Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO 3 substrates

doi:https://doi.org/10.1088/1367-2630/18/2/022001

Title: Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO ₃ substrates

Abstract

In this paper, we study the consequences of an electron–phonon (e–ph) interaction that is strongly peaked in the forward scattering ($${\bf{q}}=0$$) direction in a two-dimensional superconductor using Migdal–Eliashberg theory. We find that strong forward scattering results in an enhanced T _c that is linearly proportional to the strength of the dimensionless e–ph coupling constant $${\lambda }_{m}$$ in the weak coupling limit. This interaction also produces distinct replica bands in the single-particle spectral function, similar to those observed in recent angle-resolved photoemission experiments on FeSe monolayers on SrTiO ₃ and BaTiO ₃ substrates. Finally, by comparing our model to photoemission experiments, we infer an e–ph coupling strength that can provide a significant portion of the observed high T _c in these systems.

Authors:: Rademaker, Louk; Wang, Yan; Berlijn, Tom; Johnston, Steve

Publication Date:: 2016-02-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Netherlands Organization for Scientific Research (NWO)

OSTI Identifier:: 1237517

Alternate Identifier(s):: OSTI ID: 1237518; OSTI ID: 1261270

Grant/Contract Number:: Wigner Fellowship; Rubicon Fellowship; AC05-00OR22725

Resource Type:: Journal Article: Published Article

Journal Name:: New Journal of Physics

Additional Journal Information:: Journal Name: New Journal of Physics Journal Volume: 18 Journal Issue: 2; Journal ID: ISSN 1367-2630

Publisher:: IOP Publishing

Country of Publication:: United Kingdom

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconductivity; electron-phonon interactions; Eliashberg theory; FeSe thin films

Citation Formats


                    Rademaker, Louk, Wang, Yan, Berlijn, Tom, and Johnston, Steve. Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO 3 substrates.  United Kingdom: N. p., 2016. 
        Web.  doi:10.1088/1367-2630/18/2/022001.

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                    Rademaker, Louk, Wang, Yan, Berlijn, Tom, & Johnston, Steve. Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO 3 substrates.  United Kingdom.  https://doi.org/10.1088/1367-2630/18/2/022001

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                    Rademaker, Louk, Wang, Yan, Berlijn, Tom, and Johnston, Steve. Mon .  
        "Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO 3 substrates".  United Kingdom.  https://doi.org/10.1088/1367-2630/18/2/022001.

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@article{osti_1237517,

  title        = {Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO 3 substrates},

  author       = {Rademaker, Louk and Wang, Yan and Berlijn, Tom and Johnston, Steve},

  abstractNote = {In this paper, we study the consequences of an electron–phonon (e–ph) interaction that is strongly peaked in the forward scattering (${\bf{q}}=0$) direction in a two-dimensional superconductor using Migdal–Eliashberg theory. We find that strong forward scattering results in an enhanced T c that is linearly proportional to the strength of the dimensionless e–ph coupling constant ${\lambda }_{m}$ in the weak coupling limit. This interaction also produces distinct replica bands in the single-particle spectral function, similar to those observed in recent angle-resolved photoemission experiments on FeSe monolayers on SrTiO3 and BaTiO3 substrates. Finally, by comparing our model to photoemission experiments, we infer an e–ph coupling strength that can provide a significant portion of the observed high T c in these systems.},

  doi          = {10.1088/1367-2630/18/2/022001},

  url          = {https://www.osti.gov/biblio/1237517},
  journal      = {New Journal of Physics},

  issn         = {1367-2630},

  number       = 2,

  volume       = 18,

  place        = {United Kingdom},

  year         = {2016},

  month        = {2}

}

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Title: Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO 3 substrates

Abstract

Citation Formats

Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor journal, January 2012

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

Interface charge doping effects on superconductivity of single-unit-cell FeSe films on SrTiO 3 substrates journal, February 2014

Interface-induced superconductivity and strain-dependent spin density waves in FeSe/SrTiO3 thin films journal, May 2013

Antiferromagnetic FeSe monolayer on SrTiO3: The charge doping and electric field effects journal, July 2013

Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3 journal, November 2014

Tuning the band structure and superconductivity in single-layer FeSe by interface engineering journal, September 2014

Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3 journal, November 2014

Measurement of an Enhanced Superconducting Phase and a Pronounced Anisotropy of the Energy Gap of a Strained FeSe Single Layer in FeSe / Nb : SrTiO 3 / KTaO 3 Heterostructures Using Photoemission Spectroscopy journal, March 2014

Atomic and electronic structures of FeSe monolayer and bilayer thin films on SrTiO 3 (001): First-principles study journal, June 2012

High-temperature superconductivity at the FeSe/SrTiO 3 interface journal, October 2012

Electron-phonon coupling enhanced by the FeSe/SrTiO 3 interface journal, May 2014

Dichotomy of the electronic structure and superconductivity between single-layer and double-layer FeSe/SrTiO3 films journal, September 2014

Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe / SrTiO 3 journal, July 2015

Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunnelling microscopy journal, August 2015

What makes the T c of FeSe/SrTiO 3 so high? journal, November 2015

High-temperature superconductivity in potassium-coated multilayer FeSe thin films journal, June 2015

Superconductivity in the PbO-type structure -FeSe journal, September 2008

Interface-enhanced high-temperature superconductivity in single-unit-cell FeT e 1 − x S e x films on SrTi O 3 journal, June 2015

Normal and superconducting state in the presence of forward electron-phonon and impurity scattering journal, May 1999

Density-of-states-driven anisotropies induced by momentum decoupling in Bi 2 Sr 2 Ca Cu 2 O 8 journal, September 1996

Evidence for the Importance of Extended Coulomb Interactions and Forward Scattering in Cuprate Superconductors journal, April 2012

Electron-phonon vertex in the two-dimensional one-band Hubbard model journal, December 2003

Influence of strong electron correlations on the electron-phonon coupling in high- T c oxides journal, February 1994

d x 2 − y 2 symmetry and the pairing mechanism journal, December 1996

s- and d-wave symmetries of the solutions of the Eliashberg equations journal, March 1996

Forward scattering peak in the electron-phonon interaction and impurity scattering of cuprate superconductors journal, January 2005

Small- q phonon-mediated unconventional superconductivity in the iron pnictides journal, March 2011

Nonadiabatic superconductivity. I. Vertex corrections for the electron-phonon interactions journal, October 1995

Nonadiabatic superconductivity. II. Generalized Eliashberg equations beyond Migdal’s theorem journal, October 1995

Large phonon band gap in Sr Ti O 3 and the vibrational signatures of ferroelectricity in A Ti O 3 perovskites: First-principles lattice dynamics and inelastic neutron scattering journal, April 2008

Properties of boson-exchange superconductors journal, October 1990

Effects of phonon interaction on pairing in high- T c superconductors journal, August 2008

Isotope effect and the role of phonons in the iron-based superconductors journal, March 2009

Systematic study of electron-phonon coupling to oxygen modes across the cuprates journal, August 2010

Iterative analytic continuation of the electron self-energy to the real axis journal, April 1988

Phononic self-energy effects and superconductivity in CaC 6 journal, May 2012

Two-gap superconductivity in heavily n -doped graphene: Ab initio Migdal-Eliashberg theory journal, July 2014

Enhancement of Superconductivity near a Nematic Quantum Critical Point journal, March 2015

Pairing interaction near a nematic quantum critical point of a three-band CuO 2 model journal, November 2014

Ab initio study of cross-interface electron-phonon couplings in FeSe thin films on SrTiO 3 and BaTiO 3 journal, April 2016

Type-II Dirac semimetal stabilized by electron-phonon coupling journal, December 2017

Evidence of cooperative effect on the enhanced superconducting transition temperature at the FeSe/SrTiO3 interface journal, February 2019

Superconducting properties of the s ± -wave state: Fe-based superconductors journal, February 2017

High-temperature superconductivity in one-unit-cell FeSe films journal, March 2017

The electron–phonon interaction with forward scattering peak is dominant in high T c superconductors of FeSe films on ${{\rm{SrTiO}}}_{3}$ (TiO 2 ) journal, January 2017

Band structure and charge doping effects of the potassium-adsorbed FeSe / SrTiO 3 system journal, February 2016

