Universal numerical calculation method for the Berry curvature and Chern numbers of typical topological photonic crystals
Sign Up to like & getrecommendations! Published in 2020 at "Frontiers of Optoelectronics"
DOI: 10.1007/s12200-019-0963-9
Abstract: Chern number is one of the most important criteria by which the existence of a topological photonic state among various photonic crystals can be judged; however, few reports have presented a universal numerical calculation method… read more here.
Keywords: chern numbers; method; universal numerical; topological photonic ... See more keywords
Realization of an anomalous Floquet topological system with ultracold atoms
Sign Up to like & getrecommendations! Published in 2020 at "Nature Physics"
DOI: 10.1038/s41567-020-0949-y
Abstract: Coherent control via periodic modulation, also known as Floquet engineering, has emerged as a powerful experimental method for the realization of novel quantum systems with exotic properties. In particular, it has been employed to study… read more here.
Keywords: realization anomalous; anomalous floquet; system; chern numbers ... See more keywords
Chern numbers for the index surfaces of photonic crystals: Conical refraction as a basis for topological materials
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.98.023826
Abstract: The classification of band structures by topological invariants provides a powerful tool for understanding phenomena such as the quantum Hall effect. This classification was originally developed in the context of electrons but can also be… read more here.
Keywords: chern numbers; numbers index; index surfaces; photonic crystals ... See more keywords
Multitude of topological phase transitions in bipartite dice and Lieb lattices with interacting electrons and Rashba coupling
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.104.235115
Abstract: We report the results of a Hartree-Fock study applied to interacting electrons moving in two different bipartite lattices: the dice and the Lieb lattices, at half-filling. Both lattices develop ferrimagnetic order in the phase diagram… read more here.
Keywords: interacting electrons; multitude topological; phase; dice lieb ... See more keywords
Dirac fermion approach and its application to design high Chern numbers in magnetic topological insulator multilayers
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.107.155114
Abstract: Quantum anomalous Hall (QAH) insulators host topologically protected dissipationless chiral edge states, the number of which is determined by its Chern number. Up to now, the QAH state has been realized in a few magnetic… read more here.
Keywords: fermion approach; high chern; chern numbers; magnetic topological ... See more keywords
Nontrivial Chern Numbers in Three-Terminal Josephson Junctions.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.136807
Abstract: Recently, it has been predicted that the Andreev bound state spectrum of four-terminal Josephson junctions may possess zero-energy Weyl singularities. Using one superconducting phase as a control parameter, these singularities are associated with topological transitions… read more here.
Keywords: terminal josephson; nontrivial chern; chern numbers; three terminal ... See more keywords
Non-Hermitian Chern Bands.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.136802
Abstract: The relation between chiral edge modes and bulk Chern numbers of quantum Hall insulators is a paradigmatic example of bulk-boundary correspondence. We show that the chiral edge modes are not strictly tied to the Chern… read more here.
Keywords: bloch; edge modes; chern numbers; non bloch ... See more keywords