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Interplay between disorder and interactions in two dimensions

✍ Scribed by S. Anissimova; S.V. Kravchenko

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
439 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

The interplay between Coulomb interactions and randomness has been a long-standing problem in condensed matter physics. Recent thermodynamic and transport experiments have shown that in clean two-dimensional electron systems, strong interactions between carriers lead to Pauli spin susceptibility growing critically at low electron densities. In the immediate vicinity of the metal-insulator transition (MIT), both the resistance and the effective interactions become temperature dependent and exhibit a fan-like spread as the MIT is crossed. A resistance-interaction flow diagram clearly reveals a quantum critical point.

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