In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 26, No. 4A ( 1987-04-01), p. L460-
Abstract:
The high- T c superconductor Ba 2 Y 1 Cu 3 O 7 with the oxygen-deficient perovskite structure was prepared almost in a single-phase with T co of 125 K, T c of 95 and T ce of 93 K. The XPS valence-band spectrum showed a relative large N ( E F ), density of states at the Fermi level. The XPS Cu 2p 3/2 peak is divided into three peaks which are attributed to monovalent, bivalent and trivalent Cu ions with the concentration ratio of 1:2:1. These results and the peculiar lattice structure lead to the T c enhancement mechanism from the plasmon or exciton origin due to the Cu d-hole creation and annihilation resonating with vibration modes of the CuO 5 and CuO 4 clusters. The T c value was calculated.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.26.L460
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1987
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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