Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1–xCox)2As2

Zhang, Rui N.; Wang, Weiyi; Maier, Thomas A.; Wang, Meng; Stone, Matthew B.; Chi, Songxue; Winn, Barry L.; Dai, Pengcheng

doi:10.1103/PhysRevB.98.060502

Title: Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in ${Ba}_{0.67} K_{0.33} {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$

Abstract

Here, we use inelastic neutron scattering to study the energy and wave-vector dependence of the superconductivity-induced resonance in hole-doped Ba_0.67K_0.33(Fe_1–xCo_x)₂As₂ (x=0 and 0.08 with T_c ≈ 37 and 28 K, respectively). In previous work on electron-doped Ba(Fe_0.963Ni_0.037)₂As₂ (T_N = 26 K and T_c = 17 K), the resonance is found to peak sharply at the antiferromagnetic (AF) ordering wave vector Q_AF along the longitudinal direction, but disperses upwards away from Q_AF along the transverse direction. For hole-doped x = 0 and 0.08 without AF order, we find that the resonance displays a ringlike upward dispersion away from Q_AF along both the longitudinal and transverse directions. By comparing these results with calculations using the random phase approximation, we conclude that the dispersive resonance is a direct signature of isotropic superconducting gaps arising from nested hole-electron Fermi surfaces.

Authors:

Zhang, Rui N. ^[1]; Wang, Weiyi ^[1];

^[2]; Wang, Meng ^[3];

^[2];

^[2]; Dai, Pengcheng ^[1]

Rice Univ., Houston, TX (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sun Yat-Sen Univ., Guangzhou (China)

Publication Date:: 2018-08-30

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1468036

Alternate Identifier(s):: OSTI ID: 1467958

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 98; Journal Issue: 6; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats


                    Zhang, Rui N., Wang, Weiyi, Maier, Thomas A., Wang, Meng, Stone, Matthew B., Chi, Songxue, Winn, Barry L., and Dai, Pengcheng. Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1–xCox)2As2.  United States: N. p., 2018. 
Web.  doi:10.1103/PhysRevB.98.060502.

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                    Zhang, Rui N., Wang, Weiyi, Maier, Thomas A., Wang, Meng, Stone, Matthew B., Chi, Songxue, Winn, Barry L., & Dai, Pengcheng. Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1–xCox)2As2.  United States.  https://doi.org/10.1103/PhysRevB.98.060502

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                    Zhang, Rui N., Wang, Weiyi, Maier, Thomas A., Wang, Meng, Stone, Matthew B., Chi, Songxue, Winn, Barry L., and Dai, Pengcheng. Thu .  
"Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1–xCox)2As2".  United States.  https://doi.org/10.1103/PhysRevB.98.060502.  https://www.osti.gov/servlets/purl/1468036.

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@article{osti_1468036,

  title        = {Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1–xCox)2As2},

  author       = {Zhang, Rui N. and Wang, Weiyi and Maier, Thomas A. and Wang, Meng and Stone, Matthew B. and Chi, Songxue and Winn, Barry L. and Dai, Pengcheng},

  abstractNote = {Here, we use inelastic neutron scattering to study the energy and wave-vector dependence of the superconductivity-induced resonance in hole-doped Ba0.67K0.33(Fe1–xCox)2As2 (x=0 and 0.08 with Tc ≈ 37 and 28 K, respectively). In previous work on electron-doped Ba(Fe0.963Ni0.037)2As2 (TN = 26 K and Tc = 17 K), the resonance is found to peak sharply at the antiferromagnetic (AF) ordering wave vector QAF along the longitudinal direction, but disperses upwards away from QAF along the transverse direction. For hole-doped x = 0 and 0.08 without AF order, we find that the resonance displays a ringlike upward dispersion away from QAF along both the longitudinal and transverse directions. By comparing these results with calculations using the random phase approximation, we conclude that the dispersive resonance is a direct signature of isotropic superconducting gaps arising from nested hole-electron Fermi surfaces.},

  doi          = {10.1103/PhysRevB.98.060502},

  journal      = {Physical Review B},

  number       = 6,

  volume       = 98,

  place        = {United States},

  year         = {2018},

  month        = {8}

}

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Title: Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba 0.67 K 0.33 ( Fe 1 – x Co x ) 2 As 2

Abstract

Citation Formats

Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering journal, December 2008

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Ising Incommensurate Spin Resonance of CeCoIn 5 : A Dynamical Precursor of the Q Phase journal, July 2015

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Microscopic coexistence of magnetism and superconductivity in charge-compensated Ba 1 − x K x ( Fe 1 − y Co y ) 2 As 2 journal, April 2014

Two-dimensional resonant magnetic excitation in BaFe 1.84 Co 0.16 As 2 journal, March 2009

Transition from Sign-Reversed to Sign-Preserved Cooper-Pairing Symmetry in Sulfur-Doped Iron Selenide Superconductors journal, May 2016

Theory of neutron scattering as a probe of the superconducting gap in the iron pnictides journal, July 2008

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials journal, January 2012

Spin fluctuations and superconductivity in a three-dimensional tight-binding model for BaFe 2 As 2 journal, June 2010

Crossover from weak to strong pairing in unconventional superconductors journal, June 2011

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A Relation between the Resonance Neutron Peak and ARPES Data in Cuprates journal, August 1999

