Superconducting pairing mechanism in CeCoIn5 revisited

T. J. Reber; J. D. Rameau; C. Petrovic; Hasnain Hafiz; M. Lindroos; A. Bansil; P. D. Johnson

doi:10.1103/PhysRevB.102.205112

Superconducting pairing mechanism in CeCoIn5 revisited

T. J. Reber
, J. D. Rameau
, C. Petrovic
, Hasnain Hafiz
, M. Lindroos
, A. Bansil
, P. D. Johnson

Physics

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

18 Downloads (Pure)

Abstract

Spectroscopic Imaging Scanning Tunneling Microscopy (SI-STM) measurements have previously been applied to the study of the heavy-fermion system CeCoIn5 to examine the superconducting gap structure and band dispersions via quasiparticle intereference. Here we directly measure the dispersing electron bands with angle-resolved photoelectron spectroscopy (ARPES) and compare with first-principles electronic structure calculations. By autocorrelating the ARPES-resolved bands with themselves we can measure the potential q vectors and discern exactly which bands the STM is measuring. We find that the STM results are dominated by scattering associated with a cloverleaf shaped band centered at the zone corners. This same band is also a viable candidate to host the superconducting gap. The electronic structure calculations indicate that this region of the Fermi surface involves significant contributions from the Co d electrons, an indication that the superconductivity in these materials is more three dimensional than that found in the related unconventional superconductors, the cuprates and the pnictides.

Original language	English
Article number	205112
Number of pages	7
Journal	Physical Review B
Volume	102
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevB.102.205112
Publication status	Published - 11 Nov 2020
Publication type	A1 Journal article-refereed

Funding

Work at Brookhaven National Laboratory was supported by the US Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-SC0012704. The work at Northeastern University was supported by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences Grant No. DE-FG02-07ER46352, and benefited from Northeastern University's Advanced Scientific Computation Center (ASCC) and the NERSC supercomputing center through DOE Grant No. DE-AC02-05CH11231. This work is based on experiments performed at the Swiss Light Source (SLS), located at the Paul Scherrer Institute,Villigen, Switzerland. The authors would like to thank Nick Plumb and Ming Shi for help with the beamline.

Publication forum classification

Publication forum level 2

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.102.205112

Superconducting pairing mechanism
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Final published version, 3.38 MBLicence: Unspecified

https://urn.fi/URN:NBN:fi:tuni-202201201485Licence: Unspecified

Cite this

@article{bc7e956ddada4bb1a2ea94e6c6ef7431,

title = "Superconducting pairing mechanism in CeCoIn5 revisited",

abstract = "Spectroscopic Imaging Scanning Tunneling Microscopy (SI-STM) measurements have previously been applied to the study of the heavy-fermion system CeCoIn5 to examine the superconducting gap structure and band dispersions via quasiparticle intereference. Here we directly measure the dispersing electron bands with angle-resolved photoelectron spectroscopy (ARPES) and compare with first-principles electronic structure calculations. By autocorrelating the ARPES-resolved bands with themselves we can measure the potential q vectors and discern exactly which bands the STM is measuring. We find that the STM results are dominated by scattering associated with a cloverleaf shaped band centered at the zone corners. This same band is also a viable candidate to host the superconducting gap. The electronic structure calculations indicate that this region of the Fermi surface involves significant contributions from the Co d electrons, an indication that the superconductivity in these materials is more three dimensional than that found in the related unconventional superconductors, the cuprates and the pnictides.",

author = "Reber, \{T. J.\} and Rameau, \{J. D.\} and C. Petrovic and Hasnain Hafiz and M. Lindroos and A. Bansil and Johnson, \{P. D.\}",

note = "Funding Information: Work at Brookhaven National Laboratory was supported by the US Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-SC0012704. The work at Northeastern University was supported by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences Grant No. DE-FG02-07ER46352, and benefited from Northeastern University's Advanced Scientific Computation Center (ASCC) and the NERSC supercomputing center through DOE Grant No. DE-AC02-05CH11231. This work is based on experiments performed at the Swiss Light Source (SLS), located at the Paul Scherrer Institute,Villigen, Switzerland. The authors would like to thank Nick Plumb and Ming Shi for help with the beamline. Publisher Copyright: {\textcopyright} 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = nov,

day = "11",

doi = "10.1103/PhysRevB.102.205112",

language = "English",

volume = "102",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "20",

}

TY - JOUR

T1 - Superconducting pairing mechanism in CeCoIn5 revisited

AU - Reber, T. J.

AU - Rameau, J. D.

AU - Petrovic, C.

AU - Hafiz, Hasnain

AU - Lindroos, M.

AU - Bansil, A.

AU - Johnson, P. D.

N1 - Funding Information: Work at Brookhaven National Laboratory was supported by the US Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-SC0012704. The work at Northeastern University was supported by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences Grant No. DE-FG02-07ER46352, and benefited from Northeastern University's Advanced Scientific Computation Center (ASCC) and the NERSC supercomputing center through DOE Grant No. DE-AC02-05CH11231. This work is based on experiments performed at the Swiss Light Source (SLS), located at the Paul Scherrer Institute,Villigen, Switzerland. The authors would like to thank Nick Plumb and Ming Shi for help with the beamline. Publisher Copyright: © 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/11/11

Y1 - 2020/11/11

N2 - Spectroscopic Imaging Scanning Tunneling Microscopy (SI-STM) measurements have previously been applied to the study of the heavy-fermion system CeCoIn5 to examine the superconducting gap structure and band dispersions via quasiparticle intereference. Here we directly measure the dispersing electron bands with angle-resolved photoelectron spectroscopy (ARPES) and compare with first-principles electronic structure calculations. By autocorrelating the ARPES-resolved bands with themselves we can measure the potential q vectors and discern exactly which bands the STM is measuring. We find that the STM results are dominated by scattering associated with a cloverleaf shaped band centered at the zone corners. This same band is also a viable candidate to host the superconducting gap. The electronic structure calculations indicate that this region of the Fermi surface involves significant contributions from the Co d electrons, an indication that the superconductivity in these materials is more three dimensional than that found in the related unconventional superconductors, the cuprates and the pnictides.

AB - Spectroscopic Imaging Scanning Tunneling Microscopy (SI-STM) measurements have previously been applied to the study of the heavy-fermion system CeCoIn5 to examine the superconducting gap structure and band dispersions via quasiparticle intereference. Here we directly measure the dispersing electron bands with angle-resolved photoelectron spectroscopy (ARPES) and compare with first-principles electronic structure calculations. By autocorrelating the ARPES-resolved bands with themselves we can measure the potential q vectors and discern exactly which bands the STM is measuring. We find that the STM results are dominated by scattering associated with a cloverleaf shaped band centered at the zone corners. This same band is also a viable candidate to host the superconducting gap. The electronic structure calculations indicate that this region of the Fermi surface involves significant contributions from the Co d electrons, an indication that the superconductivity in these materials is more three dimensional than that found in the related unconventional superconductors, the cuprates and the pnictides.

U2 - 10.1103/PhysRevB.102.205112

DO - 10.1103/PhysRevB.102.205112

M3 - Article

AN - SCOPUS:85096114037

SN - 2469-9950

VL - 102

JO - Physical Review B

JF - Physical Review B

IS - 20

M1 - 205112

ER -

Superconducting pairing mechanism in CeCoIn5 revisited

Abstract

Funding

Publication forum classification

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this