Two-leg spin ladder: A low-energy effective field theory approach
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Univ. de Cergy-Pontoise, Cedex (France)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
We present a field theory analysis of a model of two SU(2n)-invariant magnetic chains coupled by a generic interaction preserving time reversal and inversion symmetry. Contrary to the SU(2)-invariant case the zero-temperature phase diagram of such two-leg spin ladder does not contain topological phases. Only generalized Valence Bond Solid phases are stabilized when n > 1 with different wave vectors and ground-state degeneracies. In particular, we find a phase which is made of a cluster of 2n spins put in an SU(2n) singlet state. For n = 3, this cluster phase is relevant to 173Yb ultracold atoms, with an emergent SU(6) symmetry, loaded in double-well optical lattice
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC00112704; AC02-98 CH 10886
- OSTI ID:
- 1193226
- Alternate ID(s):
- OSTI ID: 1179713; OSTI ID: 1226031
- Report Number(s):
- BNL-108111-2015-JA; BNL-108249-2015-JA; PRBMDO; R&D Project: PO015; KC0202030
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 17; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 8 works
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Web of Science
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