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Second-harmonic voltage responce for the magnetic Weyl semimetal Co$_3$Sn$_2$S$_2$ | | V.D. Esin
; A.V. Timonina
; N.N. Kolesnikov
; E.V. Deviatov
; | | Date: |
4 May 2020 | | Abstract: | We experimentally investigate longitudinal and transverse second-harmonic
voltage response to ac electrical current for a magnetic Weyl semimetal
Co$_3$Sn$_2$S$_2$. In contrast to the previously observed Berry-curvature
induced non-linear Hall effect for non-magnetic Weyl and Dirac semimetals, the
second-harmonic transverse voltage demonstrates sophisticated interplay of
different effects for Co$_3$Sn$_2$S$_2$. In high magnetic fields, it is of
Seebeck-like square-B law, while the low-field behavior is found to be linear
and sensitive to the direction of sample magnetization. The latter can be
expected both for the non-linear Hall effect and for the surface state
contribution to the Seebeck effect in Weyl semimetals. Thus, thermoelectric
effects are significant in Co$_3$Sn$_2$S$_2$, unlike non-magnetic Weyl and
Dirac materials. | | Source: | arXiv, 2005.1298 | | Services: | Forum | Review | PDF | Favorites | |
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