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Preparation of InAs/GaAs quantum dots for BEEM/BEES

SYSNO ASEP	0367158
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Preparation of InAs/GaAs quantum dots for BEEM/BEES
Author(s)	Hulicius, Eduard (FZU-D)_{RID, ORCID, SAI} Vaniš, Jan (URE-Y)_RID Pangrác, Jiří (FZU-D)_{RID, ORCID, SAI} Walachová, Jarmila (URE-Y) Vyskočil, Jan (FZU-D)_RID Oswald, Jiří (FZU-D)_{RID, ORCID} Hospodková, Alice (FZU-D)_{RID, ORCID, SAI}
Source Title	EWMOVPE XIV. - Wroclaw : Printing house of Wroclaw University of Technology, 2011 / Prazmowska J. - ISBN 978-83-7493-599-9
Pages	s. 263-266
Number of pages	4 s.
Action	European Workshop on Metalorganic Vapor Phase Epitaxy /14./
Event date	05.06.2011-08.06.2011
VEvent location	Wrocław
Country	PL - Poland
Event type	EUR
Language	eng - English
Country	PL - Poland
Keywords	InAs/GaAs ; quantum dots ; BEEM/BEES
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GAP102/10/1201 GA ČR - Czech Science Foundation (CSF)
	GA202/09/0676 GA ČR - Czech Science Foundation (CSF)
	GPP102/11/P824 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100521 - FZU-D (2005-2011)
	AV0Z20670512 - URE-Y (2005-2011)
Annotation	Self-assembled InAs/GaAs QD layer embedded in AlGaAs heterostructure was detected by ballistic electron emission microscopy (BEEM). Ballistic current 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 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-electron p1-like state, one-electron 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.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2012

Number of the records: 1