TY - JOUR
T1 - Local measurement of the eliashberg function of Pb islands
T2 - Enhancement of electron-phonon coupling by quantum well states
AU - Schackert, Michael
AU - Märkl, Tobias
AU - Jandke, Jasmin
AU - Hölzer, Martin
AU - Ostanin, Sergey
AU - Gross, Eberhard K.U.
AU - Ernst, Arthur
AU - Wulfhekel, Wulf
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/1/29
Y1 - 2015/1/29
N2 - Inelastic tunneling spectroscopy of Pb islands on Cu(111) obtained by scanning tunneling microscopy below 1 K provides a direct access to the local Eliashberg function of the islands with high energy resolution. The Eliashberg function describes the electron-phonon interaction causing conventional superconductivity. The measured Eliashberg function strongly depends on the local thickness of the Pb nanostructures and shows a sharp maximum when quantum well states of the Pb islands come close to the Fermi energy. Ab initio calculations reveal that this is related to enhanced electron-phonon coupling at these thicknesses.
AB - Inelastic tunneling spectroscopy of Pb islands on Cu(111) obtained by scanning tunneling microscopy below 1 K provides a direct access to the local Eliashberg function of the islands with high energy resolution. The Eliashberg function describes the electron-phonon interaction causing conventional superconductivity. The measured Eliashberg function strongly depends on the local thickness of the Pb nanostructures and shows a sharp maximum when quantum well states of the Pb islands come close to the Fermi energy. Ab initio calculations reveal that this is related to enhanced electron-phonon coupling at these thicknesses.
UR - http://www.scopus.com/inward/record.url?scp=84921912130&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.114.047002
DO - 10.1103/PhysRevLett.114.047002
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C2 - 25679904
AN - SCOPUS:84921912130
SN - 0031-9007
VL - 114
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 047002
ER -