In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 37, No. 8R ( 1998-08-01), p. 4346-
Abstract:
We describe a novel technique capable of controlling the oxygen content
of YBa 2 Cu 3 O x (YBCO) films in a precise and reversible
manner. The temperature dependence of resistivity and the distinct two-plateau behavior in critical temperature T co versus oxygen content
plot of these films are consistent with those observed in the bulk and single crystals of YBCO. The O 1 s and Cu 2 p absorption spectra of
these films were measured by polarization-dependent X-ray absorption spectroscopy (XAS). The intensity variations of the pre-edge peaks as a function of oxygen
content are discussed. We also used these films to systematically study the electron-phonon coupling strength and the position of Fermi level by using a
femtosecond pump-probe technique. A clear sign-reversal of the transient reflectivity, which was consistently explained by the thermomodulation model,
was observed. Both of these optical measurements support the idea that the electronic structure of YBCO cuprates is based on the charge transfer model
with hybridization between the Cu and O sites.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.37.4346
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1998
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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