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ID 15042
file
creator
Kashiwaya, S.
Eisaki, H.
Kashiwaya, H.
Tsuchiura, H.
Tanaka, Y.
Fujita, K.
Uchida, S.
NDC
Physics
abstract
Nanoscale electronic inhomogeneity in optimally doped single-layer Bi2 Sr1.6 L0.4 Cu O6+δ, (L -Bi2201, L=La and Gd) as well as bilayer Bi2 Sr2 Ca Cu2 O8+δ (Bi2212), superconductors has been investigated by the low-temperature scanning-tunneling-microscopy and spectroscopy. The inhomogeneous gap structures are observed above and below Tc on Gd-Bi2201. Increasing the out-of-plane disorder which is controlled by mismatch of the ionic radius between Sr and Ln results in the enhancement of pseudogap region with suppressed coherence peaks in the conductance spectrum, making the gap average larger and the gap distribution wider. The degree of electronic inhomogeneity measured by the distribution width of the gap amplitude is shown to have a correlation with Tc in optimally doped Bi2201 and Bi2212.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 74
issue
Issue 9
start page
094503
date of issued
2006
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 American Physical Soceity
relation url
department
Graduate School of Integrated Arts and Sciences