Crystal orientation and thickness dependence of the superconducting transition temperature of tetragonal FeSe1-x thin films.


Journal Article

Superconductivity was recently found in the tetragonal phase FeSe. A structural transformation from tetragonal to orthorhombic (or monoclinic, depending on point of view) was observed at low temperature, but was not accompanied by a magnetic ordering as commonly occurs in the parent compounds of FeAs-based superconductors. Here, we report the correlation between structural distortion and superconductivity in FeSe(1-x) thin films with different preferred growth orientations. The films with preferred growth along the c axis show a strong thickness dependent suppression of superconductivity and low temperature structural distortion. In contrast, both properties are less affected in the films with (101) preferred orientation. These results suggest that the low temperature structural distortion is closely associated with the superconductivity of this material.

Full Text

Duke Authors

Cited Authors

  • Wang, MJ; Luo, JY; Huang, TW; Chang, HH; Chen, TK; Hsu, FC; Wu, CT; Wu, PM; Chang, AM; Wu, MK

Published Date

  • September 10, 2009

Published In

Volume / Issue

  • 103 / 11

Start / End Page

  • 117002 -

PubMed ID

  • 19792394

Pubmed Central ID

  • 19792394

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.103.117002


  • eng