d-wave superconducting phase with intertwined superconducting and charge-density-wave orders. In contrast, the negative-t′ side remains insulating, where doped holes form either long-range charge stripe order at small t′ or a holon Wigner crystal with one doped hole per emergent unit cell and short-range spin correlations at larger t'. | | | | | | Editors' Suggestion Alexander Kirchhoff, Thorsten Deilmann, and Michael Rohlfing Phys. Rev. B 109, 085127 (2024) – Published 16 February 2024  | Optical excitation and deexcitation processes are governed by the dependence of the involved energy levels on the atom positions. This geometry dependence is calculated here for several defects in h-BN, e.g., CBVN, within constrained density functional theory and many-body perturbation theory. The investigated Stokes shifts show distinct differences compared to experiments. For the Tamm-Dancoff approximation, an approximation frequently employed in the calculation of exciton energies in crystalline solids, the authors find small but significant influence for defect systems. | | | | | | Editors' Suggestion Yuki Utsumi Boucher, Izabela Biało, Mateusz A. Gala, Wojciech Tabiś, Marcin Rosmus, Natalia Olszowska, Jacek J. Kolodziej, Bruno Gudac, Mario Novak, Naveen Kumar Chogondahalli Muniraju, Ivo Batistić, Neven Barišić, Petar Popčević, and Eduard Tutiš Phys. Rev. B 109, 085135 (2024) – Published 23 February 2024  | The intercalation with magnetic ions (Ni, Co) provides strong spin-selective hybridization between NbS2 layers. The symmetries of dominant bridging orbitals as displayed in the accompanying figure (a, b) and the type of magnetic order strongly affect the electronic structure and the conduction bands (c), as seen in ARPES spectra and understood through DFT+U calculations. In addition, the magnetic fluctuations at bridging sites are prone to produce strong electron correlation effects at the Fermi level (d), inaccessible by DFT+U calculations. | | | | | | Editors' Suggestion Benjamin Joecker, Holly G. Stemp, Irene Fernández de Fuentes, Mark A. I. Johnson, and Andrea Morello Phys. Rev. B 109, 085302 (2024) – Published 7 February 2024  | Quantum nondemolition measurements (QNDMs) are a precious resource for quantum computing. They are an integral part of the surface code, the holy grail of quantum error correction, and can boost initialization and readout fidelities through repeated measurements. In spin systems, scalable QNDMS are achievable by coupling to ancillary spins read via charge reservoirs. Here, the authors develop a model to quantify how small deviations from true QNDMs in real spin system can introduce bit-flip errors and analyze how they can be minimized. | | | | | | Editors' Suggestion D. B. Karki, K. A. Matveev, and Ivar Martin Phys. Rev. B 109, 085410 (2024) – Published 12 February 2024  | Realizing perfectly decoupled Majorana zero modes (MZMs) – the key element of proposed topological quantum computers – remains a challenge so far. Fortunately, even a few imperfect MZMs can be used to qualitatively extend the behavior of standard superconducting qubits. Such hybrid devices take advantage of the interplay of Cooper pair tunneling, coherent single-electron tunneling, and Majorana hybridization. Here, the authors offer a detailed description and present various analytical approaches to addressing the complex behavior of the MZM-superconducting qubit hybrid. Some practical applications of such a hybrid device are highlighted. | | | | | | Editors' Suggestion Isaac B. W. Harris and Dirk Englund Phys. Rev. B 109, 085414 (2024) – Published 14 February 2024  | Group-IV color centers in diamond are a promising platform for quantum entanglement distribution experiments. However, they suffer from a phonon-mediated decoherence mechanism that limits the maximum temperature at which they can operate. This theoretical work develops a model that accurately predicts coherence time, and further predicts regimes in which the coherence can be extended, potentially leading to higher-temperature operation. | | | | | | Editors' Suggestion Jakub Rosiński, Michał Gawełczyk, Karol Tarnowski, Paweł Karwat, Daniel Wigger, and Paweł Machnikowski Phys. Rev. B 109, 085431 (2024) – Published 26 February 2024  | A quantum emitter coupled to a photonic waveguide may emit photons in one particular direction. It is, however, challenging to create a system that matches the requirements of the directional coupling over a broad area of