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- Title
- A single-atom transistor
- Author(s)
- MartinFuechsle; 류훈
- Publication Year
- 2012-02-19
- Abstract
- Theabilitytocontrolmatterattheatomicscaleandbuilddeviceswithatomicprecisioniscentraltonanotechnology.Thescanningtunnellingmicroscopecanmanipulateindividualatomsandmoleculesonsurfaces,butthemanipulationofsilicontomakeatomic-scalelogiccircuitshasbeenhamperedbythecovalentnatureofitsbonds.Resist-basedstrategieshaveallowedtheformationofatomic-scalestructuresonsiliconsurfaces,butthefabricationofworkingdevices-suchastransistorswithextremelyshortgatelengths,spin-basedquantumcomputersandsolitarydopantoptoelectronicdevices-requirestheabilitytopositionindividualatomsinasiliconcrystalwithatomicprecision.Here,weuseacombinationofscanningtunnellingmicroscopyandhydrogen-resistlithographytodemonstrateasingle-atomtransistorinwhichanindividualphosphorusdopantatomhasbeendeterministicallyplacedwithinanepitaxialsilicondevicearchitecturewithaspatialaccuracyofonelatticesite.Thetransistoroperatesatliquidheliumtemperatures,andmillikelvinelectrontransportmeasurementsconfirmthepresenceofdiscretequantumlevelsintheenergyspectrumofthephosphorusatom.Wefindachargingenergythatisclosetothebulkvalue,previouslyonlyobservedbyopticalspectroscopy.
- Keyword
- Quantum-computer; STMFabrication; Tight-bindingModel; Nanoelectronics
- Journal Title
- NatureNanotechnology
- Citation Volume
- 7
- ISSN
- 1748-3387
- Files in This Item:
- There are no files associated with this item.
- Appears in Collections:
- 7. KISTI 연구성과 > 학술지 발표논문
