Measuring the phonon-assisted spectral function by using a nonequilibrium three-terminal single-molecular device

2007/05/17 by Juntao Song, Qing‐Feng Sun, Qing-feng Sun +2 · 2 citations
Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Biasing #Computer science #Condensed matter physics #Conductance #Energy (signal processing) #Function (biology) #Matching (statistics) #Materials science #Mathematics #Molecular Junctions and Nanostructures #Non-equilibrium thermodynamics #Optoelectronics #Phonon #Physics #Quantum and electron transport phenomena #Quantum mechanics #Spectral function #Statistical physics #Terminal (telecommunication) #Transistor #Voltage #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.75.195320

published as Phys. Rev. B 75, 195320 (2007) · 9 pages, 5 figures

openalex publication_date 2007/05/17 · arxiv created 2007/11/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The electron transport through a three-terminal single-molecular transistor (SMT) is theoretically studied. We find that the differential conductance of the third and weakly coupled terminal versus its voltage matches well with the spectral function versus the energy when certain conditions are met. Particularly, this excellent matching is maintained even for the complicated structure of the phonon-assisted side peaks. Thus, this device offers an experimental approach to explore the shape of the phonon-assisted spectral function in detail. In addition, we discuss the conditions of a perfect matching. The results show that at low temperatures, the matching survives regardless of the bias and the energy levels of the SMT. However, at high temperatures, the matching is destroyed.

Citations

• Time-dependent transport in interacting and non-interacting mesoscopic systems
• Landauer formula for the current through an interacting electron region
• Phonon effects in molecular transistors: Quantal and classical treatment
• Three-terminal scanning tunneling spectroscopy of suspended carbon nanotubes

Cited by

• Transmission phase shift of phonon-assisted tunneling through a quantum dot
• One-dimensional quantum channel in a graphene line defect

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