Inconsistent pressure effect on superconducting transition temperature and volume in Fe1+yTe1-xSex single crystals

Details Inconsistent pressure effect on superconducting transition temperature and volume in Fe1+yTe1-xSex single crystals Inconsistent pressure effect on superconducting transition temperature and volume in Fe1+yTe1-xSex single crystals

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12f3019l&link_type=abstract

New Journal of Physics, Volume 12, Issue 6, pp. 063019 (2010).

Physics

5

Scientific paper

The role of Se in determining the superconductivity of Fe1+yTe1-xSex is still unclear. In this paper, we examine the chemical effect generated by Se substitution by applying external pressure on Fe1+yTe1-xSex single crystals. With increasing pressure, the superconducting volume increases; however, the onset temperature of the superconducting diamagnetic signal, Tcmag, does not change monotonically. The inconsistent pressure effect on superconducting volume and Tcmag is in agreement with Se substitution, which suggests that the chemical pressure effect dominates the superconductivity. Our results also imply that the superconducting and magnetic phases coexist in the form of phase separation.

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