TY - JOUR
T1 - Oxygen K-edge fine structure of Tl2Ba2Can-1CuxO2n+4 studied by electron energy loss spectroscopy
AU - Shindo, D.
AU - Hiraga, K.
AU - Nakajima, S.
AU - Kikuchi, M.
AU - Syono, Y.
AU - Hojou, K.
AU - Soga, T.
AU - Furuno, S.
AU - Otsu, H.
N1 - Funding Information:
The authors wish to thank Prof. Y. Muto and Prof. M. Tachiki, Institute for Materials Research, To-hoku University for their interesta nd discussion.T he work was supportedb y a Grant-in-Aid for Scientific Research on Priority Areas “Mechanism of Superconductivity”.
PY - 1990/2/1
Y1 - 1990/2/1
N2 - The fine structures of the oxygen K-edge in Tl2Ba2Can-1CunO2n+4 (n=1-3) with double Tl-O layers were investigated by electron energy loss spectroscopy (EELS). A peak at 528 eV becomes smaller with the increase of the number of Cu-O layers, n, in Tl2Ba2Can-1CunO2n+4, indicating that the average hole content in a Cu-O bonding decreases with the increase of n. Reducing the hole content in Tl2Ba2Cu1O6 by replacing a part of Ba(+2) with La(+3), the peak at 528 eV becomes smaller and Tc of the compounds increases up to 55 K. It was shown that holes of Tl2Ba2Cu1O6 are overdoped. The present EELS results were compared with the previous results of Tl1Ba2Can-1CunO2n+3 with single Tl-O layers.
AB - The fine structures of the oxygen K-edge in Tl2Ba2Can-1CunO2n+4 (n=1-3) with double Tl-O layers were investigated by electron energy loss spectroscopy (EELS). A peak at 528 eV becomes smaller with the increase of the number of Cu-O layers, n, in Tl2Ba2Can-1CunO2n+4, indicating that the average hole content in a Cu-O bonding decreases with the increase of n. Reducing the hole content in Tl2Ba2Cu1O6 by replacing a part of Ba(+2) with La(+3), the peak at 528 eV becomes smaller and Tc of the compounds increases up to 55 K. It was shown that holes of Tl2Ba2Cu1O6 are overdoped. The present EELS results were compared with the previous results of Tl1Ba2Can-1CunO2n+3 with single Tl-O layers.
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U2 - 10.1016/0921-4534(90)90211-V
DO - 10.1016/0921-4534(90)90211-V
M3 - Article
AN - SCOPUS:0025388540
VL - 165
SP - 321
EP - 324
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3-4
ER -