Superconducting properties of the s ± -wave state: Fe-based superconductors

Bang, Yunkyu; Stewart, G. R.

doi:10.1088/1361-648X/aa564b

Title: Superconducting properties of the s ^± -wave state: Fe-based superconductors

Abstract

Although the pairing mechanism of Fe-based superconductors (FeSCs) has not yet been settled with consensus with regard to the pairing symmetry and the superconducting (SC) gap function, the vast majority of experiments support the existence of spin-singlet signchanging s-wave SC gaps on multi-bands (s±-wave state). This multi-band s±-wave state is a very unique gap state per se and displays numerous unexpected novel SC properties, such as a strong reduction of the coherence peak, non-trivial impurity effects, nodal-gap-like nuclear magnetic resonance signals, various Volovik effects in the specific heat (SH) and thermal conductivity, and anomalous scaling behaviors with a SH jump and condensation energy versus Tc, etc. In particular, many of these non-trivial SC properties can easily be mistaken as evidence for a nodal-gap state such as a d-wave gap. In this review, we provide detailed explanations of the theoretical principles for the various non-trivial SC properties of the s±-wave pairing state, and then critically compare the theoretical predictions with experiments on FeSCs. This will provide a pedagogical overview of to what extent we can coherently understand the wide range of different experiments on FeSCs within the s±-wave gap model.

Authors:: Bang, Yunkyu; Stewart, G. R.

Publication Date:: Mon Feb 13 00:00:00 EST 2017

Research Org.:: Univ. of Florida, Gainesville, FL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1343462

Alternate Identifier(s):: OSTI ID: 1424735

Grant/Contract Number:: FG02-86ER45268

Resource Type:: Published Article

Journal Name:: Journal of Physics. Condensed Matter

Additional Journal Information:: Journal Name: Journal of Physics. Condensed Matter Journal Volume: 29 Journal Issue: 12; Journal ID: ISSN 0953-8984

Publisher:: IOP Publishing

Country of Publication:: United Kingdom

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; iron-based superconductors, s±-wave pairing state, superconducting properties

Citation Formats


                    Bang, Yunkyu, and Stewart, G. R. Superconducting properties of the s ± -wave state: Fe-based superconductors.  United Kingdom: N. p., 2017. 
Web.  doi:10.1088/1361-648X/aa564b.

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                    Bang, Yunkyu, & Stewart, G. R. Superconducting properties of the s ± -wave state: Fe-based superconductors.  United Kingdom.  https://doi.org/10.1088/1361-648X/aa564b

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                    Bang, Yunkyu, and Stewart, G. R. Mon .  
"Superconducting properties of the s ± -wave state: Fe-based superconductors".  United Kingdom.  https://doi.org/10.1088/1361-648X/aa564b.

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@article{osti_1343462,

  title        = {Superconducting properties of the s ± -wave state: Fe-based superconductors},

  author       = {Bang, Yunkyu and Stewart, G. R.},

  abstractNote = {Although the pairing mechanism of Fe-based superconductors (FeSCs) has not yet been settled with consensus with regard to the pairing symmetry and the superconducting (SC) gap function, the vast majority of experiments support the existence of spin-singlet signchanging s-wave SC gaps on multi-bands (s±-wave state). This multi-band s±-wave state is a very unique gap state per se and displays numerous unexpected novel SC properties, such as a strong reduction of the coherence peak, non-trivial impurity effects, nodal-gap-like nuclear magnetic resonance signals, various Volovik effects in the specific heat (SH) and thermal conductivity, and anomalous scaling behaviors with a SH jump and condensation energy versus Tc, etc. In particular, many of these non-trivial SC properties can easily be mistaken as evidence for a nodal-gap state such as a d-wave gap. In this review, we provide detailed explanations of the theoretical principles for the various non-trivial SC properties of the s±-wave pairing state, and then critically compare the theoretical predictions with experiments on FeSCs. This will provide a pedagogical overview of to what extent we can coherently understand the wide range of different experiments on FeSCs within the s±-wave gap model.},

  doi          = {10.1088/1361-648X/aa564b},

  journal      = {Journal of Physics. Condensed Matter},

  number       = 12,

  volume       = 29,

  place        = {United Kingdom},

  year         = {Mon Feb 13 00:00:00 EST 2017},

  month        = {Mon Feb 13 00:00:00 EST 2017}

}

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Strong Correlations and Magnetic Frustration in the High $T_{c}$ Iron Pnictides
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Ding, H.; Richard, P.; Nakayama, K.
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DOI: 10.1209/0295-5075/83/47001

