Dynamical signatures of point-gap Weyl semimetal

Hu，Haiping1,2,3; Zhao，Erhai2; Liu，W. Vincent3,4,5

2022-09-01

10.1103/PhysRevB.106.094305

Physical Review B   Impact Factor & Quartile

2469-9950

2469-9969

We demonstrate a few unique dynamical properties of point-gap Weyl semimetal, an intrinsic non-Hermitian topological phase in three dimensions. We consider a concrete model where a pair of Weyl points reside on the imaginary axis of the complex energy plane, opening a point gap characterized by a topological invariant, the three-winding number W3. This gives rise to surface spectra and dynamical responses that differ fundamentally from those in Hermitian Weyl semimetals. First, we predict a time-dependent current flow along the magnetic field in the absence of an electric field, in sharp contrast to the current driven by the chiral anomaly, which requires both electric and magnetic fields. Second, we reveal a type of boundary-skin mode in the wire geometry which becomes localized at two corners of the wire cross section. We explain its origin and show its experimental signatures in wave-packet dynamics.

English

Others

2-s2.0-85139360262

Scopus

1.Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China
2.Department of Physics and Astronomy,George Mason University,Fairfax,22030,United States
3.Department of Physics and Astronomy,University of Pittsburgh,Pittsburgh,15260,United States
4.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Shanghai Research Center for Quantum Sciences,Shanghai,201315,China

Hu，Haiping,Zhao，Erhai,Liu，W. Vincent. Dynamical signatures of point-gap Weyl semimetal[J]. Physical Review B,2022,106(9).

Hu，Haiping,Zhao，Erhai,&Liu，W. Vincent.(2022).Dynamical signatures of point-gap Weyl semimetal.Physical Review B,106(9).

Hu，Haiping,et al."Dynamical signatures of point-gap Weyl semimetal".Physical Review B 106.9(2022).