34 2

Finite-temperature phase transitions in a two-dimensional boson Hubbard model

Title
Finite-temperature phase transitions in a two-dimensional boson Hubbard model
Author
차민철
Keywords
XY-MODEL; INSULATOR TRANSITION; QUANTUM; CRITICALITY; SYSTEMS
Issue Date
2007-06
Publisher
AMERICAN PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 98, No. 26, Article no. 266406
Abstract
We study finite-temperature phase transitions in a two-dimensional boson Hubbard model with zero-point quantum fluctuations via Monte Carlo simulations of a quantum rotor model and construct the corresponding phase diagram. Compressibility shows a thermally activated gapped behavior in the insulating regime. Finite-size scaling of the superfluid stiffness clearly shows the nature of the Kosterlitz-Thouless transition. The transition temperature T-c confirms a scaling relation T-c proportional to rho(x)(0), with x=1.0. Some evidence of anomalous quantum behavior at low temperatures is presented.
URI
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.266406http://repository.hanyang.ac.kr/handle/20.500.11754/106575
ISSN
0031-9007
DOI
10.1103/PhysRevLett.98.266406
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
Files in This Item:
2007.06_차민철_Finite-temperature phase transitions in a two-dimensional boson Hubbard model.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE