Interplay between magnetism and superconductivity in the iron pnictides

被引：121
作者：
Vorontsov, A. B. [1 ]
Vavilov, M. G. [1 ]
Chubukov, A. V. [1 ]
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 06期
关键词：
band model of magnetism; barium compounds; commensurate-incommensurate transformations; iron compounds; lanthanum compounds; magnetic transitions; phase diagrams; spin density waves; superconducting transitions; SPIN-DENSITY-WAVE; FREE-ENERGY;
D O I：
10.1103/PhysRevB.79.060508
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We consider phase transitions and potential coexistence of spin-density-wave (SDW) magnetic order and extended s-wave (s(+)) superconducting order within a two-band itinerant model of iron pnictides in which SDW magnetism and s(+) superconductivity are competing orders. We show that depending on parameters, the transition between these two states is either first order or involves an intermediate phase in which the two orders coexist. We demonstrate that such coexistence is possible when SDW order is incommensurate.
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页数：4
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