Observation of giant spin-split Fermi-arc with maximal Chern number in the chiral topological semimetal PtGa
Sign Up to like & getrecommendations! Published in 2020 at "Nature Communications"
DOI: 10.1038/s41467-020-15865-x
Abstract: Non-symmorphic chiral topological crystals host exotic multifold fermions, and their associated Fermi arcs helically wrap around and expand throughout the Brillouin zone between the high-symmetry center and surface-corner momenta. However, Fermi-arc splitting and realization of… read more here.
Keywords: chern number; maximal chern; ptga; fermi arc ... See more keywords
Revealing Chern number from quantum metric
Sign Up to like & getrecommendations! Published in 2022 at "Chinese Physics B"
DOI: 10.1088/1674-1056/ac2f2c
Abstract: Chern number is usually characterized by Berry curvature. Here, by investigating the Dirac model of even-dimensional Chern insulator, we give the general relation between Berry curvature and quantum metric, which indicates that the Chern number… read more here.
Keywords: chern number; quantum metric; revealing chern; quantum ... See more keywords
Nontrivial topological phase with a zero Chern number
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.035145
Abstract: A two-dimensional (2D) topological band is characterized by the (first) Chern number. The zero and nonzero Chern numbers usually represent the trivial and nontrivial band topologies, respectively. In this paper, we study an extended Qi-Wu-Zhang… read more here.
Keywords: chern number; topological phase; band; number ... See more keywords
Many-Body Chern Number from Statistical Correlations of Randomized Measurements.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.126.050501
Abstract: One of the main topological invariants that characterizes several topologically ordered phases is the many-body Chern number (MBCN). Paradigmatic examples include several fractional quantum Hall phases, which are expected to be realized in different atomic… read more here.
Keywords: many body; statistical correlations; body chern; randomized measurements ... See more keywords
Chern Number Tunable Quantum Anomalous Hall Effect in Monolayer Transitional Metal Oxides via Manipulating Magnetization Orientation.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.036801
Abstract: Although much effort has been made to explore quantum anomalous Hall effect (QAHE) in both theory and experiment, the QAHE systems with tunable Chern numbers are yet limited. Here, we theoretically propose that NiAsO_{3} and… read more here.
Keywords: magnetization; chern number; monolayer; anomalous hall ... See more keywords
Chern number distribution and quantum phase transition in three-band lattices
Sign Up to like & getrecommendations! Published in 2018 at "Modern Physics Letters B"
DOI: 10.1142/s0217984918501580
Abstract: We numerically study the integer quantum Hall effect on a three-band lattice. With modulating the hopping integral, the peculiar behaviors have been found: (1) Chern numbers of Landau subbands are ... read more here.
Keywords: chern number; three band; band; distribution quantum ... See more keywords
Fractional Quantum Hall Effect in n = 0 Landau Band of Graphene with Chern Number Matrix
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the Physical Society of Japan"
DOI: 10.7566/jpsj.87.063701
Abstract: Fully taking into account of the honeycomb lattice structure, fractional quantum Hall states of graphene are considered by a pseudopotential projected into the n = 0 Landau band. By using a chirality as an internal… read more here.
Keywords: chern number; quantum; landau band; quantum hall ... See more keywords