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• W4385693257 startingPage "465701" @default.
• W4385693257 abstract "Abstract We propose SnBi 2 Te 4 to be a novel topological quantum material exhibiting temperature ( T ) mediated transitions between rich electronic phases. Our combined theoretical and experimental results suggest that SnBi 2 Te 4 goes from a low- T semimetallic phase to a high- T (room temperature) insulating phase via an intermediate metallic phase. Single crystals of SnBi 2 Te 4 are characterized by various experimental probes including synchrotron based x-ray diffraction, magnetoresistance, Hall effect, Seebeck coefficient and magnetization. X-ray diffraction data confirms an anomalous thermal expansion of the unit cell volume below ∼100 K, which significantly affects the bulk band structure and hence the transport properties. Simulated surface states are found to be topologically robust with varying T . This indirectly supports the experimentally observed paramagnetic singularity in the entire T -range. The proposed coexistence of such rich phases is a rare occurrence, yet it facilitates a fertile ground to tune them in a material driven by structural changes." @default.
• W4385693257 created "2023-08-10" @default.
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• W4385693257 date "2023-08-23" @default.
• W4385693257 modified "2023-09-26" @default.
• W4385693257 title "Unconventional electronic phase transition in SnBi₂Te₄: role of anomalous thermal expansion" @default.
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