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공공누리This item is licensed Korea Open Government License

Title
Feasibility, accuracy, and performance of contact block reduction method for multi-band simulations of ballistic quantum transport
Author(s)
류훈
Publication Year
2012-03-21
Abstract
Numericalutilitiesofthecontactblockreduction(CBR)methodinevaluatingtheretardedGreen’sfunctionarediscussedfor3Dmulti-bandopensystemsthatarerepresentedbytheatomictight-binding(TB)andcontinuumk.p(KP)bandmodel.Itisshownthatthemethodologytoapproximatesolutionsofopensystems,whichhasbeenalreadyreportedforthesingle-bandeffectivemassmodel,cannotbedirectlyusedforatomicTBsystems,sincetheuseofasetofzincblendecrystalgridsmakestheinter-couplingmatrixnon-invertible.WederiveandtestanalternativewithwhichtheCBRmethodcanbestillpracticalinsolvingTBsystems.Thismulti-bandCBRmethodisvalidatedbyaproofofprinciplesonsmallsystemsandalsoshowntoworkexcellentwiththeKPapproach.Furtherdetailedanalysisontheaccuracy,speed,andscalabilityonhighperformancecomputingclustersisperformedwithrespecttothereferenceresultsobtainedbythestate-of-the-artrecursiveGreen’sfunctionandwavefunctionalgorithm.ThisworkshowsthattheCBRmethodcouldbeparticularlyusefulincalculatingresonanttunnelingfeatures,butshowsalimitedpracticalityinsimulatingfieldeffecttransistors(FETs)whenthesystemisdescribedwiththeatomicTBmodel.CoupledtotheKPmodel,however,theutilityoftheCBRmethodcanbeextendedtosimulationsofnanowireFETs.
Keyword
QuantumTransport; ContactBlockReduction; Multi-bandModel; Nanoelectronics
Journal Title
JournalofAppliedPhysics
Citation Volume
111
ISSN
0021-8979
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7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14087
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