First order transition in two dimensional coulomb glass

7th International Conference on Applied Physics and Mathematics

物理学;数学

Bhandari, Preeti^1 ; Malik, Vikas^2

Department of Physics, Jamia Millia Islamia, New Delhi

110025, India^1

Department of Physics and Material Science, Jaypee Institute of Information Technology, Uttar Pradesh

201304, India^2

关键词: Charge-ordered phase;    Correlation lengths;    Critical exponent;    Disorder strength;    Disordered phase;    Finite size scaling;    First order transitions;    Two-dimensional lattice model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/814/1/012005/pdf
DOI  :  10.1088/1742-6596/814/1/012005

来源: IOP

【 摘 要 】

We have studied the ground states of two dimensional lattice model of Coulomb Glass via Monte Carlo annealing. Our results show a possibility of existence of a critical disorder (Wc) below which the system is in the charge ordered phase and above it the system is in the disordered phase. We have used finite size scaling to calculate Wc= 0.2413, the critical exponent of magnetization β = 0 indicating discontinuity in magnetization and the critical exponent of correlation length ν = 1.0. The distribution of staggered magnetization for different disorder strengths shows a three peak structure. We thus predict that two dimensional Coulomb Glass shows a first order transition at T=0.