O-1s x-ray near-edge absorption spectroscopy studies of La1.5-xCaxBa1.5Cu3Oy and La1.5CaxBa1.5-xCu3Oy

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題名:	O-1s x-ray near-edge absorption spectroscopy studies of La1.5-xCaxBa1.5Cu3Oy and La1.5CaxBa1.5-xCu3Oy
作者:	Song, Y. F.;Chang, C. N.;Kao, H.-C. I.;Hsieh, C. H.;Liu, H. F.;Lin, H. D.;Huang, W. W.
貢獻者:	淡江大學化學學系
日期:	1999-08
上傳時間:	2013-07-09 15:28:20 (UTC+8)
出版者:	College Park: American Physical Society
摘要:	The O-1s x-ray near-edge-absorption spectra of La1.52xCaxBa1.5Cu3Oy and La1.5CaxBa1.52xCu3Oy have been measured by using synchrotron radiation. Their spectral features of the pre-edge spectra indicate that there is an electronic structure change similar to the effect of Pr in Y12xPrxBa2Cu3O7-d ; the holes on the CuO2 planes increase with the doping concentration of Ca ions; not all the excess oxygen ~for y^7.0! in the basal plane supply holes; and there is a sign of increasing, rather than decreasing, the holes around the apical oxygen O(4) with the increase of the replacement of Ba by La on the Ba sites, an indication of a redistribution of holes.
關聯:	Physical Review B (Condensed Matter and Materials Physics) 60(6), pp.4357-4362
DOI:	10.1103/PhysRevB.60.4357
顯示於類別:	[化學學系暨研究所] 期刊論文

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