Fragile structural transition in Mo3Sb7

Yan, Jiaqiang -Q.; McGuire, Michael A; May, Andrew F; Parker, David S.; Mandrus, D. G.; Sales, Brian C.

doi:10.1103/PhysRevB.92.064507

Title: Fragile structural transition in Mo₃Sb₇

Journal Article · Mon Aug 10 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.064507· OSTI ID:1210153

Yan, Jiaqiang -Q. ^[1]; McGuire, Michael A ^[2]; May, Andrew F ^[2]; Parker, David S. ^[2]; Mandrus, D. G. ^[1]; Sales, Brian C. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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 Mo_2.91Ru_0.09Sb₇ and Mo₃Sb_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 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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1210153

Alternate ID(s):: OSTI ID: 1209842

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 6; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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