Ferroic Berry Curvature Dipole in a Topological Crystalline Insulator at Room Temperature.
Sign Up to like & getrecommendations! Published in 2023 at "Nano letters"
DOI: 10.1021/acs.nanolett.2c04900
Abstract: The physics related to Berry curvature is now a central research topic in condensed matter physics. The Berry curvature dipole (BCD) is a significant and intriguing condensed matter phenomenon that involves inversion symmetry breaking. However,… read more here.
Keywords: physics; crystalline insulator; berry curvature; topological crystalline ... See more keywords
Interface-induced sign reversal of the anomalous Hall effect in magnetic topological insulator heterostructures
Sign Up to like & getrecommendations! Published in 2021 at "Nature Communications"
DOI: 10.1038/s41467-020-20349-z
Abstract: The Berry phase picture provides important insights into the electronic properties of condensed matter systems. The intrinsic anomalous Hall (AH) effect can be understood as the consequence of non-zero Berry curvature in momentum space. Here,… read more here.
Keywords: magnetic topological; anomalous hall; hall; hall effect ... See more keywords
Nonlinear photoresponse of type-II Weyl semimetals
Sign Up to like & getrecommendations! Published in 2019 at "Nature Materials"
DOI: 10.1038/s41563-019-0296-5
Abstract: The experimental manifestation of topological effects in bulk materials is attracting enormous research interest. However, direct experimental evidence of the effective k-space monopole of the Weyl nodes has so far been lacking. Here, signatures of… read more here.
Keywords: weyl; berry curvature; photoresponse type; nonlinear photoresponse ... See more keywords
Studying local Berry curvature in 2H-WSe2 by circular dichroism photoemission utilizing crystal mirror plane
Sign Up to like & getrecommendations! Published in 2021 at "Scientific Reports"
DOI: 10.1038/s41598-020-79672-6
Abstract: It was recently reported that circular dichroism in angle-resolved photoemission spectroscopy (CD-ARPES) can be used to observe the Berry curvature in 2H-WSe2 (Cho et al. in Phys Rev Lett 121:186401, 2018). In that study, the… read more here.
Keywords: mirror plane; berry curvature; crystal mirror;
Scaling of Berry-curvature monopole dominated large linear positive magnetoresistance
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2208505119
Abstract: Significance The large linear positive magnetoresistance (LPMR) is widely observed in emergent topological materials. Various explanations, including linear band structure, impurity scattering, guiding center motion, or internode scattering, have been proposed. However, experimentally, this phenomenon… read more here.
Keywords: large linear; linear positive; positive magnetoresistance; berry curvature ... See more keywords
On critical properties of the Berry curvature in the Kitaev honeycomb model
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Statistical Mechanics: Theory and Experiment"
DOI: 10.1088/1742-5468/ab35e9
Abstract: We analyse the Kitaev honeycomb model, by means of the Berry curvature with respect to Hamiltonian parameters. We concentrate on the ground-state vortex-free sector, which allows us to exploit an appropriate Fermionisation technique. The parameter… read more here.
Keywords: berry curvature; honeycomb model; curvature; kitaev honeycomb ... See more keywords
Highly Tunable Nonlinear Hall Effects Induced by Spin-Orbit Couplings in Strained Polar Transition-Metal Dichalcogenides
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.13.024053
Abstract: Recently, signatures of nonlinear Hall effects induced by Berry curvature dipoles have been found in atomically thin 1Td-WTe2. In this work, we show that in strained polar transition-metal dichalcogenides(TMDs) with 2H-structures, Berry curvature dipoles created… read more here.
Keywords: effects induced; hall effects; berry curvature; strained polar ... See more keywords
Berry curvature unravelled by the anomalous Nernst effect in Mn3Ge
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.085111
Abstract: The discovery of topological quantum materials represents a striking innovation in modern condensed matter physics with remarkable fundamental and technological implications. Their classification has been recently extended to topological Weyl semimetals, i.e., solid state systems… read more here.
Keywords: weyl; berry curvature; physics; nernst effect ... See more keywords
Berry curvature induced thermopower in type-I and type-II Weyl semimetals
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.085406
Abstract: Berry curvature acts analogously to a magnetic field in the momentum space, and it modifies the flow of charge carriers and entropy. This induces several intriguing magnetoelectric and magnetothermal transport phenomena in Weyl semimetals. Here,… read more here.
Keywords: weyl; field; berry curvature; weyl semimetals ... See more keywords
Linear magnetoresistance induced by intra-scattering semiclassics of Bloch electrons
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.201410
Abstract: The weak field magnetoresistance has seen a revived interest due to the distinct role played by the momentum-space Berry curvature of Bloch electrons. While most previous studies in this regard focus on the inter-scattering motion… read more here.
Keywords: bloch electrons; linear magnetoresistance; magnetoresistance induced; magnetoresistance ... See more keywords
Higher-dimensional generalizations of Berry curvature
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.235130
Abstract: A family of finite-dimensional quantum systems with a non-degenerate ground state gives rise to a closed 2-form on the parameter space: the curvature of the Berry connection. Its cohomology class is a topological invariant of… read more here.
Keywords: higher dimensional; parameter space; dimensional generalizations; curvature ... See more keywords