Sobczyk, Sandra and Donarini, Andrea and Grifoni, Milena (2012) Theory of STM junctions for pi-conjugated molecules on thin insulating films. PHYSICAL REVIEW B, 85 (20): 205408. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
A microscopic theory of the transport in a scanning tunneling microscope (STM) setup is introduced for pi-conjugated molecules on insulating films, based on the density matrix formalism. A key role is played in the theory by the energy dependent tunneling rates which account for the coupling of the molecule to the tip and to the substrate. In particular, we analyze how the geometrical differences between the localized tip and extended substrate are encoded in the tunneling rate and influence the transport characteristics. Finally, using benzene as an example of a planar, rotationally symmetric molecule, we calculate the STM current-voltage characteristics and current maps and analyze them in terms of few relevant angular momentum channels.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING-TUNNELING-MICROSCOPY; METAL-SURFACES; CONDUCTANCE; ORBITALS; MODEL; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 May 2020 05:33 |
| Last Modified: | 14 May 2020 05:33 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18748 |
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