A model for pairing in two-dimensional electron gases

被引：2
作者：
Nagy, I. [2 ,3 ]
Zabala, N. [1 ,4 ]
Echenique, P. M. [3 ,4 ,5 ]
机构：
[1] Univ Basque Country, Zientzia Eta Teknol Fak, Bilbao 48080, Spain
[2] Tech Univ Budapest, Inst Phys, Dept Theoret Phys, H-1521 Budapest, Hungary
[3] Donostia Int Phys Ctr DIPC, San Sebastian 20018, Spain
[4] Ctr Mixto CSIC Univ Basque Country, Unidad Fis Mat, San Sebastian 20018, Spain
[5] Univ Basque Country, Fac Quim, Dept Fis Mat, San Sebastian 20080, Spain
来源：
NEW JOURNAL OF PHYSICS | 2009年 / 11卷
关键词：
FERMI-LIQUID; MATTER; SUPERCONDUCTIVITY; STATE; WAVE;
D O I：
10.1088/1367-2630/11/6/063012
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
If the bare interaction between two electrons is dressed in the two-dimensional (2D) electron gas by the many-body environment, pairing may occur. Here, we study numerically the existence and character of bound states in cases where the basic dressing is described by superimposing normalized holes centered around both electrons. Beyond this modeling, a possible modification of the interaction energy at short range is considered by a repulsive potential term. The effect of the ionic polarizability on pair interaction is approximated by a static dielectric constant. A many-body analysis of pairing, employing the spherical harmonics representation of the Bethe-Salpeter ladder-solution for the two-particle scattering amplitude in 2D, is given as well. Pairing occurs due to attractive spherical harmonics in our interparticle potential.
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页数：12
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