Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55

Sarkar, Saheli; Van Dyke, John; Sprau, Peter O.; Massee, Freek; Welp, Ulrich; Kwok, Wai-Kwong; Davis, J. C.  Seamus; Morr, Dirk K.

doi:10.1103/PhysRevB.96.060504

Title: Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide ${FeSe}_{0.45} {Te}_{0.55}$

Abstract

We demonstrate that the differential conductance, dI/dV , measured via spectroscopic imaging scanning tunneling microscopy in the doped iron chalcogenide FeSe0.45Te0.55, possesses a series of characteristic features that allow one to extract the orbital structure of the superconducting gaps. This yields nearly isotropic superconducting gaps on the two hole-like Fermi surfaces, and a strongly anisotropic gap on the electron-like Fermi surface. Moreover, we show that the pinning of nematic fluctuations by defects can give rise to a dumbbell-like spatial structure of the induced impurity bound states, and explains the related C₂-symmetry in the Fourier transformed differential conductance.

Authors:

Sarkar, Saheli ^[1]; Van Dyke, John ^[2]; Sprau, Peter O. ^[3]; Massee, Freek ^[4]; Welp, Ulrich ^[5]; Kwok, Wai-Kwong ^[5]; Davis, J. C. Seamus ^[6]; Morr, Dirk K. ^[1]

Univ. of Illinois, Chicago, IL (United States)
Univ. of Illinois, Chicago, IL (United States); Iowa State Univ., Ames, IA (United States)
Cornell Univ., Ithaca, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Cornell Univ., Ithaca, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. Paris-Saclay, Gif-sur-Yvette (France)
Argonne National Lab. (ANL), Argonne, IL (United States)
Cornell Univ., Ithaca, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of St. Andrews, Scotland (United Kingdom); Univ. College Cork (Ireland)

Publication Date:: Wed Aug 09 00:00:00 EDT 2017

Research Org.:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Lab. (BNL), Upton, NY (United States)

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

OSTI Identifier:: 1412748

Alternate Identifier(s):: OSTI ID: 1374652

Report Number(s):: BNL-114711-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: PM015; KC0207010; TRN: US1800341

Grant/Contract Number:: SC0012704; 2009-BNL-PM015; FG02-05ER46225

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Sarkar, Saheli, Van Dyke, John, Sprau, Peter O., Massee, Freek, Welp, Ulrich, Kwok, Wai-Kwong, Davis, J. C.  Seamus, and Morr, Dirk K. Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevB.96.060504.

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                    Sarkar, Saheli, Van Dyke, John, Sprau, Peter O., Massee, Freek, Welp, Ulrich, Kwok, Wai-Kwong, Davis, J. C.  Seamus, & Morr, Dirk K. Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55.  United States.  https://doi.org/10.1103/PhysRevB.96.060504

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                    Sarkar, Saheli, Van Dyke, John, Sprau, Peter O., Massee, Freek, Welp, Ulrich, Kwok, Wai-Kwong, Davis, J. C.  Seamus, and Morr, Dirk K. Wed .  
"Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55".  United States.  https://doi.org/10.1103/PhysRevB.96.060504.  https://www.osti.gov/servlets/purl/1412748.

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@article{osti_1412748,

  title        = {Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55},

  author       = {Sarkar, Saheli and Van Dyke, John and Sprau, Peter O. and Massee, Freek and Welp, Ulrich and Kwok, Wai-Kwong and Davis, J. C.  Seamus and Morr, Dirk K.},

  abstractNote = {We demonstrate that the differential conductance, dI/dV , measured via spectroscopic imaging scanning tunneling microscopy in the doped iron chalcogenide FeSe0.45Te0.55, possesses a series of characteristic features that allow one to extract the orbital structure of the superconducting gaps. This yields nearly isotropic superconducting gaps on the two hole-like Fermi surfaces, and a strongly anisotropic gap on the electron-like Fermi surface. Moreover, we show that the pinning of nematic fluctuations by defects can give rise to a dumbbell-like spatial structure of the induced impurity bound states, and explains the related C2-symmetry in the Fourier transformed differential conductance.},

  doi          = {10.1103/PhysRevB.96.060504},

  journal      = {Physical Review B},

  number       = 6,

  volume       = 96,

  place        = {United States},

  year         = {Wed Aug 09 00:00:00 EDT 2017},

  month        = {Wed Aug 09 00:00:00 EDT 2017}

}

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Works referencing / citing this record:

Signatures of nodeless multiband superconductivity and particle-hole crossover in the vortex cores of ${FeTe}_{0.55} {Se}_{0.45}$
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Berthod, Christophe
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Evidence for dispersing 1D Majorana channels in an iron-based superconductor
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Some Properties of Fe1 +ySexTe1 –x Single Crystals in the Superconducting and Normal States
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Vedeneev, S. I.; Golubkov, M. V.; Gorina, Yu. I.
Journal of Experimental and Theoretical Physics, Vol. 127, Issue 4
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Title: Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe 0.45 Te 0.55

Abstract

Citation Formats

Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+δ journal, June 2001

Strong Electron Correlations in the Normal State of the Iron-Based FeSe 0.42 Te 0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy journal, March 2010

Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides journal, July 2012

Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1 − x F x journal, July 2008

Anisotropic structure of the order parameter in FeSe0.45Te0.55 revealed by angle-resolved specific heat journal, November 2010

Evidence for orbital order and its relation to superconductivity in FeSe 0.4 Te 0.6 journal, October 2015

Evidence for a cos ﻿ ( 4 φ ) Modulation of the Superconducting Energy Gap of Optimally Doped FeTe 0.6 Se 0.4 Single Crystals Using Laser Angle-Resolved Photoemission Spectroscopy journal, December 2012

Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides journal, August 2015

Magnetism, superconductivity, and pairing symmetry in iron-based superconductors journal, October 2008

Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides journal, September 2011

Near-degeneracy of several pairing channels in multiorbital models for the Fe pnictides journal, February 2009

Surface electronic structure and isotropic superconducting gap in ( Li 0.8 Fe 0.2 ) OH Fe Se journal, August 2015

Differential conductance and defect states in the heavy-fermion superconductor CeCoIn 5 journal, January 2016

Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe 0.55 Se 0.45 journal, March 2012

Absence of a Holelike Fermi Surface for the Iron-Based K 0.8 Fe 1.7 Se 2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy journal, May 2011

Discovery of orbital-selective Cooper pairing in FeSe journal, July 2017

Fluctuating charge order in the cuprates: Spatial anisotropy and feedback from superconductivity journal, October 2015

Superconductivity in iron compounds journal, December 2011

High-temperature superconductivity in iron pnictides and chalcogenides journal, March 2016

What drives nematic order in iron-based superconductors? journal, January 2014

Identifying collective modes through impurity pinning in cuprate superconductors journal, August 2008

Impurity states and cooperative magnetic order in Fe-based superconductors journal, December 2013

Common electronic origin of superconductivity in (Li,Fe)OHFeSe bulk superconductor and single-layer FeSe/SrTiO3 films journal, February 2016

Preemptive nematic order, pseudogap, and orbital order in the iron pnictides journal, January 2012

Gap symmetry and structure of Fe-based superconductors journal, October 2011

Visualizing nodal heavy fermion superconductivity in CeCoIn5 journal, July 2013

Angle-Resolved Photoemission Spectroscopy of the Iron-Chalcogenide Superconductor Fe 1.03 Te 0.7 Se 0.3 : Strong Coupling Behavior and the Universality of Interband Scattering journal, November 2010

Signatures of nodeless multiband superconductivity and particle-hole crossover in the vortex cores of FeTe 0.55 Se 0.45 journal, October 2018

Evidence for dispersing 1D Majorana channels in an iron-based superconductor journal, January 2020

Some Properties of Fe1 +ySexTe1 –x Single Crystals in the Superconducting and Normal States journal, October 2018

Title: Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide ${FeSe}_{0.45} {Te}_{0.55}$

Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+δ
journal, June 2001

Strong Electron Correlations in the Normal State of the Iron-Based ${FeSe}_{0.42} {Te}_{0.58}$ Superconductor Observed by Angle-Resolved Photoemission Spectroscopy
journal, March 2010

Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
journal, July 2012

Unconventional Superconductivity with a Sign Reversal in the Order Parameter of ${LaFeAsO}_{1 - x} F_{x}$
journal, July 2008

Anisotropic structure of the order parameter in FeSe0.45Te0.55 revealed by angle-resolved specific heat
journal, November 2010

Evidence for orbital order and its relation to superconductivity in FeSe _0.4 Te _0.6
journal, October 2015

Evidence for a $\cos (4 φ)$ Modulation of the Superconducting Energy Gap of Optimally Doped ${FeTe}_{0.6} {Se}_{0.4}$ Single Crystals Using Laser Angle-Resolved Photoemission Spectroscopy
journal, December 2012

Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides
journal, August 2015

Magnetism, superconductivity, and pairing symmetry in iron-based superconductors
journal, October 2008

Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
journal, September 2011

Near-degeneracy of several pairing channels in multiorbital models for the Fe pnictides
journal, February 2009

Surface electronic structure and isotropic superconducting gap in $({Li}_{0.8} {Fe}_{0.2}) OH Fe Se$
journal, August 2015

Differential conductance and defect states in the heavy-fermion superconductor ${CeCoIn}_{5}$
journal, January 2016

Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe $_{0.55}$ Se $_{0.45}$
journal, March 2012

Absence of a Holelike Fermi Surface for the Iron-Based $K_{0.8} {Fe}_{1.7} {Se}_{2}$ Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy
journal, May 2011

Discovery of orbital-selective Cooper pairing in FeSe
journal, July 2017

Fluctuating charge order in the cuprates: Spatial anisotropy and feedback from superconductivity
journal, October 2015

Superconductivity in iron compounds
journal, December 2011

High-temperature superconductivity in iron pnictides and chalcogenides
journal, March 2016

What drives nematic order in iron-based superconductors?
journal, January 2014

Identifying collective modes through impurity pinning in cuprate superconductors
journal, August 2008

Impurity states and cooperative magnetic order in Fe-based superconductors
journal, December 2013

Common electronic origin of superconductivity in (Li,Fe)OHFeSe bulk superconductor and single-layer FeSe/SrTiO3 films
journal, February 2016

Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
journal, January 2012

Gap symmetry and structure of Fe-based superconductors
journal, October 2011

Visualizing nodal heavy fermion superconductivity in CeCoIn5
journal, July 2013

Angle-Resolved Photoemission Spectroscopy of the Iron-Chalcogenide Superconductor ${Fe}_{1.03} {Te}_{0.7} {Se}_{0.3}$ : Strong Coupling Behavior and the Universality of Interband Scattering
journal, November 2010

Signatures of nodeless multiband superconductivity and particle-hole crossover in the vortex cores of ${FeTe}_{0.55} {Se}_{0.45}$
journal, October 2018

Evidence for dispersing 1D Majorana channels in an iron-based superconductor
journal, January 2020

Some Properties of Fe1 +ySexTe1 –x Single Crystals in the Superconducting and Normal States
journal, October 2018