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Voltage dependence of the tunnelling current: an exact expression
Author(s) -
Noguera Claudine
Publication year - 1988
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1988.tb01356.x
Subject(s) - quantum tunnelling , observability , scanning tunneling microscope , hamiltonian (control theory) , connection (principal bundle) , physics , chemistry , voltage , condensed matter physics , quantum mechanics , mathematics , geometry , mathematical optimization
SUMMARY An exact expression for the tunnelling current measured with a scanning tunnelling microscope (STM) is obtained. It clarifies the information deducible from the ‘spectroscopic mode’ of the STM and raises the question of the observability of surface states. The connection with the Transfer Hamiltonian approach is made, and the conditions of validity of the latter are analysed.