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Title: Superconductivity and charge density wave in ZrTe3–xSex

Charge density wave (CDW), the periodic modulation of the electronic charge density, will open a gap on the Fermi surface that commonly leads to decreased or vanishing conductivity. On the other hand superconductivity, a commonly believed competing order, features a Fermi surface gap that results in infinite conductivity. Here we report that superconductivity emerges upon Se doping in CDW conductor ZrTe3 when the long range CDW order is gradually suppressed. Superconducting critical temperature Tc(x) in ZrTe3–xSex (0 ≤ x ≤ 0.1) increases up to 4 K plateau for 0.04 ≤ x ≤ 0.07. Further increase in Se content results in diminishing Tc and filametary superconductivity. The CDW modes from Raman spectra are observed in x = 0.04 and 0.1 crystals, where signature of ZrTe3 CDW order in resistivity vanishes. As a result, the electronic-scattering for high Tc crystals is dominated by local CDW fluctuations at high temperatures, the resistivity is linear up to highest measured T = 300 K and contributes to substantial in-plane anisotropy.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [2] ;  [4] ;  [5] ;  [6] ;  [7] ;  [2] ;  [6] ;  [6] ;  [3] ;  [6]
  1. Chinese Academy of Sciences and Univ. of Science and Technology of China, Hefei (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Chinese Academy of Sciences and Univ. of Science and Technology of China, Hefei (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Maryland, College Park, MD (United States)
  5. Chinese Academy of Sciences and Univ. of Science and Technology of China, Hefei (China); Condensed Matter Physics and Materials Science Dept., Upton, NY (United States)
  6. Chinese Academy of Sciences and Univ. of Science and Technology of China, Hefei (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
  7. Brookhaven National Lab. (BNL), Upton, NY (United States); Tianjin Univ. of Technology, Tianjin (China)
Publication Date:
OSTI Identifier:
1324285
Report Number(s):
BNL--112533-2016-JA
Journal ID: ISSN 2045-2322; R&D Project: PM016; MA015MACA; KC0201050; KC0201010
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY