Siegert, Benjamin and Donarini, Andrea and Grifoni, Milena (2013) The role of the tip symmetry on the STM topography of pi-conjugated molecules. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 250 (11). pp. 2444-2451. ISSN 0370-1972, 1521-3951
Full text not available from this repository. (Request a copy)Abstract
We present an STM theory based on the reduced density matrix (RDM) formalism which is able to describe transport properties of an STM junction for -conjugated molecules on thin insulating films. It combines a very popular derivation of STM tunneling matrix elements (), based on Bardeen's tunneling formalism (), with a generalized master equation approach for interacting molecular systems. We show that this method allows the efficient implementation of different tip symmetries in STM simulations. With the example of hydrogen phthalocyanine (H-2 Pc), we study the influence of s- and p-wave tip symmetries on the constant-height current maps of -conjugated molecules. Constant-height STM images evaluated at the cationic resonance of H-2 Pc. Left image computed by using an s-wave tip and right image for a linear combination of p(x) and p(y) states.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING-TUNNELING-MICROSCOPY; METAL-SURFACES; MODEL; electronic transport; molecular electronics; reduced density matrix; scanning tunneling microscopy |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Mar 2020 12:39 |
| Last Modified: | 25 Mar 2020 12:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15697 |
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