用孤子统计方法计算氧化物超导体的临界温度

应用科学学报 ›› 1991, Vol. 9 ›› Issue (3): 276-279.

用孤子统计方法计算氧化物超导体的临界温度

林家逖¹, 张凌云²

1. 天津大学;
2. 河北工学院

收稿日期:1989-11-24 修回日期:1990-07-24 出版日期:1991-09-30 发布日期:1991-09-30

CALCULATION OF CRITICAL TEMPERATURE FOR OXIDE SUPERCONDUCTORS BASED ON SOLITONSTATISTICS OF φ⁴FIELD

LIN JIATIH¹, ZHANG LINGYUN²

1. Tianjin University;
2. Hebei Institute of Engineering

Received:1989-11-24 Revised:1990-07-24 Online:1991-09-30 Published:1991-09-30

摘要/Abstract

摘要： 自发现Ba-La-Cu-O高温超导体的超导性以来^[1],人们一直在探求氧化物超导体的导电机制,其中孤子超导模型是令人注目的一种。在李政道等人提出的非拓扑型孤子系统会出现类似的Bose凝聚后^[2],苏联Davydov在分析Y-Ba-Cu-O材料的导电结构时指出^[3]:这种导电过程可用准一维链式模型来处理。

关键词: 孤子对, Davydov模型, 超导临界温度

Abstract: Based on Davydov's bisoliton theory on high-superconductors and a complex transformation, we prove that the displacement in the above theory satisfies the φ⁴ field form at low excitation approximation. The critical temperature is studied by the soliton statistics method at high-temperature approximation. The fact that the theoretical values approach the experimental values in superconductors YBa₂Ou₃O_7-δ and La_1-δSr_0.2CuO₄ supports the Davydov theory.

Key words: the critical temperature of superconductor, Davydov model, bisoliton

林家逖, 张凌云. 用孤子统计方法计算氧化物超导体的临界温度[J]. 应用科学学报, 1991, 9(3): 276-279.

LIN JIATIH, ZHANG LINGYUN. CALCULATION OF CRITICAL TEMPERATURE FOR OXIDE SUPERCONDUCTORS BASED ON SOLITONSTATISTICS OF φ⁴FIELD[J]. Journal of Applied Sciences, 1991, 9(3): 276-279.