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Pinpointing gap minima in $Ba {({Fe}_{0.94} {Co}_{0.06})}_{2} {As}_{2}$ via band-structure calculations and electronic Raman scattering
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Mazin, I. I.; Devereaux, T. P.; Analytis, J. G.
Physical Review B, Vol. 82, Issue 18
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Model for the Magnetic Order and Pairing Channels in Fe Pnictide Superconductors
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Daghofer, M.; Moreo, A.; Riera, J. A.
Physical Review Letters, Vol. 101, Issue 23
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Strong coupling between local moments and superconducting ‘heavy’ electrons in UPd2Al3
journal, March 2001

Sato, N. K.; Aso, N.; Miyake, K.
Nature, Vol. 410, Issue 6826
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Low temperature specific heat of the hole-doped ${Ba}_{0.6} K_{0.4} {Fe}_{2} {As}_{2}$ single crystals
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Mu, Gang; Luo, Huiqian; Wang, Zhaosheng
Physical Review B, Vol. 79, Issue 17
DOI: 10.1103/PhysRevB.79.174501

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Fletcher, J. D.; Serafin, A.; Malone, L.
Physical Review Letters, Vol. 102, Issue 14
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Phase-sensitive tests of the symmetry of the pairing state in the high-temperature superconductors—Evidence for $d_{x^{2} - y^{2}}$ symmetry
journal, April 1995

Van Harlingen, D. J.
Reviews of Modern Physics, Vol. 67, Issue 2
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A Relation between the Resonance Neutron Peak and ARPES Data in Cuprates
journal, August 1999

Abanov, Ar.; Chubukov, Andrey V.
Physical Review Letters, Vol. 83, Issue 8
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Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
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Seo, Kangjun; Bernevig, B. Andrei; Hu, Jiangping
Physical Review Letters, Vol. 101, Issue 20
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Neutron scattering resonance and the iron-pnictide superconducting gap
journal, April 2009

Maier, T. A.; Graser, S.; Scalapino, D. J.
Physical Review B, Vol. 79, Issue 13
DOI: 10.1103/PhysRevB.79.134520

Raman-Scattering Detection of Nearly Degenerate $s$ -Wave and $d$ -Wave Pairing Channels in Iron-Based ${Ba}_{0.6} K_{0.4} {Fe}_{2} {As}_{2}$ and ${Rb}_{0.8} {Fe}_{1.6} {Se}_{2}$ Superconductors
journal, May 2013

Kretzschmar, F.; Muschler, B.; Böhm, T.
Physical Review Letters, Vol. 110, Issue 18
DOI: 10.1103/PhysRevLett.110.187002

Doping dependence of the specific heat of single-crystal BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$
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Chaparro, C.; Fang, L.; Claus, H.
Physical Review B, Vol. 85, Issue 18
DOI: 10.1103/PhysRevB.85.184525

The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
journal, October 2010

Johnston, David C.
Advances in Physics, Vol. 59, Issue 6
DOI: 10.1080/00018732.2010.513480

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Title: Superconducting properties of the s ± -wave state: Fe-based superconductors

Abstract

Citation Formats

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Collective d -wave exciton modes in the calculated Raman spectrum of Fe-based superconductors journal, October 2009

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Title: Superconducting properties of the s ^± -wave state: Fe-based superconductors

Doping-dependent specific heat study of the superconducting gap in $Ba {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$
journal, May 2010

Nodes in the gap function of LaFePO, the gap function of the Fe(Se,Te) systems, and the STM signature of the $s_{\pm}$ pairing
journal, May 2010

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journal, March 2009

Pair breaking in iron pnictides
journal, December 2009

Anisotropic London penetration depth and superfluid density in single crystals of iron-based pnictide superconductors
journal, May 2009

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journal, October 2012

Jump in specific heat at the superconducting transition temperature in $Ba {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$ and $Ba {({Fe}_{1 - x} {Ni}_{x})}_{2} {As}_{2}$ single crystals
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journal, December 2002

Superconductivity-induced phonon renormalization on ${NaFe}_{1 - x}$ ${Co}_{x}$ As
journal, May 2014

Effect of Fermi Surface Nesting on Resonant Spin Excitations in ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$
journal, October 2011

Violation of Anderson’s Theorem for the Sign-Reversing $s$ -Wave State of Iron-Pnictide Superconductors
journal, October 2009

Antiferromagnetic correlation and the pairing mechanism of the cuprates and iron pnictides: A view from the functional renormalization group studies
journal, February 2009

Self-consistent Vertex Correction Analysis for Iron-based Superconductors: Mechanism of Coulomb Interaction-Driven Orbital Fluctuations
journal, September 2012

