ORDER PARAMETER COUPLING AND CHIRALITY OF DOMAIN-WALLS

被引:133
作者
HOUCHMANDZADEH, B [1 ]
LAJZEROWICZ, J [1 ]
SALJE, E [1 ]
机构
[1] UNIV CAMBRIDGE,DEPT EARTH SCI,CAMBRIDGE CB2 3EQ,ENGLAND
关键词
D O I
10.1088/0953-8984/3/27/009
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Biquadratic coupling between two order parameters Q1 and Q2 can lead to transitions between a phase with only one of the two order parameters active (phase I or II) and a mixed phase III in which both order parameters are symmetry breaking. Domain walls for positive coupling energies are chiral under thermodynamic conditions close to the transition points I-III and II-III. Annihilation of chirality in the wall leads to wall widening and wall bifurcations. The widths of the walls are different for the two order parameters leading to greater lattice distortions on either side of the wall than in the centre of the wall.
引用
收藏
页码:5163 / 5169
页数:7
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