Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe4As4

Cho, Kyuil; Fente, A.; Teknowijoyo, S.; Tanatar, M. A.; Joshi, K. R.; Nusran, N. M.; Kong, T.; Meier, W. R.; Kaluarachchi, U.; Guillamón, I.; Suderow, H.; Bud'ko, S. L.; Canfield, P. C.; Prozorov, R.

doi:10.1103/PhysRevB.95.100502

Title: Nodeless multiband superconductivity in stoichiometric single-crystalline ${CaKFe}_{4} {As}_{4}$

Abstract

Measurements of the London penetration depth Δλ(T) and tunneling conductance in single crystals of the recently discovered stoichiometric iron-based superconductor CaKFe₄As₄ (CaK1144) show nodeless, two-effective-gap superconductivity with a larger gap of about 6–10 meV and a smaller gap of about 1–4 meV. Having a critical temperature T_c,onset ≈ 35.8 K, this material behaves similar to slightly overdoped (Ba_1–xK_x)Fe₂As₂ (e.g., x = 0.54,T_c ≈ 34 K), a known multigap s_± superconductor. Here, we conclude that the superconducting behavior of stoichiometric CaK1144 demonstrates that two-gap s± superconductivity is an essential property of high-temperature superconductivity in iron-based superconductors, independent of the degree of substitutional disorder.

Authors:

Cho, Kyuil ^[1]; Fente, A. ^[2]; Teknowijoyo, S. ^[1]; Tanatar, M. A. ^[1]; Joshi, K. R. ^[1]; Nusran, N. M. ^[1]; Kong, T. ^[1]; Meier, W. R. ^[1]; Kaluarachchi, U. ^[1]; Guillamón, I. ^[2]; Suderow, H. ^[2]; Bud'ko, S. L. ^[1]; Canfield, P. C. ^[1]; Prozorov, R. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Univ. Autonoma de Madrid, Madrid (Spain)

Publication Date:: Wed Mar 08 00:00:00 EST 2017

Research Org.:: Ames Lab., Ames, IA (United States)

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

OSTI Identifier:: 1350068

Alternate Identifier(s):: OSTI ID: 1346271

Report Number(s):: IS-J-9232
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1700632

Grant/Contract Number:: AC02-07CH11358; 679080; GBMF4411

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 95; Journal Issue: 10; 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


                    Cho, Kyuil, Fente, A., Teknowijoyo, S., Tanatar, M. A., Joshi, K. R., Nusran, N. M., Kong, T., Meier, W. R., Kaluarachchi, U., Guillamón, I., Suderow, H., Bud'ko, S. L., Canfield, P. C., and Prozorov, R. Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe4As4.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevB.95.100502.

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                    Cho, Kyuil, Fente, A., Teknowijoyo, S., Tanatar, M. A., Joshi, K. R., Nusran, N. M., Kong, T., Meier, W. R., Kaluarachchi, U., Guillamón, I., Suderow, H., Bud'ko, S. L., Canfield, P. C., & Prozorov, R. Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe4As4.  United States.  https://doi.org/10.1103/PhysRevB.95.100502

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                    Cho, Kyuil, Fente, A., Teknowijoyo, S., Tanatar, M. A., Joshi, K. R., Nusran, N. M., Kong, T., Meier, W. R., Kaluarachchi, U., Guillamón, I., Suderow, H., Bud'ko, S. L., Canfield, P. C., and Prozorov, R. Wed .  
"Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe4As4".  United States.  https://doi.org/10.1103/PhysRevB.95.100502.  https://www.osti.gov/servlets/purl/1350068.

