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Exact ground states of extended t-J(z) models on a square lattice
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.ORCID iD: 0000-0002-2076-5911
2007 (English)In: Philosophical Magazine Letters, ISSN 0950-0839, E-ISSN 1362-3036, Vol. 87, no 7, 515-526 p.Article in journal (Refereed) Published
Abstract [en]

We examine special extended spin S = 1/2 fermionic and hard core bosonic t - J(z) models with nearest neighbour and next nearest neighbour interactions to find exact ground states. Some of these models display an exponentially large degeneracy with diagonal stripe-like patterns.

Place, publisher, year, edition, pages
2007. Vol. 87, no 7, 515-526 p.
Keyword [en]
antiferromagnets, statistics, magnetism, dimers, phase, ice
URN: urn:nbn:se:kth:diva-16656DOI: 10.1080/09500830701253169ISI: 000246773500007OAI: diva2:334698
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Rosengren, Anders
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