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Insulating phases of electrons on a zigzag strip in the orbital magnetic field

Lai, Hsin-Hua and Motrunich, Olexei I. (2010) Insulating phases of electrons on a zigzag strip in the orbital magnetic field. Physical Review B, 82 (19). Art. No. 195119. ISSN 0163-1829. doi:10.1103/PhysRevB.82.195119.

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We consider electrons on a two-leg triangular ladder at half filling and in an orbital magnetic field. In a two-band regime in the absence of the field, the electronic system remains conducting for weak interactions since there is no four-fermion umklapp term. We find that in the presence of the orbital field there is a four-fermion umklapp and it is always relevant for repulsive interactions. Thus in this special ladder, the combination of the orbital magnetic field and interactions provides a mechanism to drive metal-insulator transition already at weak coupling. We discuss properties of the possible resulting phases C0S2 and various C0S1 and C0S0.

Item Type:Article
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URLURL TypeDescription DOIArticle
Motrunich, Olexei I.0000-0001-8031-0022
Additional Information:© 2010 The American Physical Society. Received 17 August 2010; published 12 November 2010. We would like to thank M. P. A. Fisher for useful discussions. This research is supported by the National Science Foundation through Grant No. DMR-0907145 and by the A. P. Sloan Foundation.
Funding AgencyGrant Number
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:19
Classification Code:PACS: 71.10.Hf, 71.10.Pm
Record Number:CaltechAUTHORS:20101215-090601625
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21372
Deposited By: Tony Diaz
Deposited On:15 Dec 2010 17:56
Last Modified:09 Nov 2021 00:08

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