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@article{osti_1350068,

  title        = {Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe4As4},

  author       = {Cho, Kyuil and Fente, A. and Teknowijoyo, S. and Tanatar, M. A. and Joshi, K. R. and Nusran, N. M. and Kong, T. and Meier, W. R. and Kaluarachchi, U. and Guillamón, I. and Suderow, H. and Bud'ko, S. L. and Canfield, P. C. and Prozorov, R.},

  abstractNote = {Measurements of the London penetration depth Δλ(T) and tunneling conductance in single crystals of the recently discovered stoichiometric iron-based superconductor CaKFe4As4 (CaK1144) show nodeless, two-effective-gap superconductivity with a larger gap of about 6–10 meV and a smaller gap of about 1–4 meV. Having a critical temperature Tc,onset ≈ 35.8 K, this material behaves similar to slightly overdoped (Ba1–xKx)Fe2As2 (e.g., x = 0.54,Tc ≈ 34 K), a known multigap s± superconductor. Here, we conclude that the superconducting behavior of stoichiometric CaK1144 demonstrates that two-gap s± superconductivity is an essential property of high-temperature superconductivity in iron-based superconductors, independent of the degree of substitutional disorder.},

  doi          = {10.1103/PhysRevB.95.100502},

  journal      = {Physical Review B},

  number       = 10,

  volume       = 95,

  place        = {United States},

  year         = {Wed Mar 08 00:00:00 EST 2017},

  month        = {Wed Mar 08 00:00:00 EST 2017}

}

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Title: Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe 4 As 4

Abstract

Citation Formats

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London penetration depth in iron-based superconductors journal, September 2011

Magnetic Penetration Depth in Unconventional Superconductors journal, January 2007

Superfluid density and specific heat within self-consistent scheme for two-band superconductor text, January 2009

FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2 text, January 2010

High-temperature superconductivity in iron-based materials text, January 2010

Disorder induced transition between s_+- and s_++ states in two-band superconductors text, January 2011

Superconductivity in Iron Compounds text, January 2011

Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors text, January 2012

Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors text, January 2015

Energy Gap Evolution Across the Superconductivity Dome in Single Crystals of (Ba$_{1-x}$K$_x$)Fe$_2$As$_2$ text, January 2016

Magnetic Penetration Depth in Unconventional Superconductors text, January 2006

Electronic Properties and Fermi Surface for New Layered High-Temperature Superconductors CaAFe4As4 (A = K, Rb, and Cs): FLAPW-GGA Calculations journal, November 2017

A brief review on μSR studies of unconventional Fe- and Cr-based superconductors journal, October 2018

Effect of pressure on the self-hole-doped superconductor RbGd 2 Fe 4 As 4 O 2 journal, December 2018

Chemical stability and superconductivity in Ag-sheathed CaKFe 4 As 4 superconducting tapes journal, November 2018

Evaluation of a practical level of critical current densities in pnictides and recently discovered superconductors journal, July 2019

Optimization of superconducting properties of the stoichiometric CaKFe 4 As 4 journal, December 2019

Odd and Even Modes of Neutron Spin Resonance in the Bilayer Iron-Based Superconductor CaKFe 4 As 4 journal, June 2018

Diamagnetic Response of Potassium-Adsorbed Multilayer FeSe Film journal, December 2019

75As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe0.967Ni0.033)4As4 journal, April 2019

A brief review on muSR studies of unconventional Fe and Cr-based superconductors text, January 2018

Title: Nodeless multiband superconductivity in stoichiometric single-crystalline ${CaKFe}_{4} {As}_{4}$

Anisotropic thermodynamic and transport properties of single-crystalline ${CaKFe}_{4} {As}_{4}$
journal, August 2016

A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2
journal, June 2012

Disorder-induced transition between $s_{\pm}$ and $s_{+ +}$ states in two-band superconductors
journal, November 2011

Superconductivity gets an iron boost
journal, March 2010

Effect of strong scattering on the low-temperature penetration depth of a d -wave superconductor
journal, August 1993

Rutgers relation for the analysis of superfluid density in superconductors
journal, June 2013

Pairing Mechanism in Fe-Based Superconductors
journal, March 2012

Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2
journal, February 2011

Pair breaking in iron pnictides
journal, December 2009

Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors
journal, November 2011

Interband coupling and nonmagnetic interband scattering in $\pm s$ superconductors
journal, June 2016

Nanoscale superconducting-gap variations and lack of phase separation in optimally doped ${BaFe}_{1.86} {Co}_{0.14} {As}_{2}$
journal, June 2009

New-Structure-Type Fe-Based Superconductors: Ca A Fe ₄ As ₄ ( A = K, Rb, Cs) and Sr A Fe ₄ As ₄ ( A = Rb, Cs)
journal, March 2016

