Results 11 to 20 of about 785,798 (358)

Chiral Symmetry Breaking for Deterministic Switching of Perpendicular Magnetization by Spin-Orbit Torque. [PDF]

open access: yesNano letters (Print), 2020
Symmetry breaking is a characteristic to determine which branch of a bifurcation system follows upon crossing a critical point. Specifically, in spin-orbit torque (SOT) devices, a fundamental question arises: how can the symmetry of the perpendicular ...
Hao Wu   +13 more
semanticscholar   +1 more source

Chiral Symmetry of Baryons [PDF]

open access: yesProgress of Theoretical Physics, 2001
We study chiral symmetry aspects of the positive and negative parity baryons by identifying them with linear representations of the chiral group $SU(N_{f}) \otimes SU(N_{f})$. It is shown that there are two distinctive schemes: naive and mirror assignments.
A. Hosaka, D. Jido, M. Oka
openaire   +6 more sources

Topological invariants and phase diagrams for one-dimensional two-band non-Hermitian systems without chiral symmetry [PDF]

open access: yesPhysical Review A, 2018
We study topological properties of one-dimensional non-Hermitian systems without chiral symmetry and give phase diagrams characterized by topological invariants $\nu_E$ and $\nu_{total}$, associated with complex energy vorticity and summation of Berry ...
Hui Jiang, Chao Yang, Shu Chen
semanticscholar   +1 more source

Second-order topological phases protected by chiral symmetry [PDF]

open access: yesPhysical review B, 2019
We study second-order topological insulators and semimetals characterized by chiral symmetry. We investigate topological phase transitions of a model for construction of the two-dimensional second-order topological insulators protected only by chiral ...

semanticscholar   +1 more source

Symmetry-protected exceptional rings in two-dimensional correlated systems with chiral symmetry [PDF]

open access: yesPhysical review B, 2018
Emergence of exceptional points in two dimensions is one of the remarkable phenomena in non-Hermitian systems. We here elucidate the impacts of symmetry on the non-Hermitian physics.
Tsuneya Yoshida   +3 more
semanticscholar   +1 more source

Chiral approximation to twisted bilayer graphene: Exact intravalley inversion symmetry, nodal structure, and implications for higher magic angles [PDF]

open access: yes, 2020
This paper presents a mathematical and numerical analysis of the flatband wavefunctions occurring in the chiral model of twisted bilayer graphene at the "magic" twist angles.
Jie Wang   +3 more
semanticscholar   +1 more source

Topology Classification using Chiral Symmetry and Spin Correlations in Graphene Nanoribbons.

open access: yesNano letters (Print), 2020
We apply the topological classification theory using chiral symmetry to graphene nanoribbons (GNRs). This approach eliminates the requirement of time-reversal and spatial symmetry in previous Z2 topology theory, resulting in a Z classification with the ...
Jingwei Jiang, S. Louie
semanticscholar   +1 more source

Anomaly constraint on massless QCD and the role of Skyrmions in chiral symmetry breaking [PDF]

open access: yesJournal of High Energy Physics, 2018
A bstractWe discuss consequences of the ’t Hooft anomaly matching condition for Quantum Chromodynamics (QCD) with massless fundamental quarks. We derive the new discrete ’t Hooft anomaly of massless QCD for generic numbers of color Nc and flavor Nf , and
Y. Tanizaki
semanticscholar   +1 more source

Anomaly constraints on gapped phases with discrete chiral symmetry [PDF]

open access: yesPhysical Review D, 2019
We prove that in $(3+1)d$ quantum field theories with ${\mathbb{Z}}_{N}$ symmetry, certain anomalies forbid a symmetry-preserving vacuum state with a gapped spectrum.
Clay Córdova, K. Ohmori
semanticscholar   +1 more source

Deconfinement and chiral symmetry restoration [PDF]

open access: yesJournal of Physics G: Nuclear and Particle Physics, 2004
4 pages, 1 figure, proceedings of Quark Matter ...
A. Mocsy   +3 more
openaire   +3 more sources

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