P-wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor

A. Di Bernardo; O. Millo; M. Barbone; H. Alpern; Y. Kalcheim; U. Sassi; A. K. Ott; D. De Fazio; D. Yoon; M. Amado; A. C. Ferrari; J. Linder; J. W.A. Robinson

doi:10.1038/ncomms14024

P-wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor

A. Di Bernardo, O. Millo, M. Barbone, H. Alpern, Y. Kalcheim, U. Sassi, A. K. Ott, D. De Fazio, D. Yoon, M. Amado, A. C. Ferrari, J. Linder, J. W.A. Robinson^*

^*Corresponding author for this work

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

81 Scopus citations

Abstract

Electron pairing in the vast majority of superconductors follows the Bardeen-Cooper-Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state with an s-wave symmetry. Unconventional superconductivity was predicted in single-layer graphene (SLG), with the electrons pairing with a p-wave or chiral d-wave symmetry, depending on the position of the Fermi energy with respect to the Dirac point. By placing SLG on an electron-doped (non-chiral) d-wave superconductor and performing local scanning tunnelling microscopy and spectroscopy, here we show evidence for a p-wave triggered superconducting density of states in SLG. The realization of unconventional superconductivity in SLG offers an exciting new route for the development of p-wave superconductivity using two-dimensional materials with transition temperatures above 4.2 K.

Original language	English
Article number	14024
Journal	Nature Communications
Volume	8
DOIs	https://doi.org/10.1038/ncomms14024
State	Published - 19 Jan 2017
Externally published	Yes

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title = "P-wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor",

abstract = "Electron pairing in the vast majority of superconductors follows the Bardeen-Cooper-Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state with an s-wave symmetry. Unconventional superconductivity was predicted in single-layer graphene (SLG), with the electrons pairing with a p-wave or chiral d-wave symmetry, depending on the position of the Fermi energy with respect to the Dirac point. By placing SLG on an electron-doped (non-chiral) d-wave superconductor and performing local scanning tunnelling microscopy and spectroscopy, here we show evidence for a p-wave triggered superconducting density of states in SLG. The realization of unconventional superconductivity in SLG offers an exciting new route for the development of p-wave superconductivity using two-dimensional materials with transition temperatures above 4.2 K.",

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AU - Di Bernardo, A.

AU - Millo, O.

AU - Barbone, M.

AU - Alpern, H.

AU - Kalcheim, Y.

AU - Sassi, U.

AU - Ott, A. K.

AU - De Fazio, D.

AU - Yoon, D.

AU - Amado, M.

AU - Ferrari, A. C.

AU - Linder, J.

AU - Robinson, J. W.A.

PY - 2017/1/19

Y1 - 2017/1/19

N2 - Electron pairing in the vast majority of superconductors follows the Bardeen-Cooper-Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state with an s-wave symmetry. Unconventional superconductivity was predicted in single-layer graphene (SLG), with the electrons pairing with a p-wave or chiral d-wave symmetry, depending on the position of the Fermi energy with respect to the Dirac point. By placing SLG on an electron-doped (non-chiral) d-wave superconductor and performing local scanning tunnelling microscopy and spectroscopy, here we show evidence for a p-wave triggered superconducting density of states in SLG. The realization of unconventional superconductivity in SLG offers an exciting new route for the development of p-wave superconductivity using two-dimensional materials with transition temperatures above 4.2 K.

AB - Electron pairing in the vast majority of superconductors follows the Bardeen-Cooper-Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state with an s-wave symmetry. Unconventional superconductivity was predicted in single-layer graphene (SLG), with the electrons pairing with a p-wave or chiral d-wave symmetry, depending on the position of the Fermi energy with respect to the Dirac point. By placing SLG on an electron-doped (non-chiral) d-wave superconductor and performing local scanning tunnelling microscopy and spectroscopy, here we show evidence for a p-wave triggered superconducting density of states in SLG. The realization of unconventional superconductivity in SLG offers an exciting new route for the development of p-wave superconductivity using two-dimensional materials with transition temperatures above 4.2 K.

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P-wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor

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