Quadratic to linear magnetoresistance tuning in TmB4
| Autor: | B. Sriram Shastry, Christos Panagopoulos, Tai Kong, Sreemanta Mitra, John Y. Shin, Pinaki Sengupta, Paul C. Canfield, Sai Sunku, Jin Quan Ng, Jeremy Goh Swee Kang |
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| Přispěvatelé: | School of Physical and Mathematical Sciences |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Strongly Correlated Electrons (cond-mat.str-el) Anisotropic Magnetoresistance Magnetoresistance Electronic correlation Condensed matter physics FOS: Physical sciences Fermi surface Science::Physics [DRNTU] 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Semimetal Condensed Matter - Strongly Correlated Electrons Topological insulator 0103 physical sciences Antiferromagnetism Magnetotransport Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Anisotropy Saturation (magnetic) |
| Zdroj: | Physical Review B. 99 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.99.045119 |
| Popis: | The 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, two-dimensional electron gas (2DEG) show positive, non-saturating 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. 14 pages, 5 figures, Accepted version of PRB |
| Databáze: | OpenAIRE |
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