Electronic structure of new iron-based superconductors: From pnictides to chalcogenides and other similar systems

被引：19

作者：

Nekrasov, I. A. ^{[1
]}

Sadovskii, M. V. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Inst Electrophys, Ural Branch, Ekaterinburg 620016, Russia

[2] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

来源：

JETP LETTERS | 2014年 / 99卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; TRANSITION-TEMPERATURE; PHASE-TRANSITIONS; T-C; PROTOTYPE;

D O I：

10.1134/S0021364014100075

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic spectra of new iron-based high-temperature superconductors and a number of other chemically similar compounds have been discussed and compared with the focus on iron chalcogenide K1 - x Fe2 - y Se-2 and isostructural pnictide BaFe2As2 (122). It has been shown that the Fermi surfaces in K1 - x Fe2 - y Se-2 are significantly different from those in pnictides. The LDA + DMFT and LDA' + DMFT calculations have demonstrated that the effect of electron correlations in K1 - x Fe2 - y Se-2 on the electronic structure is much stronger than that in the most studied 122 system. The electronic structure of several multiband superconductors similar in chemical composition to iron-based high-temperature superconductors, but having a relatively low T (c) value (such as SrPt2As2, APt(3)P (A = Sr, Ca, La), and (Sr, Ca)Pd2As2), and the non-superconducting compound BaFe2Se3 has also been discussed. It has been shown that the electronic structure of these systems is significantly different from previously studied iron pnictides and chalcogenides. The T (c) value in these systems can be understood within the simple Bardeen-Cooper-Schrieffer model.

引用

页码：598 / 612

页数：15

共 61 条

[51] Electronic band structure of new "122" pnictogen-free superconductor SrPd2Ge2 as compared with SrNi2Ge2 and SrNi2As2 from first principles calculations
Shein, I. R.
Ivanovskii, A. L.
[J]. PHYSICA B-CONDENSED MATTER, 2010, 405 (16) : 3213 - 3216
[52] Coulomb correlation effects in LaFeAsO: An LDA plus DMFT(QMC) study
Shorikov, A. O.
Korotin, M. A.
Streltsov, S. V.
Skornyakov, S. L.
Korotin, Dm. M.
Anisimov, V. I.
[J]. JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 2009, 108 (01) : 121 - 125
[53] PHENOMENOLOGICAL THEORY OF UNCONVENTIONAL SUPERCONDUCTIVITY
SIGRIST, M
UEDA, K
[J]. REVIEWS OF MODERN PHYSICS, 1991, 63 (02) : 239 - 311
[54] Classification of the electronic correlation strength in the iron pnictides: The case of the parent compound BaFe2As2
Skornyakov, S. L.
Efremov, A. V.
Skorikov, N. A.
Korotin, M. A.
Izyumov, Yu. A.
Anisimov, V. I.
Kozhevnikov, A. V.
Vollhardt, D.
[J]. PHYSICAL REVIEW B, 2009, 80 (09):
[55] Density functional study of BaNi2As2: Electronic structure, phonons, and electron-phonon superconductivity
Subedi, Alaska
Singh, David J.
[J]. PHYSICAL REVIEW B, 2008, 78 (13):
[56] Strong Coupling Superconductivity at 8.4 K in an Antiperovskite Phosphide SrPt3P
Takayama, T.
Kuwano, K.
Hirai, D.
Katsura, Y.
Yamamoto, A.
Takagi, H.
[J]. PHYSICAL REVIEW LETTERS, 2012, 108 (23)
[57] Volovik G. E., 1985, Soviet Physics - JETP, V61, P843
[58] Volovik G. E., 2010, PHYSICA C, V470, pS418
[59] Overview on the physics and materials of the new superconductor KxFe2-ySe2
Wen, Hai-Hu
[J]. REPORTS ON PROGRESS IN PHYSICS, 2012, 75 (11)
[60] Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in AxFe2-ySe2 (A = K, Rb) Superconductors
Yi, M.
Lu, D. H.
Yu, R.
Riggs, S. C.
Chu, J. -H.
Lv, B.
Liu, Z. K.
Lu, M.
Cui, Y. -T.
Hashimoto, M.
Mo, S. -K.
Hussain, Z.
Chu, C. W.
Fisher, I. R.
Si, Q.
Shen, Z. -X.
[J]. PHYSICAL REVIEW LETTERS, 2013, 110 (06)

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