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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Shape control of CdSe nanocrystals

Article Abstract:

Control of the growth kinetics of the II-VI semiconductor cadmium selenide can be used to alter the shapes of the resulting particles from an almost spherical morphology to a rod-like one. Analysis of the growth kinetics of the quantum rods indicates that the average aspect ratio rises quickly immediately after injection, with the length of the short axis remaining almost constant. The ability to control the shapes of semiconductor nanocrystals gives an opportunity to further investigate theories of quantum confinement. It is predicted that near degeneracies in spherical dots are lifted by elongation of the unique axis.

Author: Peng, Xiaogang, Manna, Liberato, Yang, Weidong, Wickham, Juanita, Scher, Erik, Kadavanich, Andreas, Alivisatos, A.P.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000

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Observation of quasiparticles with one-fifth of an electron's charge

Article Abstract:

The first Landau level in the fractional quantum Hall (FQH) regime is partly populated. The Hall conductance shows plateaux or fractional states giving rise to fractionally charged quasiparticles. Quasiparticles with a charge of e/5 in the 2/5 fractional state have been observed, from measurements of shot noise in a two dimensional electron gas, indicating that charge can be independently measured of conductance in the fractional quantum Hall regime.

Author: Heiblum, M., Umansky, V., Reznikov, M., de Picciotto, R., Griffiths, T.G.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
Hall effect

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Many-body and correlation effects in semiconductors

Article Abstract:

Research examining the importance of many-body interactions for semiconductors and other condensed-matter systems is presented. Particular attention is given to the functionality of interactions between quasiparticles and their dominance of the nonlinear optical semiconducting.

Author: Chemla, D.S., Shah, Jagdeep
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
Many-body problem, Many body problem

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Subjects list: Optical properties, Semiconductors, Research, Quasiparticles (Physics)
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