Nernst thermopower of time-reversal breaking type-II Weyl semimetals

McKay, Robert C.; McCormick, Timothy M.; Trivedi, Nandini

doi:10.1103/physrevb.99.245119

Nernst thermopower of time-reversal breaking type-II Weyl semimetals

Journal Article · Mon Jun 10 00:00:00 EDT 2019 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.99.245119· OSTI ID:1609876

McKay, Robert C. ^[1]; McCormick, Timothy M. ^[2]; Trivedi, Nandini ^[2]

Univ. of Illinois at Urbana-Champaign, IL (United States); DOE/OSTI
The Ohio State Univ., Columbus, OH (United States)

Weyl semimetals host linear energy dispersions around Weyl nodes, as well as monopoles of Berry curvature in momentum space around these points. These features give rise to unique transport signatures in a Weyl semimetal, such as transverse transport without an applied magnetic field, known as anomalous transport. The type-II Weyl semimetal, recently experimentally demonstrated in several materials, is classified by a tilting of the Weyl nodes. Furthermore, this paper provides a theoretical study on thermoelectric transport in time-reversal breaking type-II Weyl semimetals. Our results examine the balance between anomalous and nonanomalous contributions to the Nernst effect when subject to an external magnetic field. We also show how increasing scattering times have an enhancing effect on thermoelectric transport in these materials. Since a temperature-dependent chemical potential has been theoretically shown to be paramount when considering anomalous transport, we also study how similar considerations impact the Nernst thermopower in the nonanomalous case.

View Accepted Manuscript (DOE)

Research Organization:: The Ohio State Univ., Columbus, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: FG02-07ER46423

OSTI ID:: 1609876

Alternate ID(s):: OSTI ID: 1546218

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 24 Vol. 99; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
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Nernst thermopower of time-reversal breaking type-II Weyl semimetals

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