GROUP-THEORETICAL ANALYSIS OF POSSIBLE STRUCTURAL PHASE-TRANSITIONS IN THE HIGH-TEMPERATURE SUPERCONDUCTORS

被引：2

作者：

ALEKSANDROV, KS ^{[1
]}

MISYUL, SV ^{[1
]}

IVANOVA, TI ^{[1
]}

SAKHNENKO, VP ^{[1
]}

CHECHIN, GM ^{[1
]}

机构：

[1] ROSTOV DON UNIV,DEPT PHYS,ROSTOV 344090,USSR

来源：

PHASE TRANSITIONS | 1990年 / 22卷 / 1-4期

关键词：

irreducible representation; order parameters; Structural phase transitions;

D O I：

10.1080/01411599008207227

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A group-theoretical analysis is performed for the complete condensation of order parameters at structural phase transitions (SPTs) in the high-temperature superconductors belonging to the D174h-I4/mmm space group in the high-symmetry phase. As a rule, such transformations are due to a successive softening of phonons with wave vectors k1— ½ b3 and k2= ½(b1— b3) belonging to the K13(X) star of the Brillouin zone of a tetragonal body-centered Bravais cell. SPTs in system La2-xBaxCUO4are considered in detail. © 1990, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：245 / 255

页数：11

共 26 条

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[2]

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[3]

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[6]

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[9]

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[10]

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