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Magnitude of the Magnetic Exchange Interaction in the Heavy-Fermion Antiferromagnet CeRhIn 5 journal, December 2014

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Title: Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in ${Ba}_{0.67} K_{0.33} {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$

Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering
journal, December 2008

Magnonlike Dispersion of Spin Resonance in Ni-doped $Ba {Fe}_{2} {As}_{2}$
journal, April 2013

Antiferromagnetic order and spin dynamics in iron-based superconductors
journal, August 2015

The structure of the high-energy spin excitations in a high-transition-temperature superconductor
journal, June 2004

Avoided Quantum Criticality and Magnetoelastic Coupling in ${BaFe}_{2 - x} {Ni}_{x} {As}_{2}$
journal, June 2013

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journal, October 2011

Ising Incommensurate Spin Resonance of ${CeCoIn}_{5}$ : A Dynamical Precursor of the $Q$ Phase
journal, July 2015

Resonance in the electron-doped high-transition-temperature superconductor Pr0.88LaCe0.12CuO4-δ
journal, July 2006

Measurement of a Double Neutron-Spin Resonance and an Anisotropic Energy Gap for Underdoped Superconducting ${NaFe}_{0.985} {Co}_{0.015} As$ Using Inelastic Neutron Scattering
journal, November 2013

Single to Multiquasiparticle Excitations in the Itinerant Helical Magnet ${CeRhIn}_{5}$
journal, June 2015

Neutron scattering study of the YBa2Cu3O6+x system
journal, December 1991

From quantum matter to high-temperature superconductivity in copper oxides
journal, February 2015

Dispersion of Magnetic Excitations in Optimally Doped Superconducting ${Y B a}_{2} {C u}_{3} O_{6.95}$
journal, November 2004

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journal, September 2016

Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides
journal, December 2013

Magnetic excitations in underdoped Ba(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$ with $x = 0.047$
journal, July 2012

Spin Resonance in the $d$ -Wave Superconductor ${CeCoIn}_{5}$
journal, February 2008

The effect of collective spin-1 excitations on electronic spectra in high- T _c superconductors
journal, January 2006

Electron doping evolution of the anisotropic spin excitations in BaFe $_{2 - x}$ Ni $_{x}$ As $_{2}$
journal, July 2012

Spectral analysis for the iron-based superconductors: Anisotropic spin fluctuations and fully gapped $s^{\pm}$ -wave superconductivity
journal, October 2010

Superconductivity suppression of Ba $_{0.5}$ K $_{0.5}$ Fe $_{2 - 2 x} M_{2 x}$ As $_{2}$ single crystals by substitution of transition metal ( $M$ = Mn, Ru, Co, Ni, Cu, and Zn)
journal, June 2012

Inelastic Neutron-Scattering Measurements of a Three-Dimensional Spin Resonance in the FeAs-Based ${BaFe}_{1.9} {Ni}_{0.1} {As}_{2}$ Superconductor
journal, March 2009

Evolution of the resonance and incommensurate spin fluctuations in superconducting ${YBa}_{2} {Cu}_{3} O_{6 + x}$
journal, January 2001

Microscopic coexistence of magnetism and superconductivity in charge-compensated ${Ba}_{1 - x}$ $K_{x}$ ( ${Fe}_{1 - y}$ ${Co}_{y}$ ) $_{2}$ ${As}_{2}$
journal, April 2014

Two-dimensional resonant magnetic excitation in ${BaFe}_{1.84} {Co}_{0.16} {As}_{2}$
journal, March 2009

Transition from Sign-Reversed to Sign-Preserved Cooper-Pairing Symmetry in Sulfur-Doped Iron Selenide Superconductors
journal, May 2016

Theory of neutron scattering as a probe of the superconducting gap in the iron pnictides
journal, July 2008

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials
journal, January 2012

Spin fluctuations and superconductivity in a three-dimensional tight-binding model for ${BaFe}_{2} {As}_{2}$
journal, June 2010

Crossover from weak to strong pairing in unconventional superconductors
journal, June 2011

Electron doping evolution of the magnetic excitations in BaFe $_{2 - x}$ Ni $_{x}$ As $_{2}$
journal, October 2013

A Relation between the Resonance Neutron Peak and ARPES Data in Cuprates
journal, August 1999

A universal relationship between magnetic resonance and superconducting gap in unconventional superconductors
journal, October 2009

Magnitude of the Magnetic Exchange Interaction in the Heavy-Fermion Antiferromagnet ${CeRhIn}_{5}$
journal, December 2014

The Spin Excitation Spectrum in Superconducting YBa2Cu3O6.85
journal, May 2000

Spin Resonance in Three-Dimensional Superconductors: The Case of ${CeCoIn}_{5}$
journal, October 2008

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

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

A common thread: The pairing interaction for unconventional superconductors
journal, October 2012

Dispersion of the neutron resonance in cuprate superconductors
journal, April 2001

Anisotropic spin fluctuations in detwinned FeSe
journal, May 2019

Spin fluctuation anisotropy as a probe of orbital-selective hole-electron quasiparticle excitations in detwinned $Ba {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$
journal, October 2019

Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in ${SrCo}_{2} {As}_{2}$
journal, March 2019

Anisotropic spin fluctuations in detwinned FeSe
text, January 2019