MONTE-CARLO SIMULATION OF LOW-TEMPERATURE PHASE-DIAGRAMS OF YBA2CU3O6+X

被引:4
作者
KHANNA, R [1 ]
WELBERRY, TR [1 ]
ANANTHAKRISHNA, G [1 ]
机构
[1] INDIAN INST SCI, MAT RES CTR, BANGALORE 560012, KARNATAKA, INDIA
来源
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1992年 / 197卷 / 1-2期
关键词
D O I
10.1016/0921-4534(92)90234-4
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report the results of Monte Carlo simulation of oxygen ordering in the oxygen deficient portion (x < 0.5) of YBa2Cu3O6+x at low temperatures. We find qualitative agreement among cluster - variation, Monte Carlo and transfer matrix methods. However, low temperature and ground state simulations clearly indicate the presence of a tetragonal phase. There is also evidence for two second order phase transition lines separating the tetragonal and the "double cell" ortho II phase. The effect of decreasing the inter-chain repulsion on oxygen ordering has also been investigated.
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页码:57 / 63
页数:7
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