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ID 18778
file
creator
Yoshida, Koji
Nakamura, Fumihiko
Goko, Tatsuo
Fujita, Toshizo
Maeno, Yoshiteru
Mori, Yasumitsu
NishiZaki, Shuji
abstract
We investigated pressure dependence of the electrical resistivity of the only copper-free layered-perovskite superconductor Sr2RuO4. The characteristic temperature TM, where the out-of-plane resistivity pc changes from metallic behavior to nonmetallic behavior with increasing temperature, increases with hydrostatic pressure. In contrast, the absolute value of pc at TM is almost independent of pressure. Such a change over in pc is ascribable to the crossover from the diffusion process of quasiparticles between the adjacent layers to the thermally assisted hopping process. The pressure effects on pc are possibly characterized by the enhanced transfer integral along the c axis by pressure. On the other hand, in the temperature dependence of the in-plane resistivity, we observed an intriguing hump that appears at low T less than TM in the pressure range from 1.5 to 5 GPa, and vanishes on applying higher pressure. This behavior may be comprehensible from the view of the two-dimensional ferromagnetic spin fluctuations enhanced by pressure.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 58
issue
Issue 22
start page
15 062
end page
15 066
date of issued
1998-12-01
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) 1998 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter