Pressure-induced a partial disorder and superconductivity in quasi-one-dimensional Weyl semimetal (NbSe4)2I

Pei C, Shi W, Zhao Y, Gao L, Gao J, Li Y, Zhu H, Zhang Q, Yu N, Li C, Cao W, Medvedev SA, Felser C, Yan B, Liu Z, Chen Y, Wang Z, Qi Y (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Materials Today Physics Elsevier

Book Volume: 21

Article Number: 100509

DOI: 10.1016/j.mtphys.2021.100509

Abstract

A search for the single material system that simultaneously exhibits topological phase and intrinsic superconductivity has been largely limited, although such a system is far more favorable especially for the quantum device applications. Except artificially engineered topological superconductivity in heterostructure systems, another alternative is to have superconductivity arising from the topological materials by pressure or other “clean” technology. Here, based on first-principles calculations, we first show that quasi-one-dimensional compound (NbSe4)2I represents a rare example of a chiral Weyl semimetal in which the set of symmetry-related Weyl points (WPs) exhibit the same chiral charge at a certain energy. The net chiral charge (NCC) of the below Fermi level EF (or a certain energy) can be tuned by pressure. In addition, a partial disorder induced by pressure accompanied with superconductivity emerges. Although amorphization of the iodine sub-lattice under high pressure, the one-dimensional NbSe4 chains in (NbSe4)2I remain intact and provide a superconducting channel in one dimension. Our combined theoretical and experimental research provide critical insight into a new phase of the one-dimensional system, in which distinctive phase transitions and correlated topological states emerge upon compression.

Involved external institutions

ShanghaiTech University / 上海科技大学 CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Weizmann Institute of Science IL Israel (IL)

How to cite

APA:

Pei, C., Shi, W., Zhao, Y., Gao, L., Gao, J., Li, Y.,... Qi, Y. (2021). Pressure-induced a partial disorder and superconductivity in quasi-one-dimensional Weyl semimetal (NbSe4)2I. Materials Today Physics, 21. https://doi.org/10.1016/j.mtphys.2021.100509

MLA:

Pei, Cuiying, et al. "Pressure-induced a partial disorder and superconductivity in quasi-one-dimensional Weyl semimetal (NbSe4)2I." Materials Today Physics 21 (2021).

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