Raman scattering from current-stabilized nonequilibrium phases in
K. Fürsich, J. Bertinshaw, P. Butler, M. Krautloher, M. Minola, and B. Keimer
Phys. Rev. B 100, 081101(R) (2019) - Published 1 August, 2019
Here, the authors study the current-stabilized nonequilibrium semimetallic and metallic phases in CaRuO by Raman light scattering. Using Raman thermometry, they find that Joule heating can be completely avoided by supplying sufficient cooling power. Additionally, they confirm the absence of long-range antiferromagnetic order and identify a substantial Fano broadening of several phonons, which suggests coupling to charge and orbital fluctuations. The results demonstrate that the semimetallic state is a genuine effect of the applied electrical current and that the current-induced phases have characteristics distinct from the equilibrium ones.
Complete description of the magnetic ground state in spinel vanadates
Jyoti Krishna, N. Singh, S. Shallcross, J. K. Dewhurst, E. K. U. Gross, T. Maitra, and S. Sharma
Phys. Rev. B 100, 081102(R) (2019) - Published 2 August, 2019
Classes of metastable thermodynamic quantum time crystals
S. I. Mukhin and T. R. Galimzyanov
Phys. Rev. B 100, 081103(R) (2019) - Published 12 August, 2019
Quantum field theories of many-body systems predict “instantonic crystals” connecting degenerate thermodynamic states with classically broken symmetries. The instantons break continuous translation symmetry of Euclidean space along the axis of imaginary time. The possibility for the emergence of “thermodynamic quantum time crystals” that extremize the Euclidean action of the system appeals to the imagination. However, the authors prove here that at least two general classes of “instantonic crystals”, connecting states of Fermi systems with charge, spin, or superconducting orders can constitute neither thermodynamic equilibrium nor the ground state.
Topology and observables of the non-Hermitian Chern insulator
Mark R. Hirsbrunner, Timothy M. Philip, and Matthew J. Gilbert
Phys. Rev. B 100, 081104(R) (2019) - Published 12 August, 2019
Given the rising importance of non-Hermitian theories that describe open lossy systems, significant research has focused on studying non-Hermitian topological invariants. However, recent work suggests that related observables may no longer be quantized. Here, the authors illustrate the underlying structure of the Green’s function of non-Hermitian Hamiltonians that precludes the quantization of the Chern-Simons coefficient, resulting in the nonquantization of the Hall response of non-Hermitian Chern insulators. By showing nonquantization across a broad class of non-Hermitian Hamiltonians, the authors demonstrate the disconnect in non-Hermitian systems between a topological invariant, the Chern number, and its associated observable, the Hall conductivity.
Topological surface states above the Fermi level in
T. J. Boyle, A. Rossi, M. Walker, P. Carlson, M. K. Miller, J. Zhao, P. Klavins, C. Jozwiak, A. Bostwick, E. Rotenberg, V. Taufour, I. M. Vishik, and E. H. da Silva Neto
Phys. Rev. B 100, 081105(R) (2019) - Published 12 August, 2019
Obtaining Majorana and other boundary modes from the metamorphosis of impurity-induced states: Exact solutions via the T-matrix
Vardan Kaladzhyan and Cristina Bena
Phys. Rev. B 100, 081106(R) (2019) - Published 12 August, 2019
Topological proximity effects in a Haldane graphene bilayer system
Peng Cheng, Philipp W. Klein, Kirill Plekhanov, Klaus Sengstock, Monika Aidelsburger, Christof Weitenberg, and Karyn Le Hur
Phys. Rev. B 100, 081107(R) (2019) - Published 13 August, 2019
Universal shift of the fidelity susceptibility peak away from the critical point of the Berezinskii-Kosterlitz-Thouless quantum phase transition
Lukasz Cincio, Marek M. Rams, Jacek Dziarmaga, and Wojciech H. Zurek
Phys. Rev. B 100, 081108(R) (2019) - Published 19 August, 2019
Interplay between band crossing and charge density wave instabilities
P. D. Grigoriev, A. A. Sinchenko, P. A. Vorobyev, A. Hadj-Azzem, P. Lejay, A. Bosak, and P. Monceau
Phys. Rev. B 100, 081109(R) (2019) - Published 22 August, 2019
Conjectures about the ground-state energy of the Lieb-Liniger model at weak repulsion
Zoran Ristivojevic
Phys. Rev. B 100, 081110(R) (2019) - Published 28 August, 2019