the waveguide. The authors show here that a properly designed quantum dot can be fine tuned in situ with a magnetic field to yield the desired directionality. This finding overcomes the obstacles on the path to efficient chiral coupling in QD-based photonic integrated circuits. | | | | | | Editors' Suggestion Letter Maxime Gidding, Carl S. Davies, and Andrei Kirilyuk Phys. Rev. B 109, L060408 (2024) – Published 23 February 2024  | Infrared pulses can be used to generate ultrafast strains in magnetic dielectrics, leading to magnetisation switching. Here, the authors find that in multidomain samples, such strains can drive domain reorientation, with the domains becoming aligned along the magnetocrystalline anisotropy axes. Moreover, the application of subsequent pulses leads to the pushing of the reoriented domains far beyond the radius of the infrared pulse. | | | | | | Editors' Suggestion Letter H. Handa, Y. Okamura, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, Y. Tokura, and Y. Takahashi Phys. Rev. B 109, L081102 (2024) – Published 2 February 2024  | Recent advances in high-field terahertz technologies can unveil the nonlinear response of elementary excitations. This work finds large-amplitude coherent phonon dynamics in the fully anharmonic regime by intense terahertz excitation of the ferroelectric semiconductor In-doped (Sn,Pb)Te. The high-field resonant drive of soft phonons induces the dramatic shift of transient phonon frequency near the ferroelectric transition point. This highly nonlinear terahertz response quantitatively reveals a phonon potential dominated by strong anharmonicity and temporal lattice dynamics with giant atomic displacement. | | | | | | Editors' Suggestion Letter V. A. Zakharov, A. Mert Bozkurt, A. R. Akhmerov, and D. O. Oriekhov Phys. Rev. B 109, L081103 (2024) – Published 5 February 2024  | Several of the recently discovered 2D layered quantum materials host higher-order Van Hove singularities near the charge neutrality point. The authors develop here a universal description for magnetic breakdown near different types of higher-order Van Hove singularities. The observation of such a magnetic breakdown via measurement of quantum oscillations or longitudinal bulk conductance in a quantum Hall bar allows for reconstruction of a Fermi surface and classification of the corresponding saddle point in dispersion. | | | | | | Editors' Suggestion Letter Yingying Cao and Yi-feng Yang Phys. Rev. B 109, L081105 (2024) – Published 8 February 2024  | This work describes systematic strongly correlated electronic structure calculations for the candidate double-layer high-temperature superconductor La3Ni2O7 under pressure. These reveal the localized-itinerant duality of Ni dz2 electrons, flat dz2 and dx2−y2 quasiparticle bands, and strong interlayer antiferromagnetic correlations due to the interplay of orbital-selective Mott, Hund, and Kondo physics. These results imply a two-component theory with possibly preformed interlayer pairing for the high-temperature superconductivity in pressurized La3Ni2O7. The strange metallicity in the normal state is also explained from the quasiparticle lifetimes. | | | | | | Editors' Suggestion Letter Menghan Song, Jiarui Zhao, Yang Qi, Junchen Rong, and Zi Yang Meng Phys. Rev. B 109, L081114 (2024) – Published 26 February 2024  | The authors conduct here a pioneering and unbiased investigation into the entanglement properties of (2+1)-dimensional O(3) quantum critical points and two-dimensional Néel states in systems with long-range interactions. This study uncovers exotic properties, such as the vanishing of logarithmic corrections to entanglement entropies at QCPs and an enhancement in Néel states as long-range interactions amplify. Moreover, they determine precise critical exponents of QCPs influenced by long-range interactions, characterized by three distinct renormalization group fixed points. | | | | | | Featured in Physics Editors' Suggestion Letter Fredrik Brange, Riya Baruah, and Christian Flindt Phys. Rev. B 109, L081402 (2024) – Published 6 February 2024  | By adiabatically changing the energy levels of two quantum dots, theoreticians predict that it should be possible to control the splitting of Cooper pairs from a superconductor. Such an adiabatic Cooper pair splitter could serve as an on-demand source of entangled electrons in future solid-state quantum technologies. | | | | | | | |
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