CHARGE FLUCTUATIONS IN HOBA2CU3OX (6-LESS-THAN-X-LESS-THAN-7) AND HOBA2CU4O8 AS STUDIED BY INELASTIC NEUTRON-SCATTERING

被引：4
|
作者：
MESOT, J [1 ]
FURRER, A [1 ]
机构：
[1] ETH ZURICH,CH-5232 VILLIGEN,SWITZERLAND
来源：
PHYSICA C | 1994年 / 235卷
关键词：
D O I：
10.1016/0921-4534(94)92043-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The line shapes of the lowest crystalline-electric-field (CEF) excitations of Ho3+ in HoBa2Cu3Ox (6 less than or equal to x less than or equal to 7) and HoBa2Cu4O8 turn out to be highly asymmetric for all the superconducting samples, while they remain Gaussian for the non-superconducting ones. Since these asymmetries increase with increasing oxygen content x, we believe that they are related to the level of doping of the CuO2 planes. A CEF model including low-energy charge fluctuations of the type Cu+2O-2+delta <-> (CuO-2)-O-+2+delta in the superconducting planes is able to reproduce quantitatively the observed asymmetries.
引用
收藏
页码：1639 / 1640
页数：2
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