Identifying the fingerprints of topological states by tuning magnetoresistance in a semimetal: the case of topological half-Heusler Pt1-xAuxLuSb
| Autor: | Shouvik Chatterjee, Felipe Crasto de Lima, John A. Logan, Yuan Fang, Hadass Inbar, Aranya Goswami, Connor Dempsey, Jason Dong, Shoaib Khalid, Tobias Brown-Heft, Yu-Hao Chang, Taozhi Guo, Daniel J. Pennachio, Nathaniel Wilson, Shalinee Chikara, Alexey Suslov, Alexei V. Fedorov, Dan Read, Jennifer Cano, Anderson Janotti, Christopher J. Palmstrøm |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter - Materials Science
Physics and Astronomy (miscellaneous) Condensed Matter - Mesoscale and Nanoscale Physics 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Materials Science 02 engineering and technology 021001 nanoscience & nanotechnology 010306 general physics 0210 nano-technology 01 natural sciences |
| Zdroj: | Physical Review Materials, vol 5, iss 12 |
| DOI: | 10.48550/arxiv.2012.12633 |
| Popis: | Topological materials often exhibit remarkably linear, non-saturating magnetoresistance (LMR), which is both of scientific and technological importance. However, the role of topologically non-trivial states in the emergence of such a behaviour has eluded clear demonstration in experiments. Here, by reducing the coupling between the topological surface states (TSS) and the bulk carriers we controllably tune the LMR behavior in Pt1-xAuxLuSb into distinct plateaus in Hall resistance, which we show arise from a quantum Hall phase. This allowed us to reveal how smearing of the Landau levels, which otherwise give rise to a quantum Hall phase, results in an LMR behavior due to strong interaction between the TSS with a positive g-factor and the bulk carriers. We establish that controlling the coupling strength between the surface and the bulk carriers in topological materials can bring about dramatic changes in their magnetotransport behavior. In addition, our work outlines a strategy to reveal macroscopic physical observables of TSS in compounds with a semi-metallic bulk band structure, as is the case in multi-functional Heusler compounds, thereby opening up opportunities for their utilization in hybrid quantum structures. Comment: 11 pages, 5 figures. Supplementary Material contains 6 sections and 16 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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