Low-energy bound states at interfaces between superconducting and block antiferromagnetic regions in KxFe2-ySe2

被引：3

作者：

Mukherjee, S. ^{[1
,2
]}

Gastiasoro, M. N. ^{[1
]}

Hirschfeld, P. J. ^{[3
]}

Andersen, B. M. ^{[1
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

[2] Univ Copenhagen, Niels Bohr Inst, Niels Bohr Int Acad, DK-2100 Copenhagen O, Denmark

[3] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 01期

基金：

美国国家科学基金会;

关键词：

PHASE-SEPARATION; MAGNETIC ORDER;

D O I：

10.1103/PhysRevB.88.014519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The high-T-c alkali doped iron selenide superconductors KxFe2-ySe2 have been recently shown to be intrinsically phase separated into Fe vacancy ordered block antiferromagnetic regions and superconducting regions at low temperatures. In this work, we use a microscopic five orbital Hubbard model to obtain the electronic low-energy states near the interfaces between block antiferromagnets and superconductors. It is found that abundant low-energy in-gap bound states exist near such interfaces irrespective of whether the superconductor has d- or s-wave pairing symmetry. By contrast, it is shown how scattering from (110) boundaries can provide a natural means to distinguish between these two leading pairing instabilities of the KxFe2-ySe2 materials.

引用

页数：7

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