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Vibrational effects in laser driven molecular wires | | Jörg Lehmann
; Sigmund Kohler
; Volkhard May
; Peter Hänggi
; | | Date: |
24 Mar 2004 | | Journal: | J. Chem. Phys. 121, 2278 (2004) DOI: 10.1063/1.1768154 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Chemical Physics | cond-mat.mes-hall physics.chem-ph | | Abstract: | The influence of an electron-vibrational coupling on the laser control of electron transport through a molecular wire that is attached to several electronic leads is investigated. These molecular vibrational modes induce an effective electron-electron interaction. In the regime where the wire electrons couple weakly to both the external leads and the vibrational modes, we derive within a Hartree-Fock approximation a nonlinear set of quantum kinetic equations. The quantum kinetic theory is then used to evaluate the laser driven, time-averaged electron current through the wire-leads contacts. This novel formalism is applied to two archetypical situations in the presence of electron-vibrational effects, namely, (i) the generation of a ratchet or pump current in a symmetrical molecule by a harmonic mixing field and (ii) the laser switching of the current through the molecule. | | Source: | arXiv, cond-mat/0403614 | | Services: | Forum | Review | PDF | Favorites | |
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