Bounds on nanoscale nematicity in single-layer FeSe / SrTiO 3 journal, March 2016

Charge transfer and electron-phonon coupling in monolayer FeSe on Nb-doped SrTiO 3 journal, June 2016

Phonon linewidth due to electron-phonon interactions with strong forward scattering in FeSe thin films on oxide substrates journal, August 2017

Dipolar phonons and electronic screening in monolayer FeSe on SrTiO 3 journal, August 2017

Multiband full-bandwidth anisotropic Eliashberg theory of interfacial electron-phonon coupling and high − T c superconductivity in FeSe / SrTiO 3 journal, February 2018

Self-consistent temperature dependence of quasiparticle bands in monolayer FeSe on SrTiO 3 journal, September 2018

Phonon-mediated superconductivity in low carrier-density systems journal, March 2019

High-Temperature Superconductivity in Single-Unit-Cell FeSe Films on Anatase TiO 2 ( 001 ) journal, August 2016

Electron Phonon Coupling versus Photoelectron Energy Loss at the Origin of Replica Bands in Photoemission of FeSe on SrTiO 3 journal, June 2018

Hund-Enhanced Electronic Compressibility in FeSe and its Correlation with T c journal, November 2018

Direct imaging of electron transfer and its influence on superconducting pairing at FeSe/SrTiO 3 interface journal, March 2018

Cavity quantum-electrodynamical polaritonically enhanced electron-phonon coupling and its influence on superconductivity journal, November 2018

On the origin of the shallow and “replica” bands in FeSe monolayer superconductors journal, March 2017

Title: Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO ₃ substrates

Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor
journal, January 2012

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

Interface charge doping effects on superconductivity of single-unit-cell FeSe films on ${SrTiO}_{3}$ substrates
journal, February 2014

Interface-induced superconductivity and strain-dependent spin density waves in FeSe/SrTiO3 thin films
journal, May 2013

Antiferromagnetic FeSe monolayer on SrTiO3: The charge doping and electric field effects
journal, July 2013

Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3
journal, November 2014

Tuning the band structure and superconductivity in single-layer FeSe by interface engineering
journal, September 2014

Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3
journal, November 2014

Measurement of an Enhanced Superconducting Phase and a Pronounced Anisotropy of the Energy Gap of a Strained FeSe Single Layer in $FeSe / Nb : {SrTiO}_{3} / {KTaO}_{3}$ Heterostructures Using Photoemission Spectroscopy
journal, March 2014

Atomic and electronic structures of FeSe monolayer and bilayer thin films on SrTiO $_{3}$ (001): First-principles study
journal, June 2012

High-temperature superconductivity at the FeSe/SrTiO $_{3}$ interface
journal, October 2012

Electron-phonon coupling enhanced by the FeSe/SrTiO ₃ interface
journal, May 2014

Dichotomy of the electronic structure and superconductivity between single-layer and double-layer FeSe/SrTiO3 films
journal, September 2014

Revealing the Empty-State Electronic Structure of Single-Unit-Cell $FeSe / {SrTiO}_{3}$
journal, July 2015

Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunnelling microscopy
journal, August 2015

What makes the T _c of FeSe/SrTiO ₃ so high?
journal, November 2015

High-temperature superconductivity in potassium-coated multilayer FeSe thin films
journal, June 2015

Superconductivity in the PbO-type structure -FeSe
journal, September 2008

Interface-enhanced high-temperature superconductivity in single-unit-cell $FeT e_{1 - x} S e_{x}$ films on $SrTi O_{3}$
journal, June 2015

Normal and superconducting state in the presence of forward electron-phonon and impurity scattering
journal, May 1999

Density-of-states-driven anisotropies induced by momentum decoupling in ${Bi}_{2}$ ${Sr}_{2}$ Ca ${Cu}_{2}$ $O_{8}$
journal, September 1996

Evidence for the Importance of Extended Coulomb Interactions and Forward Scattering in Cuprate Superconductors
journal, April 2012

Electron-phonon vertex in the two-dimensional one-band Hubbard model
journal, December 2003

Influence of strong electron correlations on the electron-phonon coupling in high- $T_{c}$ oxides
journal, February 1994

