Polaronic transport through molecular quantum dots. Charging-induced NDR and rectification

• Autorzy: Walczak K.
• Konferencja: Conference New Materials for Magnetoelectronics, Będlewo, 3-6 May 2006
• Języki publikacji: EN

Abstrakty

EN

The polaronic transport through molecules weakly connected to metallic electrodes in the nonlinear response regime has been studied. Molecule itself is treated as a quantum dot with discrete energy levels, its connection to the electrodes is described within the wide-band approximation, while the charging is incorporated by means of the self-consistent potential. Non-perturbative computational scheme, used in this work, is based on the Green's function theory within the framework of polaron transformation. This method transforms the many-body electron-phonon interaction problem into a one-body multi-channel single-electron scattering problem with occupation of polaron levels calculated in a self-consistent way. In particular, three different phenomena are discussed in detail resulting from charging in polaronic transport via discrete quantum states: the suppression of the current at higher voltages, negative differential resistance (NDR effect), and rectification.

Słowa kluczowe

EN

polaronic transport; decoherence; molecular quantum dot; negative differential resistance; NDR; rectification

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 2
• Strony: 519--525
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Walczak K.

• Institute of Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland

Bibliografia

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