NDLI: Gate Controlled Separation of Edge and Bulk Current Transport in the Quantum Hall Effect Regime

Content Provider	Springer Nature Link
Author	Oswald, J. Uiberacker, C.
Copyright Year	2010
Abstract	On the basis of a non-equilibrium network model for magneto transport we propose an approach for creating a quite narrow incompressible stripe far from the sample edges without creating edge channels (EC) at it’s boundaries. This is achieved by an appropriate biasing of a narrow stripe like gate electrode, which is aligned to the longitudinal direction of the sample and covers only a vanishing small part (few percent) of the bulk region. By adjusting the magnetic field in order to tune the bulk region to the vicinity of a plateau transition, the bulk gets resistive (dissipative). In this way we create 3 distinguishable possibilities for current flow: (i) the original ECs at the real edge of the sample; (ii) the dissipative bulk region which covers nearly all of the sample area and (iii) the narrow incompressible stripe in the middle of the bulk region. Our calculations clearly demonstrate, that in this regime all the sample current appears as a dissipation-less current in the narrow incompressible stripe, while the edge channels as well as the bulk region loose their importance.
Starting Page	180
Ending Page	183
Page Count	4
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	159
Issue Number	1-2
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2010-01-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetism, Magnetic Materials Characterization and Evaluation of Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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