prb.aps.orgPhysical Review B

https://www.googletagmanager.com/ns.html?id=GTM-PNZNVC2P 0 0Journals Physical Review Letters Physical Review X PRX Energy PRX Life PRX Quantum Reviews of Modern Physics Physical Review A Physical Review C Physical Review D Physical Review E Physical Review Research Physical Review Accelerators and Beams Physical Review Applied Physical Review Fluids Physical Review Materials Physical Review Physics Education Research Physical Review Physical Review (Series I) Physics Physique Fizika Physics Magazine Help/Feedback Search/Article Lookup Log in covering condensed matter and materials physics Highlights Recent Accepted Collections Authors Referees Search Press About Editorial Team ANNOUNCEMENT PRB Announces New Chief Editor: Sarma Kancharla April 30, 2024 We are pleased to announce that Sarma Kancharla will assume the position of Chief Editor at PRB, effective April 29, 2024. Read More More News EDITORS’ SUGGESTION Statistical mechanics model for Clifford random tensor networks and monitored quantum circuits The authors explore critical properties of entanglement phase transitions in random tensor networks and monitored quantum circuits with Clifford tensors/gates for on-site Hilbert space dimensions which are powers of a prime number p . Exact mappings to replica spin models and characterizations of their symmetry groups predict that all universal properties will depend only on p . These predictions are confirmed with extensive numerical simulations. The authors also establish multifractal scaling of the purity, reflected in a continuous spectrum of critical exponents, while the typical exponent is the prefactor of the logarithm in the entanglement entropy. Yaodong Li, Romain Vasseur, Matthew P. A. Fisher, and Andreas W. W. Ludwig Phys. Rev. B 109 , 174307 (2024) EDITORS’ SUGGESTION Influence of the electron density on the giant negative magnetoresistance in two-dimensional electron gases Ultrahigh-mobility two-dimensional electron gases show an astonishing robust negative magnetoresistance at zero magnetic field. I n s i t u variation of the electron density enables a deep insight into the nature of this negative magnetoresistance. Here, the authors investigate the temperature-dependent giant negative magnetoresistance (GNMR) as a function of the electron density for several temperatures and currents. They find that the GNMR behavior depends decisively on the electron density. This observation is attributed to a changed disorder potential with electron density. L. Bockhorn et al. Phys. Rev. B 109 , 205416 (2024) EDITORS’ SUGGESTION Unconventional properties of the noncentrosymmetric superconductor Re 8 NbTa Here, the authors report on the superconducting properties of the ternary noncentrosymmetric superconductor Re 8 NbTa, a new member of the Re-based superconductors that are known for the frequent occurrence of time-reversal symmetry breaking and their complex superconducting ground states. Bulk and transverse field muon spin rotation/relaxation (μSR) measurements confirm moderately coupled, fully gapped superconductivity. However, zero-field μSR measurements indicate the possible presence of spin fluctuation/time-reversal symmetry breaking in the superconducting ground state, suggesting the unconventional superconductivity in Re 8 NbTa. R. K. Kushwaha et al. Phys. Rev. B 109 , 174518 (2024) EDITORS’ SUGGESTION Conformal field theory approach to parton fractional quantum Hall trial wave functions Conformal field theory (CFT) has played a pivotal role in understanding the topological phases of matter represented by many fractional quantum Hall effect (FQHE) trial wave functions. Previous papers have shown how the topological properties of a trial wave function expressible as a CFT correlation function can be related to properties of the corresponding CFT, assuming a field-theoretic generalization of Laughlin’s plasma analogy holds. Here, the authors show how these methods can be extended to understand certain topological properties of parton-type FQHE trial wave functions. Greg J. Henderson, G. J. Sreejith, and Steven H. Simon Phys. Rev. B 109 , 205128 (2024) EDITORS’ SUGGESTION Competing anisotropies in the chiral cubic magnet Co 8 Zn 8 Mn 4 unveiled by resonant x-ray magnetic scattering Using x-ray resonant magnetic scattering in vector magnetic fields, this work explores the effect of the anisotropic exchange interaction on the magnetic spiral pitch in the cubic chiral magnet Co 8 Zn 8 Mn 4 . The experimental data reveal up to a 5% variation in the helical pitch within the (001) plane depending on temperature. Furthermore, the results reveal the existence of intrinsic competition between magnetocrystalline and exchange anisotropies in this material, with each favoring different orientations of the helical vector in the ground state. Victor Ukleev et al. Phys. Rev. B 109 , 184415 (2024) EDITORS’ SUGGESTION Multipolar magnetism in 5 d 2 vacancy-ordered halide double perovskites In contrast to dipolar refrigerator magnets, multipolar magnets possess more than just a north pole and a south pole. Using first principles and exact diagonalization calculations, this work establishes transition metal based vacancy-ordered halide double perovskites as new candidates for octupolar magnetism. The authors uncover a non-Kramers doublet ground state in these materials, explain the strong temperature-dependent effective magnetic moment, highlight the breakdown of the classic Kotani plot, and predict hidden octupolar order which may be tested in future experiments. Koushik Pradhan, Arun Paramekanti, and Tanusri Saha-Dasgupta Phys. Rev. B 109 , 184416 (2024) EDITORS’ SUGGESTION Magnetoelectric coupling in the multiferroic hybrid-improper ferroelectric Ca 3 Mn 1.9 Ti 0.1 O 7 In hybrid-improper ferroelectrics, two nonpolar structural distortions jointly give rise to a spontaneous electric polarization. In Ca 3 Mn 1 . 9 Ti 0 . 1 O 7 , this ferroelectric state coexists with antiferromagnetism to yield a new type of multiferroic. Here, the authors show that it is characterized by a pronounced magnetoelectric response of the ferroelectric state to the intrinsic magnetic ordering and to external magnetic fields. Optical second harmonic generation is of particular advantage to this study, as it provides access to the electric polarization with spatial resolution of its domains. Yannik Zemp et al. Phys. Rev. B 109 , 184417 (2024) EDITORS’ SUGGESTION Unified theory of optical absorption and luminescence including both direct and phonon-assisted processes Here, the authors make a fundamental theoretical advancement by unifying the theory of optical transitions in semiconductors including direct and phonon-assisted processes. This unification overcomes the fundamental limitation in the textbook theory of phonon-assisted optical absorption that gives unphysical absorption rates for photon energies greater than the direct band gap. They demonstrate the predictive power of their theory by calculating optical absorption and luminescence in standard semiconductors, and they achieve excellent quantitative agreement with the best available experiments. This work brings a paradigm shift in the theory of optical transitions, and opens the pathway for precise calculations of semiconductor optical properties. Sabyasachi Tiwari, Emmanouil Kioupakis, José Menendez, and Feliciano Giustino Phys. Rev. B 109 , 195127 (2024) EDITORS’ SUGGESTION Moiré fractional Chern insulators. I. First-principles calculations and continuum models of twisted bilayer MoTe 2 The researchers here shed new light on the elusive single-particle model of twisted bilayer MoTe 2 , a material recently highlighted for hosting fractional Chern insulators at zero magnetic field. By leveraging an advanced machine learning method and density functional theory, the team meticulously maps out the band structure across various twist angles, revealing a pivotal band inversion and refining the theoretical landscape. By...