Spin-singlet superconductivity with multiple gaps in PrFeAsO _0.89 F _0.11
journal, July 2008

Universal scaling law for the condensation energy across a broad range of superconductor classes
journal, December 2015

Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films
journal, May 2013

Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO ₃ substrates
journal, February 2016

Quasiparticle Thermal Conductivity in the Vortex State of High- $T_{c}$ Cuprates
journal, November 1999

Self-consistent $d_{x}^{2}$ - $y^{2}$ pairing in a two-dimensional Hubbard model
journal, March 1994

Impurity effects on the $\pm s$ -wave state of the iron-based superconductors
journal, February 2009

The origin of the condensation energy scaling of iron-based superconductors
journal, July 2016

Normal-state spin dynamics and temperature-dependent spin-resonance energy in optimally doped BaFe1.85Co0.15As2
journal, December 2009

Iron-based superconductors, seven years later
journal, June 2015

Functional Renormalization-Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs-Based High-Temperature Superconductor
journal, January 2009

Neutron scattering from a collective spin fluctuation mode in a ${CuO}_{2}$ bilayer
journal, March 1996

Direct Observation of Nodes and Twofold Symmetry in FeSe Superconductor
journal, June 2011

Fermi Surface of ${SrFe}_{2} P_{2}$ Determined by the de Haas–van Alphen Effect
journal, August 2009

Superfluid density of the ±s-wave state for the iron-based superconductors
journal, May 2009

Collective $d$ -wave exciton modes in the calculated Raman spectrum of Fe-based superconductors
journal, October 2009

Momentum dependence and nodes of the superconducting gap in the iron pnictides
journal, October 2009

Unconventional Anisotropic $s$ -Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor
journal, January 2012

Specific heat of Ca0.33Na0.67Fe2As2
journal, September 2014

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journal, July 2008

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journal, April 1999

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journal, January 2016

Isotropic quantum scattering and unconventional superconductivity
journal, November 2008

Quasiparticle Mass Enhancement Close to the Quantum Critical Point in ${BaFe}_{2} ({As}_{1 - x} P_{x})_{2}$
journal, June 2013

Spin Fluctuations and Unconventional Superconductivity in the Fe-Based Oxypnictide Superconductor LaFeAsO _0.7 Probed by ⁵⁷ Fe-NMR
journal, January 2009

Superconductivity of LaFe _{1- y} Co _y AsO _{1- x} F _x
journal, October 2008

Specific heat to $H_{c 2}$ : Evidence for nodes or deep minima in the superconducting gap of underdoped and overdoped Ba(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
journal, July 2012

Using controlled disorder to distinguish $s_{\pm}$ and $s_{+}_{+}$ gap structure in Fe-based superconductors
journal, March 2013

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journal, December 2010

Sensitivity of the superconducting state and magnetic susceptibility to key aspects of electronic structure in ferropnictides
journal, July 2010

Evidence for superconducting gap nodes in the zone-centered hole bands of ${KFe}_{2} {As}_{2}$ from magnetic penetration-depth measurements
journal, July 2010

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journal, March 2009

Possible nodal superconducting gap and Lifshitz transition in heavily hole-doped Ba $_{0.1}$ K $_{0.9}$ Fe $_{2}$ As $_{2}$
journal, December 2013

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Effect of strong scattering on the low-temperature penetration depth of a d -wave superconductor
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journal, April 2014

Effect of Electron Irradiation on Superconductivity in Single Crystals of $Ba ({Fe}_{1 - x} {Ru}_{x})_{2} {As}_{2}$ ( $x = 0.24$ )
journal, November 2014

Pnictogen height as a possible switch between high- $T_{c}$ nodeless and low- $T_{c}$ nodal pairings in the iron-based superconductors
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Effect of 3d transition metal doping on the superconductivity in quaternary fluoroarsenide CaFeAsF
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Unconventional Pairing Originating from the Disconnected Fermi Surfaces of Superconducting ${LaFeAsO}_{1 - x} F_{x}$
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Static and Dynamic Magnetism in Underdoped Superconductor ${BaFe}_{1.92} {Co}_{0.08} {As}_{2}$
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Suppression of the Critical Temperature of Superconducting NdFeAs(OF) Single Crystals by Kondo-Like Defect Sites Induced by $α$ -Particle Irradiation
journal, February 2010

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Theory of thermal conductivity in extended- $s$ state superconductors: Application to ferropnictides
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Unconventional London Penetration Depth in Single-Crystal $Ba ({Fe}_{0.93} {Co}_{0.07})_{2} {As}_{2}$ Superconductors
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