Compact quantum electrodynamics in 2+1 dimensions and spinon deconfinement: a renormalization group analysis

Details Compact quantum electrodynamics in 2+1 dimensions and spinon deconfinement: a renormalization group analysis Compact quantum electrodynamics in 2+1 dimensions and spinon deconfinement: a renormalization group analysis

2007-05-24

arxiv.org/abs/0705.3541v2

Phys.Rev.B77:045107,2008

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 1 figure; v2: references added

Scientific paper

10.1103/PhysRevB.77.045107

We discuss compact (2+1)-dimensional Maxwell electrodynamics coupled to fermionic matter with N replica. For large enough N, the latter corresponds to an effective theory for the nearest neighbor SU(N) Heisenberg antiferromagnet, in which the fermions represent solitonic excitations known as spinons. Here we show that the spinons are deconfined for $N>N_c=36$, thus leading to an insulating state known as spin liquid. A previous analysis considerably underestimated the value of $N_c$. We show further that for $20

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