Effect of external electric field on the charge density waves in one-dimensional Hubbard superlattices

被引:3
|
作者
Chowdhury, Jayeeta [1 ]
Karmakar, S. N. [2 ]
Bhattacharyya, Bibhas [3 ]
机构
[1] E Calcutta Girls Coll, Dept Phys, Kolkata 700089, India
[2] Saha Inst Nucl Phys, TCMP Div, Kolkata 700064, W Bengal, India
[3] Jadavpur Univ, Dept Phys, Kolkata 700032, India
关键词
TRANSITION; MAGNETORESISTANCE; STATES; MODEL;
D O I
10.1088/0953-8984/21/1/015302
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We have studied the ground state of one-dimensional Hubbard superlattice structures with different unit-cell sizes in the presence of an electric field. A self-consistent Hartree-Fock approximation calculation is done in the weak- to intermediate-interaction regime. Studying the charge gap at the Fermi level and the charge density structure factor, we get an idea of how the charge modulation on the superlattice is governed by the competition between the electronic correlation and the external electric field.
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页数:6
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