Emergent Phenomena with Broken Parity-Time Symmetry: Odd-order vs. Even-order Effects
arXiv:2402.13875 · doi:10.1103/PhysRevB.109.104413
Abstract
Symmetry often governs the laws of nature, and breaking symmetry accompanies a new order parameter and emergent observable phenomena. Herein, we focus on broken Parity (P)-Time (T) symmetry, which lifts the Kramers' degeneracy, and thus, guarantees non-trivial spin textures in excitation spectra. To attain non-zero measurables, we use the concept of symmetry operational similarity (SOS), which consider the symmetry relationship between a specimen and an experimental setup, rather than the symmetry of specific coupling terms. Even without specific coupling terms, this SOS approach can tell if the relevant phenomenon is a zero, non-zero odd-order or non-zero even-order effect. We discuss systematically numerous steady-state physical phenomena, in which breaking P-T symmetry is a necessary condition. These phenomena include Odd-order or Even-order Anomalous Hall Effect, Optical activities, Directional nonreciprocity in transverse magnetic field, Diagonal or Off-diagonal current-induced magnetization (current can be associated with electrons, phonons, or light), Diagonal or Off-diagonal piezomagnetism and piezoelectricity. Some of these phenomena turn out to be conjugate to each other through P to T. Our findings unveil numerous new non-traditional candidate materials for various exotic physical phenomena, many of which have never been realized in the standard coupling term/tensorial approaches, and are a transformative and unconventional avenue for symmetry-guided materials designs and discoveries.
29 pages, 3 figures, 1 Table
References in corpus (22)
- The Valley Hall Effect in MoS2 Transistors
- First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
- Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
- Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
- Observation of parity-time symmetry breaking in a single spin system
- Intrinsic nonlinear Hall effect in antiferromagnetic tetragonal CuMnAs
- Polarized phonons carry the missing angular momentum in femtosecond demagnetization
- Truly chiral phonons in α-HgS
- Orbital magnetic moments of phonons
- Altermagnetism with Non-collinear Spins
- Chiral phonons probed by X rays
- Giant -axis nonlinear anomalous Hall effect in T-MoTe and WTe
- Multipole classification in 122 magnetic point groups for unified understanding of multiferroic responses and transport phenomena
- Piezomagnetic switching of anomalous Hall effect in an antiferromagnet at room temperature
- Chirality-Induced Electrical Generation of Magnetism in Nonmagnetic Elemental Tellurium
- Higher-Order Nonlinear Anomalous Hall Effects Induced by Berry Curvature Multipoles
- Permutable SOS (Symmetry Operational Similarity)
- Field-tunable toroidal moment in a chiral-lattice magnet
- Light-Induced Static Magnetization: Nonlinear Edelstein Effect
- Observation of an Anomalous Hall Effect in Single-crystal Mn3Pt
- Linking emergent phenomena and broken symmetries through one-dimensional objects and their dot/cross products
- Helical magnetic order and Fermi surface nesting in non-centrosymmetric ScFeGe