Orbital mismatch boosting nematic instability in iron-based superconductors

被引：28

作者：

Fanfarillo, Laura ^{[1
,2
]}

Benfatto, Lara ^{[3
,4
]}

Valenzuela, Belen ^{[5
]}

机构：

[1] CNR, IOM, Via Bonomea 265, I-34136 Trieste, Italy

[2] Int Sch Adv Studies SISSA, Via Bonomea 265, I-34136 Trieste, Italy

[3] Sapienza Univ Rome, ISC CNR, Ple A Moro 5, I-00185 Rome, Italy

[4] Sapienza Univ Rome, Dept Phys, Ple A Moro 5, I-00185 Rome, Italy

[5] CSIC, ICMM, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 12期

关键词：

MAGNETIC ORDER; FESE;

D O I：

10.1103/PhysRevB.97.121109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We derive the effective action for the collective spin modes in iron-based superconductors. We show that, due to the orbital-selective nature of spin fluctuations, the magnetic and nematic instabilities are controlled by the degrees of orbital nesting between electron and hole pockets. Within a prototypical three-pocket model the hole-electron orbital mismatch is found to boost spin-nematic order. This explains the enhancement of nematic order in FeSe as compared to 122 compounds, and its suppression under pressure, where the emergence of the second hole pocket compensates the orbital mismatch of the three-pocket configuration.

引用

页数：5

共 42 条

[1] Electronic structure and ultrafast dynamics of FeAs-based superconductors by angle- and time-resolved photoemission spectroscopy [J].

Avigo, I. ;

Thirupathaiah, S. ;

Rienks, E. D. L. ;

Rettig, L. ;

Charnukha, A. ;

Ligges, M. ;

Cortes, R. ;

Nayak, J. ;

Jeevan, H. S. ;

Wolf, T. ;

Huang, Y. ;

Wurmehl, S. ;

Sturza, M. I. ;

Gegenwart, P. ;

Golden, M. S. ;

Yang, L. X. ;

Rossnagel, K. ;

Bauer, M. ;

Buechner, B. ;

Vojta, M. ;

Wolf, M. ;

Felser, C. ;

Fink, J. ;

Bovensiepen, U. .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2017, 254 (01)

[2]

Baek SH, 2015, NAT MATER, V14, P210, DOI [10.1038/nmat4138, 10.1038/NMAT4138]

[3] Magnetic interactions in iron superconductors: A review [J].

Bascones, Elena ;

Valenzuela, Belen ;

Jose Calderon, Maria .

COMPTES RENDUS PHYSIQUE, 2016, 17 (1-2) :36-59

[4] Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe [J].

Boehmer, A. E. ;

Hardy, F. ;

Eilers, F. ;

Ernst, D. ;

Adelmann, P. ;

Schweiss, P. ;

Wolf, T. ;

Meingast, C. .

PHYSICAL REVIEW B, 2013, 87 (18)

[5] Spin-driven nematic instability of the multiorbital Hubbard model: Application to iron-based superconductors [J].

Christensen, Morten H. ;

Kang, Jian ;

Andersen, Brian M. ;

Fernandes, Rafael M. .

PHYSICAL REVIEW B, 2016, 93 (08)

[6] Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides [J].

Christensen, Morten H. ;

Kang, Jian ;

Andersen, Brian M. ;

Eremin, Ilya ;

Fernandes, Rafael M. .

PHYSICAL REVIEW B, 2015, 92 (21)

[7] Magnetism, Superconductivity, and Spontaneous Orbital Order in Iron-Based Superconductors: Which Comes First and Why? [J].

Chubukov, Andrey V. ;

Khodas, M. ;

Fernandes, Rafael M. .

PHYSICAL REVIEW X, 2016, 6 (04)

[8] Interplay between Magnetism, Superconductivity, and Orbital Order in 5-Pocket Model for Iron-Based Superconductors: Parquet Renormalization Group Study [J].

Classen, Laura ;

Xing, Rui-Qi ;

Khodas, Maxim ;

Chubukov, Andrey V. .

PHYSICAL REVIEW LETTERS, 2017, 118 (03)

[9] The Key Ingredients of the Electronic Structure of FeSe [J].

Coldea, Amalia I. ;

Watson, Matthew D. .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 9, 2018, 9 :125-146

[10] Space group symmetry, spin-orbit coupling, and the low-energy effective Hamiltonian for iron-based superconductors [J].

Cvetkovic, Vladimir ;

Vafek, Oskar .

PHYSICAL REVIEW B, 2013, 88 (13)

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