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Coulomb drag as a probe of the nature of compressible states in a magnetic field

MPS-Authors
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Muraki,  K.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Lok,  J. G. S.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Kraus,  S.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Dietsche,  W.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;

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von Klitzing,  K.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Muraki, K., Lok, J. G. S., Kraus, S., Dietsche, W., von Klitzing, K., Schuh, D., et al. (2004). Coulomb drag as a probe of the nature of compressible states in a magnetic field. Physical Review Letters, 92(24): 246801.


Cite as: https://hdl.handle.net/21.11116/0000-000E-FEF4-1
Abstract
Magnetodrag reveals the nature of compressible states and the
underlying interplay of disorder and interactions. At nu=3/2 clear
T-4/3 dependence is observed, which signifies the metallic nature of
the N=0 Landau level. In contrast, drag in higher Landau levels reveals
an additional contribution, which anomalously grows with decreasing T
before turning to zero following a thermal activation law. The
anomalous drag is discussed in terms of electron-hole asymmetry arising
from disorder and localization, and the crossover to normal drag at
high fields as due to screening of disorder.