2019/01/31 by Kai Li, Li Kai
Mathematics · Physics and Astronomy · #Coupling (piping) #Dirac (video compression format) #Fermion #Geometry #Homogeneous space #Hubbard model #Mathematical physics #Mathematics #Orbit (dynamics) #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Spin–orbit interaction #Superconductivity #Symmetry (geometry) #Theoretical physics #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el #cond-mat.supr-con #nlin.SI
paper · pdf · doi:10.1103/physrevb.102.165150
published as Phys. Rev. B 102, 165150 (2020) · Published version (PRB Editors Suggestion)
arxiv created 2020/10/28 · openalex publication_date 2020/10/28 · arxiv updated 2020/10/30 · openalex created_date 2020/11/09 · openalex updated_date 2026/08/05
The authors study the \ensuremathη-pairing phenomenon in correlated fermion models with spin-orbit coupling. Spin-orbit coupled systems are usually thought to possess no continuous symmetries, except the conventional U(1) particle-number symmetry. The \ensuremathη-pairing reveals an exact SU(2) pseudospin symmetry in a broad class of spin-orbit coupled Hubbard models. Furthermore, the authors construct an exactly solvable interacting Dirac-semimetal model that exhibits an exact pseudospin symmetry with fine-tuned parameters. This model hosts \ensuremathη-pairing and charge density wave ground states, which meet at an exactly solvable multicritical line.