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Article: Gauge-invariant and current-continuous microscopic ac quantum transport theory

TitleGauge-invariant and current-continuous microscopic ac quantum transport theory
Authors
Issue Date2013
Publisherspringer.
Citation
The European Physical Journal B, 2013, v. 86 How to Cite?
AbstractThere had been consensus on what the accurate ac quantum transport theory was until some recent works challenged the conventional wisdom. Basing on the non-equilibrium Green’s function formalism for time-dependent quantum transport, we derive an expression for the dynamic admittance that satisfies gauge invariance and current continuity, and clarify the key concept in the field. The validity of our new formalism is verified by first-principles calculation of the transient current through a carbon-nanotube-based device under the time-dependent bias voltage. Our work establishes firmly the correct numerical approach to calculate dynamic response of emerging electronic devices.
Persistent Identifierhttp://hdl.handle.net/10722/202588
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZHANG, Jen_US
dc.contributor.authorYIN, Zen_US
dc.contributor.authorZheng, Xen_US
dc.contributor.authorYan, CYen_US
dc.contributor.authorChen, Gen_US
dc.date.accessioned2014-09-19T08:41:46Z-
dc.date.available2014-09-19T08:41:46Z-
dc.date.issued2013en_US
dc.identifier.citationThe European Physical Journal B, 2013, v. 86en_US
dc.identifier.urihttp://hdl.handle.net/10722/202588-
dc.description.abstractThere had been consensus on what the accurate ac quantum transport theory was until some recent works challenged the conventional wisdom. Basing on the non-equilibrium Green’s function formalism for time-dependent quantum transport, we derive an expression for the dynamic admittance that satisfies gauge invariance and current continuity, and clarify the key concept in the field. The validity of our new formalism is verified by first-principles calculation of the transient current through a carbon-nanotube-based device under the time-dependent bias voltage. Our work establishes firmly the correct numerical approach to calculate dynamic response of emerging electronic devices.en_US
dc.languageengen_US
dc.publisherspringer.en_US
dc.relation.ispartofThe European Physical Journal Ben_US
dc.rightsThe original publication is available at www.springerlink.comen_US
dc.titleGauge-invariant and current-continuous microscopic ac quantum transport theoryen_US
dc.typeArticleen_US
dc.identifier.emailChen, G: ghc@yangtze.hku.hken_US
dc.identifier.authorityChen, G=rp00671en_US
dc.identifier.doi10.1140/epjb/e2013-40325-7en_US
dc.identifier.hkuros237579en_US
dc.identifier.volume86en_US
dc.identifier.isiWOS:000325451300003-

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