Asymmetry of the Hall Conductance Fluctuations in a Random Magnetic Field PDF Download
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Author: Yu V. Nastaushev
Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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Book Description
Transport in a two dimensional electron gas (2 DEG) experiencing a random magnetic field has lately attracted intensive attention, due in large part to its relevance to the properties of the half-filled Landau level. One of the interesting features of the system is the absence of any time-reversal symmetry which would, for example, preclude weak localization. The delocalization problem in a rendom magnetic field system has been studied. In this paper we report on measured fluctuations of the asymmetne part of the Hall conductance in small samples (2 x 2 micron x micron) with a dimpled 2 DEG.
Author: Yu V. Nastaushev
Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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Book Description
Transport in a two dimensional electron gas (2 DEG) experiencing a random magnetic field has lately attracted intensive attention, due in large part to its relevance to the properties of the half-filled Landau level. One of the interesting features of the system is the absence of any time-reversal symmetry which would, for example, preclude weak localization. The delocalization problem in a rendom magnetic field system has been studied. In this paper we report on measured fluctuations of the asymmetne part of the Hall conductance in small samples (2 x 2 micron x micron) with a dimpled 2 DEG.
Author: Jeeva Anandan
Publisher: World Scientific
ISBN: 9814522104
Category :
Languages : en
Pages : 405
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Book Description
The foundations of quantum mechanics has acquired tremendous importance in recent years for three reasons: First, a large number of experiments have tested concepts which previously were purely theoretical. Second, ideas from the foundations of quantum mechanics are being applied now to many fields such as condensed matter physics, quantum statistics, quantum cosmology and quantum gravity. Third, difficulties in constructing a quantum cosmology and theory of gravity have made many theorists examine the foundations of quantum theory to see if quantum mechanics itself needs to be modified. Very distinguished physicists from around the world gave talks on their recent research on a variety of theoretical and experimental aspects on these subjects at this conference.
Author: European Physical Society. Condensed Matter Division. General Conference
Publisher:
ISBN:
Category : Condensed matter
Languages : en
Pages : 648
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Author:
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ISBN:
Category : Physics
Languages : en
Pages : 916
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Author:
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ISBN:
Category : Computers
Languages : en
Pages : 880
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Category : American physics teacher
Languages : en
Pages : 598
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Author: European Physical Society. Condensed Matter Division. General Meeting
Publisher:
ISBN:
Category : Condensed matter
Languages : en
Pages : 340
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Author: European Physical Society. Condensed Matter Division. General Conference
Publisher:
ISBN:
Category : Condensed matter
Languages : en
Pages : 342
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Author: European Physical Society. Condensed Matter Division. General Conference
Publisher:
ISBN:
Category : Condensed matter
Languages : en
Pages : 354
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Author: Tapash Chakraborty
Publisher: Springer Science & Business Media
ISBN: 3642971016
Category : Science
Languages : en
Pages : 186
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Book Description
The experimental discovery of the fractional quantum Hall effect (FQHE) at the end of 1981 by Tsui, Stormer and Gossard was absolutely unexpected since, at this time, no theoretical work existed that could predict new struc tures in the magnetotransport coefficients under conditions representing the extreme quantum limit. It is more than thirty years since investigations of bulk semiconductors in very strong magnetic fields were begun. Under these conditions, only the lowest Landau level is occupied and the theory predicted a monotonic variation of the resistivity with increasing magnetic field, depending sensitively on the scattering mechanism. However, the ex perimental data could not be analyzed accurately since magnetic freeze-out effects and the transitions from a degenerate to a nondegenerate system complicated the interpretation of the data. For a two-dimensional electron gas, where the positive background charge is well separated from the two dimensional system, magnetic freeze-out effects are barely visible and an analysis of the data in the extreme quantum limit seems to be easier. First measurements in this magnetic field region on silicon field-effect transistors were not successful because the disorder in these devices was so large that all electrons in the lowest Landau level were localized. Consequently, models of a spin glass and finally of a Wigner solid were developed and much effort was put into developing the technology for improving the quality of semi conductor materials and devices, especially in the field of two-dimensional electron systems.
