Quantum transport in a single molecular transistor at finite temperature

Abstract We study quantum transport in a single molecular transistor in which the central region consists of a single-level quantum dot and is connected to two metallic leads that act as a source and a drain respectively. The quantum dot is considered to be under the influence of electron–electron a...

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Autores principales:	Manasa Kalla, Narasimha Raju Chebrolu, Ashok Chatterjee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9024d2f1526e49a3a4977a243b899b48
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spelling	oai:doaj.org-article:9024d2f1526e49a3a4977a243b899b482021-12-02T14:59:15ZQuantum transport in a single molecular transistor at finite temperature10.1038/s41598-021-89436-52045-2322https://doaj.org/article/9024d2f1526e49a3a4977a243b899b482021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89436-5https://doaj.org/toc/2045-2322Abstract We study quantum transport in a single molecular transistor in which the central region consists of a single-level quantum dot and is connected to two metallic leads that act as a source and a drain respectively. The quantum dot is considered to be under the influence of electron–electron and electron–phonon interactions. The central region is placed on an insulating substrate that acts as a heat reservoir that interacts with the quantum dot phonon giving rise to a damping effect to the quantum dot. The electron–phonon interaction is decoupled by applying a canonical transformation and then the spectral density of the quantum dot is calculated from the resultant Hamiltonian by using Keldysh Green function technique. We also calculate the tunneling current density and differential conductance to study the effect of quantum dissipation, electron correlation and the lattice effects on quantum transport in a single molecular transistor at finite temperature.Manasa KallaNarasimha Raju ChebroluAshok ChatterjeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Manasa Kalla Narasimha Raju Chebrolu Ashok Chatterjee Quantum transport in a single molecular transistor at finite temperature
description	Abstract We study quantum transport in a single molecular transistor in which the central region consists of a single-level quantum dot and is connected to two metallic leads that act as a source and a drain respectively. The quantum dot is considered to be under the influence of electron–electron and electron–phonon interactions. The central region is placed on an insulating substrate that acts as a heat reservoir that interacts with the quantum dot phonon giving rise to a damping effect to the quantum dot. The electron–phonon interaction is decoupled by applying a canonical transformation and then the spectral density of the quantum dot is calculated from the resultant Hamiltonian by using Keldysh Green function technique. We also calculate the tunneling current density and differential conductance to study the effect of quantum dissipation, electron correlation and the lattice effects on quantum transport in a single molecular transistor at finite temperature.
format	article
author	Manasa Kalla Narasimha Raju Chebrolu Ashok Chatterjee
author_facet	Manasa Kalla Narasimha Raju Chebrolu Ashok Chatterjee
author_sort	Manasa Kalla
title	Quantum transport in a single molecular transistor at finite temperature
title_short	Quantum transport in a single molecular transistor at finite temperature
title_full	Quantum transport in a single molecular transistor at finite temperature
title_fullStr	Quantum transport in a single molecular transistor at finite temperature
title_full_unstemmed	Quantum transport in a single molecular transistor at finite temperature
title_sort	quantum transport in a single molecular transistor at finite temperature
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9024d2f1526e49a3a4977a243b899b48
work_keys_str_mv	AT manasakalla quantumtransportinasinglemoleculartransistoratfinitetemperature AT narasimharajuchebrolu quantumtransportinasinglemoleculartransistoratfinitetemperature AT ashokchatterjee quantumtransportinasinglemoleculartransistoratfinitetemperature
_version_	1718389214350934016

Quantum transport in a single molecular transistor at finite temperature

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