EnglishThe interpretation of scanning tunneling microscopy (STM) images of adsorbed molecules requires a redefinition of the current, that goes beyond the limitations imposed by the Transfer Hamiltonian formalism. Here we discuss two expressions for the tunneling current we derived, both suitable for situations in which an adsorbate is placed between tip and substrate. The former is still based on a perturbative approach, but emphasizes the contributions to the STM current due to the adsorbate. The latter is an exact expression obtained by treating the STM current like an electron transport process. This allows the inclusion of both the quantum aspects of the transport and thermal effects, and it can be used in widely different situations.
Scanning tunneling microscopy of adsorbed molecules: theoretical considerations / Biscarini, Fabio; Bustamante, C.; Kenkre, V. M.. - STAMPA. - 1639(1992), pp. 111-118. ((Intervento presentato al convegno SPIE Meeting 1992 tenutosi a Los Angeles, CA nel 19/1/1992.
| Data di pubblicazione: | 1992 |
| Titolo: | Scanning tunneling microscopy of adsorbed molecules: theoretical considerations |
| Autore/i: | Biscarini, Fabio; Bustamante, C.; Kenkre, V. M. |
| Autore/i UNIMORE: | |
| Nome del convegno: | SPIE Meeting 1992 |
| Luogo del convegno: | Los Angeles, CA |
| Data del convegno: | 19/1/1992 |
| Rivista: | PROCEEDINGS OF SPIE, THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING |
| Volume: | 1639 |
| Pagina iniziale: | 111 |
| Pagina finale: | 118 |
| Citazione: | Scanning tunneling microscopy of adsorbed molecules: theoretical considerations / Biscarini, Fabio; Bustamante, C.; Kenkre, V. M.. - STAMPA. - 1639(1992), pp. 111-118. ((Intervento presentato al convegno SPIE Meeting 1992 tenutosi a Los Angeles, CA nel 19/1/1992. |
| Tipologia | Relazione in Atti di Convegno |
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