Model ofelectrontunnelingcoupledtotorsionalvibrations:Exact solution andstudyofperformanceofapproximationmethods
Gráf, Lukáš; Čížek, Martin
A twodimensionalmodelfortheelectroninteractionwithmolecularvibrationsinmolecularjunctionsis
proposed. Alternativelythemodelcanbeappliedtotunnelingthroughacylindricalnano-structure.The
transmission functioniscalculatedaccuratelynumerically.Theexactresultsarethencomparedwith
variousapproximations:(1)completelyfrozenvibrationsforverylightmolecule,(2)Chaseapproxima-
tion forveryheavymolecule,and(3)discrete-state-in-continuummodelinresonantregime.The
validityoftheseapproximationsisdiscussedintermsofthecharacteristictime-scalesandcoupling
strengths. Theexcitationofthevibrationaldegreeoffreedomandtheemergenceofprominentthreshold
structures inthestrongcouplingregimearediscussedinmoredetails
| type: | article |
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| journal: | Physica E |
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| volume: | 63 |
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| pages: | 36 |
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| year: | 2014 |
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| grants: | Vibrational and dissociation dynamics of molecular systems in electronic continuum, GAČR 208/10/1281; 2010-2014; hlavní řešitel: Martin Čížek
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