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- W2891001844 abstract "We generalize the construction of time-reversal symmetry-breaking triple-component semimetals, transforming under the pseudospin-1 representation, to arbitrary (anti-)monopole charge $2 n$, with $n=1,2,3$ in the crystalline environment. The quasiparticle spectra of such systems are composed of two dispersing bands with pseudospin projections $m_s=pm 1$ and energy dispersions $E_{bf k}=pm sqrt{ alpha^2_n k^{2n}_perp +v^2_z k^2_z}$, where $k_perp=sqrt{k^2_x+k^2_y}$, and one completely flat band at zero energy with $m_s=0$. We construct simple tight-binding models for such spin-1 excitations on a cubic lattice and address the symmetries of the generalized triple-component Hamiltonian. In accordance to the bulk-boundary correspondence, triple-component semimetals support $2 n$ branches of topological Fermi arc surface states and also accommodate a emph{large} anomalous Hall conductivity (in the $xy$ plane), given by $sigma^{rm 3D}_{xy} propto 2 n times$ the separation of the triple-component nodes (in units of $e^2/h$). Furthermore, we compute the longitudinal magnetoconductivity, planar Hall conductivity, and magneto thermal conductivity in these systems, which increase as $B^2$ for sufficiently weak magnetic fields ($B$) due to the nontrivial Berry curvature in the medium. A generalization of our construction to arbitrary integer spin systems is also highlighted." @default.
- W2891001844 created "2018-09-27" @default.
- W2891001844 creator A5014591055 @default.
- W2891001844 creator A5034335859 @default.
- W2891001844 creator A5076904972 @default.
- W2891001844 creator A5087019850 @default.
- W2891001844 date "2019-12-06" @default.
- W2891001844 modified "2023-10-12" @default.
- W2891001844 title "Generalized triple-component fermions: Lattice model, Fermi arcs, and anomalous transport" @default.
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- W2891001844 doi "https://doi.org/10.1103/physrevb.100.235201" @default.
- W2891001844 hasPublicationYear "2019" @default.
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