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Anomalous Transport Signatures in Weyl Semimetals with Point Defects

Title
Anomalous Transport Signatures in Weyl Semimetals with Point Defects
Type
Article in International Scientific Journal
Year
2022
Authors
Joao, SM
(Author)
Other
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Ferreira, A
(Author)
Other
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Amorim, B
(Author)
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Lopes, JMVP
(Author)
FCUP
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Journal
Vol. 129
ISSN: 0031-9007
Other information
Authenticus ID: P-00X-GF2
Abstract (EN): We present the first theoretical study of transport properties of Weyl semimetals with point defects. Focusing on a class of time-reversal symmetric Weyl lattice models, we show that dilute lattice vacancies induce a finite density of quasilocalized states at and near the nodal energy, causing strong modifications to the low-energy spectrum. This generates novel transport effects, namely, (i) an oscillatory behavior of the dc conductivity with the charge carrier density in the absence of magnetic fields, and (ii) a plateau-shaped dissipative optical response for photon frequencies below the interband threshold, EF less than or similar to PLANCK CONSTANT OVER TWO PI omega less than or similar to 2EF. Our results provide a path to engineer unconventional quantum transport effects in Weyl semimetals by means of common point defects.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 6
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