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dc.contributor.authorMitra, Sreemantaen
dc.contributor.authorKang, Jeremy Goh Sweeen
dc.contributor.authorShin, Johnen
dc.contributor.authorNg, Jin Quanen
dc.contributor.authorSunku, Sai Swaroopen
dc.contributor.authorKong, Taien
dc.contributor.authorCanfield, Paul C.en
dc.contributor.authorShastry, B. Sriramen
dc.contributor.authorSengupta, Pinakien
dc.contributor.authorPanagopoulos, Christosen
dc.identifier.citationMitra, S., Kang, J. G. S., Shin, J., Ng, J. Q., Sunku, S. S., Kong, T., . . . Panagopoulos, C. (2019). Quadratic to linear magnetoresistance tuning in TmB4. Physical Review B, 99(4), 045119-. doi:10.1103/PhysRevB.99.045119en
dc.description.abstractThe change of a material's electrical resistance (R) in response to an external magnetic field (B) provides subtle information for the characterization of its electronic properties and has found applications in sensor and storage related technologies. In good metals, Boltzmann's theory predicts a quadratic growth in magnetoresistance (MR) at low B and saturation at high fields. On the other hand, a number of nonmagnetic materials with weak electronic correlation and low carrier concentration for metallicity, such as inhomogeneous conductors, semimetals, narrow gap semiconductors and topological insulators, and two dimensional electron gas, show positive, nonsaturating linear magnetoresistance (LMR). However, observation of LMR in single crystals of a good metal is rare. Here we present low-temperature, angle-dependent magnetotransport in single crystals of the antiferromagnetic metal, TmB4. We observe large, positive, and anisotropic MR(B), which can be tuned from quadratic to linear by changing the direction of the applied field. In view of the fact that isotropic, single crystalline metals with large Fermi surface (FS) are not expected to exhibit LMR, we attribute our observations to the anisotropic FS topology of TmB4. Furthermore, the linear MR is found to be temperature independent, suggestive of quantum mechanical origin.en
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent7 p.en
dc.relation.ispartofseriesPhysical Review Ben
dc.rights© 2019 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.en
dc.subjectAnisotropic Magnetoresistanceen
dc.titleQuadratic to linear magnetoresistance tuning in TmB 4en
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.description.versionPublished versionen
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