Premium
Particle–hole asymmetry in the scanning tunneling spectroscopy of the high temperature superconductors
Author(s) -
Gorczyca Anna,
Krawiec Mariusz,
Maśka Maciej M.,
Mierzejewski Marcin
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200674642
Subject(s) - asymmetry , condensed matter physics , superconductivity , quantum tunnelling , coulomb , anisotropy , coupling (piping) , particle (ecology) , spectroscopy , physics , high temperature superconductivity , scanning tunneling spectroscopy , substrate (aquarium) , scanning tunneling microscope , materials science , quantum mechanics , geology , metallurgy , oceanography , electron
Abstract There is still no consensus on the mechanism that is responsible for a particle–hole asymmetry observed in scanning tunneling spectroscopy of high‐temperature superconductors. According to the most popular hypothesis this asymmetry results from strong Coulomb correlations in a nearly half‐filled band. In the present paper we propose another mechanism that leads to such asymmetry. It originates from the coupling between the superconductor and the substrate that the system is deposed on. We show that this coupling gives rise to the particle–hole asymmetry only in the case of an anisotropic superconductivity. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)