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Your search keyword '"Frans Blom"' showing total 2 results
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2 results on '"Frans Blom"'

1. Temperature dependence of the amplitude of the Shubnikov-de Haas oscillations in a two-dimensional electron gas

Author

J. T. Devreese, F Geerinckx, Xiaoguang Wu, François M. Peeters, Fap Frans Blom, P. F. Fontein, and JH Joachim Wolter

Subjects
Condensed matter physics, Chemistry, Cyclotron, Heterojunction, Surfaces and Interfaces, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Surfaces, Coatings and Films, law.invention, Magnetic field, Effective mass (solid-state physics), Amplitude, law, Materials Chemistry, Condensed Matter::Strongly Correlated Electrons, Fermi gas, Scaling, Dimensionless quantity
Abstract

Shubnikov-de Haas measurements have been performed on a high-mobility AlxGa1−xAs/GaAs heterostructure as a function of temperature (1.7⩽T⩽4.2 K) and magnetic field strength (0.25 ⩽B⩽0.70T). The temperature dependence of the amplitude of the Shubnikov-de Haas oscillations is used to define an effective mass of the two-dimensional electron gas. This apparent mass depends strongly on temperature and magnetic field and decreases to values much smaller than that for the cyclotron mass. The apparent mass shows a scaling behavior as a function of the dimensionless quantity k B T h ω c .

Published
1990

2. Inversion asymmetry spin level splitting in zero-gap semimagnetic semiconductors

Author

JH Joachim Wolter, Fap Frans Blom, Hma Ric Schleijpen, and Photonics and Semiconductor Nanophysics

Subjects
Hamiltonian matrix, Condensed matter physics, Chemistry, business.industry, media_common.quotation_subject, Exchange interaction, General Chemistry, Condensed Matter Physics, Asymmetry, Shubnikov–de Haas effect, Amplitude, Semiconductor, Materials Chemistry, Energy level, Electronic band structure, business, media_common
Abstract

We present a new model to interpret recent measurements on Hg1-xMnxSe which show an angular dependence of the nodes in the Shubnikov-de Haas amplitude. The model is based on an infinite Hamiltonian matrix including inversion asymmetry terms. We additionally took into account the exchange interaction, typical for Semimagnetic Semiconductors. By truncating the matrix we can calculate the electron energy levels, allowing us to describe the experimentally observed nodal field positions.

Published
1987

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