Multiple gaps and superfluid density from interband pairing in a four-band model of the iron oxypnictides

被引：39
作者：
Benfatto, L. [1 ,2 ,3 ]
Capone, M. [2 ,3 ,4 ]
Caprara, S. [2 ,3 ]
Castellani, C. [2 ,3 ]
Di Castro, C. [2 ,3 ]
机构：
[1] Ctr Studi & Ric Enrico Fermi, I-00184 Rome, Italy
[2] Univ Roma La Sapienza, CNR, INFM, CRS SMC, I-00185 Rome, Italy
[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[4] CNR, ISC, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW B | 2008年 / 78卷 / 14期
关键词：
D O I：
10.1103/PhysRevB.78.140502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study a four-band model for the iron oxypnictides, in which the superconducting properties are assumed to be determined by the interband coupling between holelike and electronlike Fermi sheets. We show that reasonable parameters can account for the angle-resolved photoemission spectra, showing multiple gaps in Ba1-xKxFe2As2, and for the temperature dependence of the superfluid density. At the same time, the zero-temperature value of the superfluid density shows a conventional scaling with the number of carriers.
引用
收藏
页数：4
相关论文
共 28 条
  • [1] ACZEL AA, ARXIV08071044, P83703
  • [2] Low-energy phase-only action in a superconductor:: A comparison with the XY model -: art. no. 184510
    Benfatto, L
    Toschi, A
    Caprara, S
    [J]. PHYSICAL REVIEW B, 2004, 69 (18) : 184510 - 1
  • [3] Is LaFeAsO1-xFx an electron-phonon superconductor?
    Boeri, L.
    Dolgov, O. V.
    Golubov, A. A.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 101 (02)
  • [4] Strongly correlated superconductivity and pseudogap phase near a multiband Mott insulator
    Capone, M
    Fabrizio, M
    Castellani, C
    Tosatti, E
    [J]. PHYSICAL REVIEW LETTERS, 2004, 93 (04) : 047001 - 1
  • [5] CHUBUKOV AV, ARXIV08073735, P83703
  • [6] Optical conductivity and the correlation strength of high-temperature copper-oxide superconductors
    Comanac, Armin
    De' Medici, Luca
    Capone, Massimo
    Millis, A. J.
    [J]. NATURE PHYSICS, 2008, 4 (04) : 287 - 290
  • [7] Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
    Ding, H.
    Richard, P.
    Nakayama, K.
    Sugawara, K.
    Arakane, T.
    Sekiba, Y.
    Takayama, A.
    Souma, S.
    Sato, T.
    Takahashi, T.
    Wang, Z.
    Dai, X.
    Fang, Z.
    Chen, G. F.
    Luo, J. L.
    Wang, N. L.
    [J]. EPL, 2008, 83 (04)
  • [8] GONNELLI RS, ARXIV08073149, P83703
  • [9] Correlated electronic structure of LaO1-xFxFeAs
    Haule, K.
    Shim, J. H.
    Kotliar, G.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 100 (22)
  • [10] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K
    Kamihara, Yoichi
    Watanabe, Takumi
    Hirano, Masahiro
    Hosono, Hideo
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) : 3296 - +
123