Weak localization in FeSe1-xTex superconducting thin films
(2012) In Superconductor Science & Technology 25(3).- Abstract
- We have investigated the magneto-resistivity (MR) of FeSe1-xTex superconducting films on MgO substrate. The MR of pure FeSe and slightly Te-substituted films demonstrates regular Lorentz-type magnetic field dependence, MR similar to B-2. In highly Te-substituted samples, however, negative MR contribution due to the weak-localization effect gradually dominates at low temperature, which is consistent with the evolution of the temperature dependence of resistivity from a metallic to a weakly semiconductor-like behavior. Furthermore, the negative MR weakens and turns positive as temperature approaches the superconducting transition temperature, which is evidence for the Maki-Thompson correction in the weak-localization regime. The experimental... (More)
- We have investigated the magneto-resistivity (MR) of FeSe1-xTex superconducting films on MgO substrate. The MR of pure FeSe and slightly Te-substituted films demonstrates regular Lorentz-type magnetic field dependence, MR similar to B-2. In highly Te-substituted samples, however, negative MR contribution due to the weak-localization effect gradually dominates at low temperature, which is consistent with the evolution of the temperature dependence of resistivity from a metallic to a weakly semiconductor-like behavior. Furthermore, the negative MR weakens and turns positive as temperature approaches the superconducting transition temperature, which is evidence for the Maki-Thompson correction in the weak-localization regime. The experimental data can be described very well by the weak-localization theory with the existence of scattering by some magnetic moments. The fitting parameters demonstrate that disorder most likely comes from the excess iron. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2390868
- author
- Chang, H. H. ; Luo, J. Y. ; Wu, C. T. ; Hsu, F. C. ; Huang, T. W. ; Wu, Phillip LU ; Wu, M. K. and Wang, M. J.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Superconductor Science & Technology
- volume
- 25
- issue
- 3
- article number
- 035004
- publisher
- IOP Publishing
- external identifiers
-
- wos:000300607500004
- scopus:84863169465
- ISSN
- 0953-2048
- DOI
- 10.1088/0953-2048/25/3/035004
- language
- English
- LU publication?
- yes
- id
- 745c3aed-658a-4182-a0d8-b86cb77c1d8c (old id 2390868)
- date added to LUP
- 2016-04-01 14:53:41
- date last changed
- 2022-02-19 21:25:43
@article{745c3aed-658a-4182-a0d8-b86cb77c1d8c, abstract = {{We have investigated the magneto-resistivity (MR) of FeSe1-xTex superconducting films on MgO substrate. The MR of pure FeSe and slightly Te-substituted films demonstrates regular Lorentz-type magnetic field dependence, MR similar to B-2. In highly Te-substituted samples, however, negative MR contribution due to the weak-localization effect gradually dominates at low temperature, which is consistent with the evolution of the temperature dependence of resistivity from a metallic to a weakly semiconductor-like behavior. Furthermore, the negative MR weakens and turns positive as temperature approaches the superconducting transition temperature, which is evidence for the Maki-Thompson correction in the weak-localization regime. The experimental data can be described very well by the weak-localization theory with the existence of scattering by some magnetic moments. The fitting parameters demonstrate that disorder most likely comes from the excess iron.}}, author = {{Chang, H. H. and Luo, J. Y. and Wu, C. T. and Hsu, F. C. and Huang, T. W. and Wu, Phillip and Wu, M. K. and Wang, M. J.}}, issn = {{0953-2048}}, language = {{eng}}, number = {{3}}, publisher = {{IOP Publishing}}, series = {{Superconductor Science & Technology}}, title = {{Weak localization in FeSe1-xTex superconducting thin films}}, url = {{http://dx.doi.org/10.1088/0953-2048/25/3/035004}}, doi = {{10.1088/0953-2048/25/3/035004}}, volume = {{25}}, year = {{2012}}, }