Disorder and temperature renormalization of interaction contribution to the conductivity in two-dimensional Inx Ga1-x As electron systems

Physical Review B - Condensed Matter and Materials Physics

Volumn 79, Issue 23, 2009, Pages

  Minkov, G M ^a,b   Germanenko, A V ^b   Rut, O E ^b   Sherstobitov, A A ^a,b   Zvonkov, B N ^c  

^a INSTITUTE OF METAL PHYSICS   (Russian Federation)

^b URAL FEDERAL UNIVERSITY   (Russian Federation)

^c LOBACHEVSKY STATE UNIVERSITY OF NIZHNY NOVGOROD   (Russian Federation)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 68949094313     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.235335     Document Type: Article

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27. By and large the structures 4261 and 3510 behave themselves analogously. Exception is that the slope of the σ vs lnT dependence is somewhat different from that predicted theoretically, 1+ Kee. This issue will be discussed elsewhere.
28. We have supposed that the change in the slope of σ vs lnT and σxx vs lnT dependences results from the renormalization of the interaction constant only. It is not straightforward method for the determination of the interaction constant. More direct method is based on the suppression of the triplet channel in the magnetic field due to the Zeeman effect. This method is applied for the systems with relatively large magnitude of g factor. It was used for the 2D hole system (Ref.) where g 1.5-2. However, the holes are the carriers of four-fold degenerated band with the total moment 3/2. Therefore it is not quite correct to compare the experimental data with the predictions of the RG theory developed for 2D electron systems with the simple, single-valley energy spectrum.
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