Phenomenal magneto-elastoresistance of WTe2: strain engineering of electronic and quantum transport properties

dc.contributor.author Orth, Peter
dc.contributor.author Jo, Na Hyun
dc.contributor.author Wang, Lin-Lin
dc.contributor.author Canfield, Paul
dc.contributor.author Orth, Peter
dc.contributor.author Bud’ko, Sergey
dc.contributor.author Canfield, Paul
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.date 2019-11-19T19:36:25.000
dc.date.accessioned 2020-06-30T06:20:18Z
dc.date.available 2020-06-30T06:20:18Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.issued 2019-01-01
dc.description.abstract <p>Elastoresistance describes the relative change of a material's resistance when strained. It has two major contributions: strain induced geometric and electronic changes. If the geometric factor dominates, like in ordinary metals such as copper, the elastoresistance is positive and rather small, i.e. typically of order 1. In a few materials, however, changes in electronic structure dominate, which gives rise to larger and even negative values, such as (-11) for Bi. Here, we report that the transition metal dichalcogenide (TMDC) WTe2 is a member of the second group, exhibiting a large and non-monotonic elastoresistance that is about (-20) near 100 K and changes sign at low temperatures. We discover that an applied magnetic field has a dramatic effect on the elastoresistance in WTe2: in the quantum regime at low temperatures, it leads to quantum oscillations of the elastoresistance, that ranges between (-80) to 120 within a field range of only half a Tesla. In the semiclassical regime at intermediate temperatures, we find that the elastoresistance rapidly increases and changes sign in a magnetic field. We provide a semi-quantitative understanding of our experimental results using a combination of first-principle and analytical low-energy model calculations. Understanding bulk properties of TMDCs under uniaxial strain is an important stepping stone toward strain engineering of 2D TMDCs.</p>
dc.description.comments <p>This is a pre-print of the article Jo, Na Hyun, Lin-Lin Wang, Peter P. Orth, Sergey L. Bud'ko, and Paul C. Canfield. "Phenomenal magneto-elastoresistance of WTe2: strain engineering of electronic and quantum transport properties." <em>arXiv preprint arXiv:1901.05090</em> (2019). Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/physastro_pubs/517/
dc.identifier.articleid 1524
dc.identifier.contextkey 15824498
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath physastro_pubs/517
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/57296
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/physastro_pubs/517/2019_OrthPeter_PhenomenalMagneto.pdf|||Sat Jan 15 00:45:13 UTC 2022
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Engineering Physics
dc.title Phenomenal magneto-elastoresistance of WTe2: strain engineering of electronic and quantum transport properties
dc.type article
dc.type.genre article
dspace.entity.type Publication
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