$d_{x^{2} - y^{2}}$ symmetry and the pairing mechanism
journal, December 1996

s- and d-wave symmetries of the solutions of the Eliashberg equations
journal, March 1996

Forward scattering peak in the electron-phonon interaction and impurity scattering of cuprate superconductors
journal, January 2005

Small- $q$ phonon-mediated unconventional superconductivity in the iron pnictides
journal, March 2011

Nonadiabatic superconductivity. I. Vertex corrections for the electron-phonon interactions
journal, October 1995

Nonadiabatic superconductivity. II. Generalized Eliashberg equations beyond Migdal’s theorem
journal, October 1995

Large phonon band gap in $Sr Ti O_{3}$ and the vibrational signatures of ferroelectricity in $A Ti O_{3}$ perovskites: First-principles lattice dynamics and inelastic neutron scattering
journal, April 2008

Properties of boson-exchange superconductors
journal, October 1990

Effects of phonon interaction on pairing in high- $T_{c}$ superconductors
journal, August 2008

Isotope effect and the role of phonons in the iron-based superconductors
journal, March 2009

Systematic study of electron-phonon coupling to oxygen modes across the cuprates
journal, August 2010

Iterative analytic continuation of the electron self-energy to the real axis
journal, April 1988

Phononic self-energy effects and superconductivity in CaC $_{6}$
journal, May 2012

Two-gap superconductivity in heavily $n$ -doped graphene: Ab initio Migdal-Eliashberg theory
journal, July 2014

Enhancement of Superconductivity near a Nematic Quantum Critical Point
journal, March 2015

Pairing interaction near a nematic quantum critical point of a three-band ${CuO}_{2}$ model
journal, November 2014

Ab initio study of cross-interface electron-phonon couplings in FeSe thin films on ${SrTiO}_{3}$ and ${BaTiO}_{3}$
journal, April 2016

Type-II Dirac semimetal stabilized by electron-phonon coupling
journal, December 2017

Evidence of cooperative effect on the enhanced superconducting transition temperature at the FeSe/SrTiO3 interface
journal, February 2019

Superconducting properties of the s ^± -wave state: Fe-based superconductors
journal, February 2017

High-temperature superconductivity in one-unit-cell FeSe films
journal, March 2017

The electron–phonon interaction with forward scattering peak is dominant in high T _c superconductors of FeSe films on ${{\rm{SrTiO}}}_{3}$ (TiO ₂ )
journal, January 2017

Band structure and charge doping effects of the potassium-adsorbed $FeSe / {SrTiO}_{3}$ system
journal, February 2016

Bounds on nanoscale nematicity in single-layer $FeSe / {SrTiO}_{3}$
journal, March 2016

Charge transfer and electron-phonon coupling in monolayer FeSe on Nb-doped ${SrTiO}_{3}$
journal, June 2016

Phonon linewidth due to electron-phonon interactions with strong forward scattering in FeSe thin films on oxide substrates
journal, August 2017

Dipolar phonons and electronic screening in monolayer FeSe on ${SrTiO}_{3}$
journal, August 2017

Multiband full-bandwidth anisotropic Eliashberg theory of interfacial electron-phonon coupling and $high − T_{c}$ superconductivity in $FeSe / {SrTiO}_{3}$
journal, February 2018

Self-consistent temperature dependence of quasiparticle bands in monolayer FeSe on ${SrTiO}_{3}$
journal, September 2018

Phonon-mediated superconductivity in low carrier-density systems
journal, March 2019

High-Temperature Superconductivity in Single-Unit-Cell FeSe Films on Anatase ${TiO}_{2} (001)$
journal, August 2016

Electron Phonon Coupling versus Photoelectron Energy Loss at the Origin of Replica Bands in Photoemission of FeSe on SrTiO 3
journal, June 2018

Hund-Enhanced Electronic Compressibility in FeSe and its Correlation with $T_{c}$
journal, November 2018

Direct imaging of electron transfer and its influence on superconducting pairing at FeSe/SrTiO ₃ interface
journal, March 2018

Cavity quantum-electrodynamical polaritonically enhanced electron-phonon coupling and its influence on superconductivity
journal, November 2018

On the origin of the shallow and “replica” bands in FeSe monolayer superconductors
journal, March 2017