Using gap symmetry and structure to reveal the pairing mechanism in Fe-based superconductors
journal, January 2016

Scanning tunneling spectroscopy in MgB2
journal, March 2003

Energy gap evolution across the superconductivity dome in single crystals of (Ba _{1− x} K _x )Fe ₂ As ₂
journal, September 2016

FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe ₂ As ₂
journal, August 2010

Compact very low temperature scanning tunneling microscope with mechanically driven horizontal linear positioning stage
journal, March 2011

Scanning tunneling spectroscopy with superconducting tips of Al
journal, April 2008

Observation of unreconstructed square atomic square lattice in Ca(Fe _0.965 Co _0.035 ) ₂ As ₂ cleaved at very low temperatures
journal, December 2014

Measurements of the absolute value of the penetration depth in high-Tc superconductors using a low-Tc superconductive coating
journal, December 2000

Tunneling Spectroscopy in Small Grains of Superconducting ${MgB}_{2}$
journal, June 2001

High-temperature superconductivity in iron-based materials
journal, August 2010

Superfluid density and specific heat within a self-consistent scheme for a two-band superconductor
journal, July 2009

Superconductivity in iron compounds
journal, December 2011

Competition between superconductivity and magnetic/nematic order as a source of anisotropic superconducting gap in underdoped ${Ba}_{1 - x}$ $K_{x}$ ${Fe}_{2}$ ${As}_{2}$
journal, July 2014

London penetration depth and pair breaking
journal, December 2013

STM study of multiband superconductivity in NbSe2 using a superconducting tip
journal, May 2004

Meissner-London state in superconductors of rectangular cross section in a perpendicular magnetic field
journal, July 2000

Superconducting Density of States and Vortex Cores of 2H- ${NbS}_{2}$
journal, October 2008

Imaging superconducting vortex cores and lattices with a scanning tunneling microscope
journal, May 2014

Scanning tunneling spectroscopy of high-temperature superconductors
journal, March 2007

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

Comprehensive scenario for single-crystal growth and doping dependence of resistivity and anisotropic upper critical fields in (Ba $_{1 - x}$ K $_{x}$ )Fe $_{2}$ As $_{2}$ ( $0.22 \leq x \leq 1$ )
journal, April 2014

London penetration depth in iron-based superconductors
journal, September 2011

Magnetic Penetration Depth in Unconventional Superconductors
journal, January 2007

Superfluid density and specific heat within self-consistent scheme for two-band superconductor
text, January 2009

FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
text, January 2010

High-temperature superconductivity in iron-based materials
text, January 2010

Disorder induced transition between s_+- and s_++ states in two-band superconductors
text, January 2011

Superconductivity in Iron Compounds
text, January 2011

Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors
text, January 2012

Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
text, January 2015

Energy Gap Evolution Across the Superconductivity Dome in Single Crystals of (Ba$_{1-x}$K$_x$)Fe$_2$As$_2$
text, January 2016

Magnetic Penetration Depth in Unconventional Superconductors
text, January 2006

Electronic Properties and Fermi Surface for New Layered High-Temperature Superconductors CaAFe4As4 (A = K, Rb, and Cs): FLAPW-GGA Calculations
journal, November 2017

A brief review on μSR studies of unconventional Fe- and Cr-based superconductors
journal, October 2018

Effect of pressure on the self-hole-doped superconductor RbGd ₂ Fe ₄ As ₄ O ₂
journal, December 2018

Chemical stability and superconductivity in Ag-sheathed CaKFe ₄ As ₄ superconducting tapes
journal, November 2018

Evaluation of a practical level of critical current densities in pnictides and recently discovered superconductors
journal, July 2019

Optimization of superconducting properties of the stoichiometric CaKFe ₄ As ₄
journal, December 2019

Odd and Even Modes of Neutron Spin Resonance in the Bilayer Iron-Based Superconductor ${CaKFe}_{4} {As}_{4}$
journal, June 2018

Diamagnetic Response of Potassium-Adsorbed Multilayer FeSe Film
journal, December 2019

⁷⁵As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe_0.967Ni_0.033)₄As₄
journal, April 2019

A brief review on muSR studies of unconventional Fe and Cr-based superconductors
text, January 2018