Spin-fluctuation-induced superconductivity controlled by orbital fluctuation

被引：55

作者：

Takimoto, T ^{[1
]}

Hotta, T

Maehira, T

Ueda, K

机构：

[1] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 21期

关键词：

D O I：

10.1088/0953-8984/14/21/101

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A microscopic Hamiltonian reflecting the correct symmetry of f orbitals is proposed for discussing superconductivity in heavy-fermion systems. In the orbitally degenerate region in which not only spin fluctuations (SF) but also orbital fluctuations (OF) show considerable development, cancellation between SF and OF destabilizes the d(x2-y2)-wave superconductivity. On entering the non-degenerate region by increasing the crystalline electric field, d(x2-y2)-wave superconductivity mediated by antiferromagnetic SF emerges from the suppression of OF. We argue that the present scenario can be applied to the recently discovered superconductors CeTIn5 (T = Ir, Rh, and Co).

引用

页码：L369 / L375

页数：7

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