Flux expulsion and greedy bosons: frustrated magnets at large N
| dc.creator | Tchernyshyov, O. | |
| dc.creator | Moessner, R. | |
| dc.creator | Sondhi, S. L. | |
| dc.date | 2004-08-24 | |
| dc.date.accessioned | 2026-07-07T06:24:34Z | |
| dc.date.available | 2026-07-07T06:24:34Z | |
| dc.description | We investigate the Sp(N) mean-field theory for frustrated quantum magnets. First, we establish some general properties of its solutions; in particular, for small spin we propose simple rules for determining the saddle points of optimal energy. We then apply these insights to the pyrochlore lattice. For spins on a single tetrahedron, we demonstrate a continuous ground state degeneracy for any value of the spin length. For the full pyrochlore lattice, this degeneracy translates to a large number of near-degenerate potential saddle points. Remarkably, it is impossible to construct a saddle point with the full symmetry of the Hamiltonian--at large N, the pyrochlore magnet CANNOT be a spin liquid. Nonetheless, for realistic finite values of N, tunnelling between the nearly degenerate saddle points could restore the full symmetry of the Hamiltonian. | |
| dc.description | 4 pages, 2 eps figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0408498 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0408498 | |
| dc.identifier | Europhys. Lett. 73, 278 (2006) | |
| dc.identifier | doi:10.1209/epl/i2005-10389-2 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96587 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Flux expulsion and greedy bosons: frustrated magnets at large N | |
| dc.type | text |