2007/11/30 by Juntao Song, Qing‐Feng Sun, Qing-feng Sun +3 · 4 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Condensed matter physics #Dephasing #Electron #Lambda #Molecular Junctions and Nanostructures #Phase (matter) #Phonon #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Scattering #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.77.035309
published in Physical Review B 77(3) (American Physical Society) · 8 pages, 6 figures, accepted by Phys. Rev. B
arxiv created 2007/11/30 · openalex publication_date 2008/01/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The influence of electron-phonon interaction on the transmission phase shift of an electron passing through a quantum dot is investigated by using scattering theory. The transmission phase versus the intradot level shows a series of phonon-induced dips. These dips are highly sensitive to the electron-phonon interaction strength \ensuremathλ, and they are much more pronounced than phonon-assisted subpeaks appearing in the conductance. Phonon-induced dephasing is also studied, and the results show that the dephasing probability Td monotonically increases with the electron-phonon interaction strength \ensuremathλ. The dephasing probability Td\ensuremath∝\ensuremathλ2 for small \ensuremathλ but Td\ensuremath∝\ensuremathλ at large \ensuremathλ.