Titlebook: High Magnetic Fields in Semiconductor Physics II; Transport and Optics Gottfried Landwehr Conference proceedings 1989 Springer-Verlag Berli

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K. Broderix,N. Heldt,H. Leschketo anxiety. The authors explore the idea of reciprocal relations between anxiety and health factors throughout the developmental course. Special attention is devoted to the mechanisms by which certain health factors (e.g. physical exercise) may play a role in the onset or maintenance of particular anxiety disorders..

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Yu. Bychkov,S. Iordanskyto anxiety. The authors explore the idea of reciprocal relations between anxiety and health factors throughout the developmental course. Special attention is devoted to the mechanisms by which certain health factors (e.g. physical exercise) may play a role in the onset or maintenance of particular anxiety disorders..

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Collective Excitations of Two-Dimensional Electron Solids and Correlated Quantum Liquids in High Magto exist rigorously in the long-wavelength limit of low-lying collective excitations in two condensed phases, i.e., an incompressible quantum liquid and a two-dimensional electron quantum solid, respectively.

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Density of States and Coulomb Interactions in the Integer Quantum Hall Effectcture of screening, inhomogeneous electron density and effective density of states at the Fermi level results which emphasizes the importance of Coulomb interactions even in the integer quantum Hall effect.

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Correlation Between Magnetotransport and Photoluminescence in the Quantum Hall Effect Regime observed which are correlated with plateaus of the Quantum Hall Effect. The results are explained by the change in the level structure associated with the occupation of the subbands, on the basis of a single particle self consistent calculation.

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Interaction of Surface Acoustic Waves with Inversion Electrons on GaAs in Quantizing Magnetic Fieldsnd frequency are presented and discussed. It is shown that the interaction is strongest in the Quantum Hall regime and thus can serve as an additional tool to study quantum phenomena in two-dimensional electron systems.

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The Fractional Quantum Hall Effect at Even Denominatorst Landau level .<2 points to important differences between electron correlations in the first and second Landau levels. The purpose of the present paper is to review the existing experimental data[1,3] on the .=5/2 FQHE and show how this startling new result can, in principle at least, be accommodat