ISSN:
1573-7357
Keywords:
74.25Fy
;
74.62Fj
;
74.72Dn
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Out-of-plane resistivity pc(T) of optimally-doped high-Tc superconductor La2−xSrxCuO4 has been investigated under hydrostatic pressure up to 8GPa. We found a drastic decrease in ϱc which reaches 50% at 8GPa. The large change of ϱc is understood as due to a small variation of the lattice parameter c. In comparison with a change of pc(T) estimated from a change of c due to thermal contraction, we conclude that the well known temperature-linear dependence of ϱc is apparent metallic one; essentially ϱc is nonmetallic over the whole temperature range, and can be described in terms of tunneling or quantum hopping conduction between CuO2 layers. Such tunneling conduction is enhanced by the scattering in the CuO2 plane at the oxygen defects which affect the in-plane resistivity only very weakly.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00768499
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