SLOPE DISCONTINUITY AND FLUCTUATION OF LATTICE EXPANSION NEAR TC IN UNTWINNED YBA2CU3O7-DELTA SINGLE-CRYSTALS

被引：59

作者：

YOU, H ^{[1
]}

WELP, U ^{[1
]}

FANG, Y ^{[1
]}

机构：

[1] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCOND,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.43.3660

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal lattice expansion of untwinned YBa2Cu3O7-delta single crystals is measured from 10 to 300 K with a high-resolution x-ray-diffraction technique on beam-line X22B at the National Synchrotron Light Source. All the unit-cell parameters (a, b, c, and volume) show unexpectedly large slope discontinuities near T(c) and possible strong fluctuations over a wide temperature region (80 < T < 120 K). Possible implications for the nature of the superconducting mechanism are discussed.

引用

页码：3660 / 3663

页数：4

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