Direct measurement of quantum levels in InAs/GaAs QDs by BEEM / BEES

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00377299" target="_blank" >RIV/68378271:_____/12:00377299 - isvavai.cz</a>
Alternative codes found
RIV/67985882:_____/12:00377299
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Direct measurement of quantum levels in InAs/GaAs QDs by BEEM / BEES
Original language description
Structures with self assembled quantum dots were prepared by low pressure MOVPE using Stranski-Krastanow growth mode. One single layer of InAs QDs confined between thin GaAs layers was embedded in ternary AlGaAs material. GaAs buffer and capping layers were also used. QDs were detected by ballistic electron emission microscopy BEEM. Ballistic current IB through QDs is much higher than outside of QDs, and QDs look like dark spots. Ballistic electron emission microscopy BEES characteristics IB-V were measured on individual QDs. Derivation dIB/dV corresponds to the density of states. Minima in the density of states are assigned to the positions of the quantum levels in the QD. The spectroscopic characteristics of individual QDs were examined. One-electronp1-like state, one- and two-electron ground states and excited two-electron states were found. The Coulomb interaction and exchange energies between two electrons in QDs were also determined.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
17th Conference of Czech and Slovak Physicists Proceedings
ISBN
978-80-970625-4-5
ISSN
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e-ISSN
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Number of pages
3
Pages from-to
105-107
Publisher name
Slovak Physical Society
Place of publication
Košice
Event location
Žilina
Event date
Sep 5, 2011
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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