期刊
PHYSICAL REVIEW B
卷 95, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.014507
关键词
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资金
- U.S. Department of Energy (DOE) by Lawrence Livermore National Laboratory (LLNL) [DE-AC52- 07NA27344]
- DOE-NNSA [DE-NA0001974, DE-NA0002014]
- DOE-BES [DE-FG02-99ER45775]
- NSF
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
- Gordon and Betty Moore Foundation under the EPiQS program [GBMF 4412]
- ARO MURI on topological insulators [W911NF-12-1-0461]
Extreme magnetoresistance (XMR) in topological semimetals is a recent discovery which attracts attention due to its robust appearance in a growing number of materials. To search for a relation between XMR and superconductivity, we study the effect of pressure on LaBi. By increasing pressure, we observe the disappearance of XMR followed by the appearance of superconductivity at P approximate to 3.5 GPa. We find a region of coexistence between superconductivity and XMR in LaBi in contrast to other superconducting XMR materials. The suppression of XMR is correlated with increasing zero-field resistance instead of decreasing in-field resistance. At higher pressures, P approximate to 11 GPa, we find a structural transition from the face-centered cubic lattice to a primitive tetragonal lattice, in agreement with theoretical predictions. The relationship between extreme magnetoresistance, superconductivity, and structural transition in LaBi is discussed.
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