The robustness of triple point fermions against disorder
ORAL
Abstract
Triple point fermions (TPFs) are fermionic quasiparticles in solids with pseudospin degree of freedom 1 which do not have the counterpart in the standard model. A TPF node is a topological monopole with Chern number ±2. In this study, we show that the TPF nodes and Fermi arcs are robust against disorder, in contrast to the quadratic Weyl nodes shown in previous studies. Comparing the white noise and correlated disorder, we find that the internode scattering is the main mechanism for destroying the TPF nodes. Moreover, we compute the Berry curvature carried by the Fermi arcs and discuss the disorder effects on the surface Berry curvature.
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Presenters
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Hsiu-Chuan Hsu
National Chengchi University
Authors
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Hsiu-Chuan Hsu
National Chengchi University
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Ion C Fulga
IFW Dresden, IFW - Dresden
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Jhih-Shih You
National Taiwan Normal University, Department of Physics, National Taiwan Normal University, National Taiwan Normal University, Taipei 11677, Taiwan, Department of Physics, National Taiwan Normal University,