Krüger, F;
Scheidl, S;
(2006)
Frustrated Heisenberg antiferromagnets: Fluctuation-induced first order vs. deconfined quantum criticality.
Europhysics Letters
, 74
(5)
pp. 896-902.
10.1209/epl/i2006-10039-3.
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Abstract
Recently it was argued that quantum phase transitions can be radically different from classical phase transitions with, as a highlight, the "deconfined critical points" exhibiting fractionalization of quantum numbers due to Berry phase effects. Such transitions are supposed to occur in frustrated ("J1-J2") quantum magnets. We have developed a novel renormalization approach for such systems which is fully respecting the underlying lattice structure. According to our findings, another profound phenomenon is around the corner: a fluctuation-induced (order-out-of-disorder) first-order transition. This has to occur for large spin and we conjecture that it is responsible for the weakly first-order behavior recently observed in numerical simulations for frustrated S = 1/2 systems.
| Type: | Article |
|---|---|
| Title: | Frustrated Heisenberg antiferromagnets: Fluctuation-induced first order vs. deconfined quantum criticality |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1209/epl/i2006-10039-3 |
| Publisher version: | http://dx.doi.org/10.1209/epl/i2006-10039-3 |
| Language: | English |
| Additional information: | Copyright © EDP Sciences 2006. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1450189 |
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