Phase Transition to Insulating State from Quantum Hall State by Current-Induced Nuclear Spin Polarization

We investigate the resistance enhancement state (RES) where the magnetoresistance of the \(\nu = 2/3\) fractional quantum Hall state (FQHS) is increased with dynamic nuclear spin polarization (DNP) induced by a large electric current. After inducing DNP, we measure the temperature dependence of the...

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Bibliographic Details
Published in:arXiv.org 2013-10
Main Authors: Tsuda, Shibun, Minh-Hai Nguyen, Terasawa, Daiju, Fukuda, Akira, Sawada, Anju
Format: Article
Language:English
Subjects:
Anderson localization
Electrons
Magnetoresistance
Magnetoresistivity
Nuclear spin
Phase transitions
Polarization (spin alignment)
Spin dynamics
Temperature dependence
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Summary:We investigate the resistance enhancement state (RES) where the magnetoresistance of the \(\nu = 2/3\) fractional quantum Hall state (FQHS) is increased with dynamic nuclear spin polarization (DNP) induced by a large electric current. After inducing DNP, we measure the temperature dependence of the magnetoresistance by a small current over a short period of time. We find that the FQHS makes a phase transition to an insulating state. By measuring the Hall resistance in the insulating state, we find that the RES exhibits a quantized Hall resistance. We discuss the RES in association with the Anderson localization.
ISSN:2331-8422