Author： Xiang S Fuji K Sato S Xiao S Bird J P Aoki N Ochiai Y
Publisher： IOP Publishing
E-ISSN： 1361-648X|27|20|202201-202206
ISSN： 0953-8984
Source： Journal of Physics: Condensed Matter, Vol.27, Iss.20, 2015-05, pp. : 202201-202206
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Abstract
We investigate edge state transmission in quantum point contacts (QPCs) in the fractional quantum-Hall regime, finding behavior reminiscent of a metal–insulator transition. The transition is suggested by an unusual behavior of the differential conductance in the fractional-quantum-Hall regime, and by the presence of a fixed point and universal scaling in the temperature dependence of the linear conductance. Noting that the 0.7 feature evolves continuously into a last fractional plateau at high magnetic fields, we suggest that this still unresolved feature may itself be viewed as a manifestation of a local, microscopic, metal–insulator transition.
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