Superfluid-insulator transition of the two-dimensional fully-frustrated quantum rotor model in the spherical limit
- Authors
- An, Taeyang; Cha, Min-Chul
- Issue Date
- Mar-2015
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Quantum phase transition; Critical exponent; Scaling
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.66, no.6, pp.882 - 886
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 66
- Number
- 6
- Start Page
- 882
- End Page
- 886
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/18823
- DOI
- 10.3938/jkps.66.882
- ISSN
- 0374-4884
- Abstract
- We study the critical properties of the superfluid-insulator transition in the fully-frustrated quantum rotor model at commensurate filling in two dimensions. By developing a large-N method that is applicable to the model with frustration, we find the finite-size scaling properties in the spherical limit, from which the correlation length critical exponent ? = 1.0 and the dynamical critical exponent z = 1 are confirmed. A universal sheet resistance of R (c) /R (0) = 1.25(1) at the critical point, where R (0) is the quantum resistance, is obtained, which is consistent with the theoretical prediction.
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