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Article: Quantum Hall effect in double-quantum-well systems

TitleQuantum Hall effect in double-quantum-well systems
Authors
Issue Date1991
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B, 1991, v. 43 n. 11, p. 9339-9342 How to Cite?
AbstractWe investigate the nature of the electron ground state of a double-quantum-well system in a strong perpendicular magnetic field by using finite-size numerical studies on spherical systems. Interwell electron tunneling is explicitly included by taking into account the spreading of the electron wave function in the direction perpendicular to the double quantum well. As a function of interwell separation, the overlap between the exact ground state of a finite-size system and the Jastrow-type variational wave function is calculated for filling factors =1, 2/3, and 1/2. Our results show (a) the destruction of the =1 integral quantum Hall effect due to electron-electron interaction; (b) the switching of the ground state from one quantum Hall state to another due to the competition between interwell tunneling and electron correlation; and (c) the possibility of observing the =1/2 fractional quantum Hall effect in a double-quantum-well system at appropriate well separations. © 1991 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/174635
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHe, Sen_US
dc.contributor.authorXie, XCen_US
dc.contributor.authorDas Sarma, Sen_US
dc.contributor.authorZhang, FCen_US
dc.date.accessioned2012-11-26T08:46:37Z-
dc.date.available2012-11-26T08:46:37Z-
dc.date.issued1991en_US
dc.identifier.citationPhysical Review B, 1991, v. 43 n. 11, p. 9339-9342en_US
dc.identifier.issn0163-1829en_US
dc.identifier.urihttp://hdl.handle.net/10722/174635-
dc.description.abstractWe investigate the nature of the electron ground state of a double-quantum-well system in a strong perpendicular magnetic field by using finite-size numerical studies on spherical systems. Interwell electron tunneling is explicitly included by taking into account the spreading of the electron wave function in the direction perpendicular to the double quantum well. As a function of interwell separation, the overlap between the exact ground state of a finite-size system and the Jastrow-type variational wave function is calculated for filling factors =1, 2/3, and 1/2. Our results show (a) the destruction of the =1 integral quantum Hall effect due to electron-electron interaction; (b) the switching of the ground state from one quantum Hall state to another due to the competition between interwell tunneling and electron correlation; and (c) the possibility of observing the =1/2 fractional quantum Hall effect in a double-quantum-well system at appropriate well separations. © 1991 The American Physical Society.en_US
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_US
dc.relation.ispartofPhysical Review Ben_US
dc.titleQuantum Hall effect in double-quantum-well systemsen_US
dc.typeArticleen_US
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_US
dc.identifier.authorityZhang, FC=rp00840en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1103/PhysRevB.43.9339en_US
dc.identifier.scopuseid_2-s2.0-0001177477en_US
dc.identifier.volume43en_US
dc.identifier.issue11en_US
dc.identifier.spage9339en_US
dc.identifier.epage9342en_US
dc.identifier.isiWOS:A1991FH29100076-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHe, S=7402691364en_US
dc.identifier.scopusauthoridXie, XC=13502915800en_US
dc.identifier.scopusauthoridDas Sarma, S=35459638700en_US
dc.identifier.scopusauthoridZhang, FC=14012468800en_US

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