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Critical properties of the quantum rotor model with phase frustration at incommensurate filling in two dimensions

Title
Critical properties of the quantum rotor model with phase frustration at incommensurate filling in two dimensions
Author
차민철
Keywords
Quantum phase transition; Critical exponent; Scaling; SUPERCONDUCTOR-INSULATOR TRANSITION; JOSEPHSON-JUNCTION ARRAYS; MAGNETIC-FIELD; UNIVERSAL CONDUCTIVITY; SPHERICAL LIMIT
Issue Date
2016-10
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v. 69, No. 7, Page. 1152-1156
Abstract
The critical properties of the zero-temperature superfluid-insulator transition in the fullyfrustrated quantum rotor model at incommensurate filling in two dimensions are studied. We develop a spherical approximation scheme for the model with phase frustration f = 1/2 by choosing a primitive unit cell composed of two sites. The finite-size scaling behavior of various physical quantities in the spherical limit provides the correlation length critical exponent nu = 0.5 and the dynamical critical exponent z = 2, which are consistent with the scenario of the generic superfluidinsulator transition even in the presence of phase frustration.
URI
https://link.springer.com/article/10.3938%2Fjkps.69.1152http://repository.hanyang.ac.kr/handle/20.500.11754/70363
ISSN
0374-4884; 1976-8524
DOI
10.3938/jkps.69.1152
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
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