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Logarithmic temperature dependence of the conductivity of the two-dimensional metal (1998)

Pudalov, V. M. ; Brunthaler, G. ; Prinz, A. ; [et al.]

Springer

JETP letters 68 (1998), S. 534-538

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ISSN: 1090-6487

Keywords: 73.61.At ; 73.40.Qv ; 73.50.Dn

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We report on the first observation and studies of a weak delocalizing logarithmic temperature dependence of the conductivity, which causes the conductivity of the 2D metal to increase as T decreases down to 16 mK. The prefactor of the logarithmic dependence is found to decrease gradually with density, to vanish at a critical density n c , 2∼2×1012 cm−2, and then to have the opposite sign at n〉n c ,2. The second critical density sets the upper limit on the existence region of the 2D metal, whereas the conductivity at the critical point, G c ,2∼120e 2/h, sets an upper (low-temperature) limit on its conductivity.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1134/1.567902

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