| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
29 March 2024 |
|
| | | |
|
Article overview
| |
|
Effective field theory with a $ heta$-vacua structure for 2d spin systems | Akihiro Tanaka
; Xiao Hu
; | Date: |
13 Jun 2006 | Subject: | Strongly Correlated Electrons | Abstract: | We construct a nonlinear sigma (NL$sigma$) model description of 2+1d spin systems, by coupling together antiferromagnetic spin chains via interchain exchange terms. Our mapping incorporates methods developed recently by ourselves and by Senthil and Fisher, which aim at describing competition between antiferromagnetic and valence-bond-solid orders in quantum magnets. The resulting 2+1d $O$(4) NL$sigma$ model contains a topological $ heta$-term whose vacuum angle $ heta$ varies continuously with $delta$, the bond-alternation strength of the interchain interaction. This implies that the $ heta$-vacua structure for this NL$sigma$ model can be explored by tuning $delta$ in a suitable 2d spin system, which is strongly reminiscent of the situation for 1+1 AF spin chains with bond-alternation. | Source: | arXiv, cond-mat/0606314 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |