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Title: Ultrahigh pressure superconductivity in molybdenum disulfide

Abstract

Superconductivity commonly appears under pressure in charge densit wave (CDW)-bearing transition metal dichalcogenides (TMDs) 1,2, but ha emerged so far only via either intercalation with electron donors 3 or electrostati doping 4 in CDW-free TMDs. Theoretical calculations have predicted that th latter should be metallized through bandgap closure under pressure 5,6, bu superconductivity remained elusive in pristine 2H-MoS 2 upon substantia compression, where a pressure of up to 60 GPa only evidenced the metalli state 7,8. Here we report the emergence of superconductivity in pristine 2H-MoS at 90 GPa. The maximum onset transition temperature T c (onset) of 11.5 K, th highest value among TMDs and nearly constant from 120 up to 200 GPa, is wel above that obtained by chemical doping3 but comparable to that obtained b electrostatic doping4. T c (onset) is more than an order of magnitude larger tha present theoretical expectations, raising questions on either the curren calculation methodologies or the mechanism of the pressure-induced pairin state. Lastly, our findings strongly suggest further experimental and theoretical effort directed toward the study of the pressure-induced superconductivity in all CDWfre TMDs.

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [5];  [1];  [6];  [3];  [7];  [8]
  1. Chinese Academy of Sciences (CAS), Hefei (China)
  2. Luoyang Normal Univ., Luoyang (China)
  3. Univ. of Nevada, Las Vegas, NV (United States)
  4. Univ. of Tokyo, Tokyo (Japan)
  5. Chinese Academy of Sciences (CAS), Hefei (China); Nanjing Univ., Nanjing (China)
  6. Jilin Univ., Changchun (China)
  7. Osaka Univ., Osaka (Japan)
  8. Univ. of Tokyo, Tokyo (Japan); RIKEN Center for Emergent Matter Science (CEMS), Wako (Japan)
Publication Date:
Research Org.:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1332359
Report Number(s):
arXiv:1503.05331
DOE Contract Number:  
NA0001982
Resource Type:
Other
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chi, Zhenhua, Yen, Feihsiang, Peng, Feng, Zhu, Jinlong, Zhang, Yijin, Chen, Xuliang, Yang, Zhaorong, Liu, Xiaodi, Ma, Yaming, Zhao, Yusheng, Kagayama, Tomoko, and Iwasa, Yoshihiro. Ultrahigh pressure superconductivity in molybdenum disulfide. United States: N. p., 2015. Web.
Chi, Zhenhua, Yen, Feihsiang, Peng, Feng, Zhu, Jinlong, Zhang, Yijin, Chen, Xuliang, Yang, Zhaorong, Liu, Xiaodi, Ma, Yaming, Zhao, Yusheng, Kagayama, Tomoko, & Iwasa, Yoshihiro. Ultrahigh pressure superconductivity in molybdenum disulfide. United States.
Chi, Zhenhua, Yen, Feihsiang, Peng, Feng, Zhu, Jinlong, Zhang, Yijin, Chen, Xuliang, Yang, Zhaorong, Liu, Xiaodi, Ma, Yaming, Zhao, Yusheng, Kagayama, Tomoko, and Iwasa, Yoshihiro. Wed . "Ultrahigh pressure superconductivity in molybdenum disulfide". United States. doi:. https://www.osti.gov/servlets/purl/1332359.
@article{osti_1332359,
title = {Ultrahigh pressure superconductivity in molybdenum disulfide},
author = {Chi, Zhenhua and Yen, Feihsiang and Peng, Feng and Zhu, Jinlong and Zhang, Yijin and Chen, Xuliang and Yang, Zhaorong and Liu, Xiaodi and Ma, Yaming and Zhao, Yusheng and Kagayama, Tomoko and Iwasa, Yoshihiro},
abstractNote = {Superconductivity commonly appears under pressure in charge densit wave (CDW)-bearing transition metal dichalcogenides (TMDs)1,2, but ha emerged so far only via either intercalation with electron donors3 or electrostati doping4 in CDW-free TMDs. Theoretical calculations have predicted that th latter should be metallized through bandgap closure under pressure5,6, bu superconductivity remained elusive in pristine 2H-MoS2 upon substantia compression, where a pressure of up to 60 GPa only evidenced the metalli state7,8. Here we report the emergence of superconductivity in pristine 2H-MoS at 90 GPa. The maximum onset transition temperature Tc(onset) of 11.5 K, th highest value among TMDs and nearly constant from 120 up to 200 GPa, is wel above that obtained by chemical doping3 but comparable to that obtained b electrostatic doping4. Tc(onset) is more than an order of magnitude larger tha present theoretical expectations, raising questions on either the curren calculation methodologies or the mechanism of the pressure-induced pairin state. Lastly, our findings strongly suggest further experimental and theoretical effort directed toward the study of the pressure-induced superconductivity in all CDWfre TMDs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 18 00:00:00 EDT 2015},
month = {Wed Mar 18 00:00:00 EDT 2015}
}