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ID 14223
file
creator
Hata, Satomi
NDC
Physics
abstract
We examine superconductivity in layered systems with large Fermi-surface splitting due to coexisting ferromagnetic layers. In particular, the hybrid ruthenate-cuprate compound RuSr2GdCu2O8 is examined on the coexistence of the superconductivity and the ferromagnetism, which has been observed recently. We calculate critical fields of the superconductivity taking into account the Fulde-Ferrell-Larkin-Ovchinnikov state in a model with Fermi-surfaces which shapes are similar to those obtained by a band calculation. It is shown that the critical field is enhanced remarkably due to a Fermi-surface effect, and can be high enough to make the coexistence possible in a microscopic scale. We also clarify the direction of the spatial oscillation of the order parameter, which may be observed by scanning tunneling microscope experiments.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 62
issue
Issue 21
start page
14541
end page
14546
date of issued
2000
publisher
The American Physical Society
issn
1098-0121
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2000 The American Physical Society
relation url
department
Graduate School of Advanced Sciences of Matter