Collapse of the spin gap with pressure in spin-ladder compounds

被引：2

作者：

Schmeltzer, D ^{[1
]}

Bishop, AR

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA

[3] CUNY City Coll, Dept Phys, New York, NY 10031 USA

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.58.R5905

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We introduce a model of weakly coupled spin ladders using a decomposition into triplet and singlet Majorana fermions. We show that a weak coupling between the ladders causes the triplet gap to vanish. Assuming that pressure enhances the interladder coupling, we find that the triplet gap vanishes with increased pressure. We suggest that this is the explanation of recent nuclear magnetic resonance experimental data in superconducting spin-ladder compounds such as Sr2Ca12Cu24O41.

引用

页码：R5905 / R5907

页数：3

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