Review of nanoscale layered transition metal chalcogenide superconductors

¹School of Material Science and Engineering, Sun Yat-Sen University, No. 135, Xingang Xi Road, Guangzhou, 510275, P. R. China

²Key Lab Polymer Composite & Functional Materials, Sun Yat-Sen University, No. 135, Xingang Xi Road, Guangzhou, 510275, P. R. China 

Adv. Mater. Lett., 2019, 10 (3), pp 152-163

DOI: 10.5185/amlett.2019.2175

Publication Date (Web): Dec 31, 2018

Copyright © IAAM-VBRI Press

E-mail: luohx7@mail.sysu.edu.cn

Abstract

Here we summarized the nanoscale layered transition metal chalcogenide superconductors, mainly based on the experimental results. In transition-metal chalcogenides the interplay between strong electron-electron and electron-phonon interactions produces a wide variety of instability ranging from charge density wave to superconducting state. The majority of bulk transition-metal dichalcogenides T_cs are normally between 2 and 4 K. At present, superconducting transition-metal chalcogenides generally show low transition temperature (T_c < 10 K). Fe based transition-metal chalcogenides have certain higher T_c (in the range of 10 ~ 50 K). As have been reported, nano-transition-metal chalcogenides may be one of the routes to improve the superconducting transition temperature. In this review, we would like to give a brief introduction of superconductor development and crystal structure of transition-metal chalcogenides. Furthermore, we will describe major synthesis and physical properties of nano-transition-metal chalcogenides. Finally, recent status and outlook of superconductor based on nano-transition-metal chalcogenides are discussed. 

Keywords

Superconductor, transition-metal chalcogenide, nanoscale.