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Title: Fragile structural transition in Mo 3Sb 7

Mo 3Sb 7 single crystals lightly doped with Cr, Ru, or Te are studied in order to explore the interplay between superconductivity, magnetism, and the cubic-tetragonal structural transition. The structural transition at 53 K is extremely sensitive to Ru or Te substitution which introduces additional electrons, but robust against Cr substitution. We observed no sign of a structural transition in superconducting Mo 2.91Ru 0.09Sb 7 and Mo 3Sb 6.975Te 0.025. In contrast, 3 at.% Cr doping only slightly suppresses the structural transition to 48 K while leaving no trace of superconductivity above 1.8 K. Analysis of magnetic properties suggests that the interdimer interaction in Mo 3Sb 7 is near a critical value and essential for the structural transition. Futhermore, all dopants suppress the superconductivity of Mo 3Sb 7. The tetragonal structure is not necessary for superconductivity.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 6; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1210153
Alternate Identifier(s):
OSTI ID: 1209842

Yan, Jiaqiang -Q., McGuire, Michael A, May, Andrew F, Parker, David S., Mandrus, D. G., and Sales, Brian C.. Fragile structural transition in Mo3Sb7. United States: N. p., Web. doi:10.1103/PhysRevB.92.064507.
Yan, Jiaqiang -Q., McGuire, Michael A, May, Andrew F, Parker, David S., Mandrus, D. G., & Sales, Brian C.. Fragile structural transition in Mo3Sb7. United States. doi:10.1103/PhysRevB.92.064507.
Yan, Jiaqiang -Q., McGuire, Michael A, May, Andrew F, Parker, David S., Mandrus, D. G., and Sales, Brian C.. 2015. "Fragile structural transition in Mo3Sb7". United States. doi:10.1103/PhysRevB.92.064507. https://www.osti.gov/servlets/purl/1210153.
@article{osti_1210153,
title = {Fragile structural transition in Mo3Sb7},
author = {Yan, Jiaqiang -Q. and McGuire, Michael A and May, Andrew F and Parker, David S. and Mandrus, D. G. and Sales, Brian C.},
abstractNote = {Mo3Sb7 single crystals lightly doped with Cr, Ru, or Te are studied in order to explore the interplay between superconductivity, magnetism, and the cubic-tetragonal structural transition. The structural transition at 53 K is extremely sensitive to Ru or Te substitution which introduces additional electrons, but robust against Cr substitution. We observed no sign of a structural transition in superconducting Mo2.91Ru0.09Sb7 and Mo3Sb6.975Te0.025. In contrast, 3 at.% Cr doping only slightly suppresses the structural transition to 48 K while leaving no trace of superconductivity above 1.8 K. Analysis of magnetic properties suggests that the interdimer interaction in Mo3Sb7 is near a critical value and essential for the structural transition. Futhermore, all dopants suppress the superconductivity of Mo3Sb7. The tetragonal structure is not necessary for superconductivity.},
doi = {10.1103/PhysRevB.92.064507},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 6,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}