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25 April 2024

» arxiv » 1611.8112

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Nontrivial Berry phase and type II Dirac transport in layered material PdTe2
Fucong Fei ; Xiangyan Bo ; Rui Wang ; Bin Wu ; Dongzhi Fu ; Ming Gao ; Hao Zheng ; Fengqi Song ; Xiangang Wan ; Baigeng Wang ; Xuefeng Wang ; Guanghou Wang ;
Date:	24 Nov 2016
Abstract:	The de Haas-van Alphen oscillations are observed and reveal 6 electronic pockets in the magnetization measurement of the layered crystal PdTe2. The small pocket with an area of 0.079nm-2 shows a topologically-nontrivial Berry phase, although it doesn’t belong to the Dirac cone as revealed by the calculations. This is characteristic for the type-II Dirac fermions. The superconductivity appears at 1.9K and the upper critical field when Ixc is 3 times larger than that when I//c. Considering the device performance and the coexistence of nontrivial Berry phase and superconductivity,we suggest PdTe2 is an improved platform to host the topological superconductor.
Source:	arXiv, 1611.8112
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