TY - JOUR
T1 - Raman study on quenched YBa2Cu3O7-σ single crystals
T2 - Evidence of charge transfer during oxygen ordering on room temperature annealing
AU - Matsuishi, Kiyoto
AU - Tao, Yuan Kai
AU - Feng, Hung Su
AU - Hor, Pei Herng
AU - Chu, Ching Wu
N1 - Funding Information:
quench, Raman scattering spectra (zz) were ~neasured at room temperature. We assume that the oxygen contents did not change on room temperature annealing. 2 This work is supported in part by the NSF Low Temperature Physics Program Grant No. DMR 86-126539, DARPA Grant No. MDA 972-88-G-002, NASA Grant No. NAGW-977, Texas Center for Superconductivitya t the University of Houston, and the T. L. L. Temple Foundation.
PY - 1991/12/1
Y1 - 1991/12/1
N2 - The Raman spectra of quenched YBa2Cu3O7-σ single crystals have been measured as a function of time in order to obtain information about oxygen ordering on room temperature annealing. It is found that the Raman frequency of the bridging oxygen (04) vibration mode increases with time on room temperature annealing, in coincidence with an increase in Tc. The observation is attributed to a change in the charge distribution in Cu2-O4-Cul complexes, resulting from a charge transfer caused by oxygen vacancy ordering.
AB - The Raman spectra of quenched YBa2Cu3O7-σ single crystals have been measured as a function of time in order to obtain information about oxygen ordering on room temperature annealing. It is found that the Raman frequency of the bridging oxygen (04) vibration mode increases with time on room temperature annealing, in coincidence with an increase in Tc. The observation is attributed to a change in the charge distribution in Cu2-O4-Cul complexes, resulting from a charge transfer caused by oxygen vacancy ordering.
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U2 - 10.1016/0921-4534(91)91637-J
DO - 10.1016/0921-4534(91)91637-J
M3 - Article
AN - SCOPUS:0026375567
SN - 0921-4534
VL - 185-189
SP - 827
EP - 828
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - PART 2
ER -