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

Fysiikka

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

1 Sitaatiot (Scopus)

18 Lataukset (Pure)

Abstrakti

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.

Alkuperäiskieli	Englanti
Artikkeli	205112
Sivumäärä	7
Julkaisu	Physical Review B
Vuosikerta	102
Numero	20
DOI - pysyväislinkit	https://doi.org/10.1103/PhysRevB.102.205112
Tila	Julkaistu - 11 marrask. 2020
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

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.

Julkaisufoorumi-taso

Jufo-taso 2

!!ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Pääsy asiakirjaan

10.1103/PhysRevB.102.205112

Superconducting pairing mechanism
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Final published version, 3,38 MBLisenssi: Unspecified

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

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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.",

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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

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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.

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Superconducting pairing mechanism in CeCoIn5 revisited

Abstrakti

Rahoitus

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!!ASJC Scopus subject areas

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