VARIATIONAL COMPUTATIONS FOR EXCITONS IN QUANTUM DOTS: A QUANTUM MONTE CARLO STUDY

被引：1

作者：

Yildiz, A. ^{[1
]}

Sakiroglu, S. ^{[1
]}

Dogan, U. ^{[1
]}

Akgungor, K. ^{[1
]}

Epik, H. ^{[1
]}

Sokmen, I. ^{[1
]}

Sari, H. ^{[2
]}

Ergun, Y. ^{[3
]}

机构：

[1] Dokuz Eylul Univ, Dept Phys, TR-35160 Izmir, Turkey

[2] Cumhuriyet Univ, Dept Phys, TR-58140 Sivas, Turkey

[3] Anadolu Univ, Dept Phys, TR-26470 Eskisehir, Turkey

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2011年 / 25卷 / 01期

关键词：

Exciton; parabolic confinement; variational Monte Carlo method; Monte Carlo diagonalization method; WAVE-FUNCTION; INTERACTING ELECTRONS; GROUND-STATE; SIMULATION; ENERGY; FIELD;

D O I：

10.1142/S0217979211055683

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A study of variational wave functions for calculation of the ground-state energies of excitons confined in a two-dimensional (2D) disc-like and three-dimensional (3D) spherical parabolic GaAs quantum dots (QDs) is presented. We have used four variational trial wave functions constructed as the harmonic-oscillator basis multiplied by different correlation functions. The proposed correlation function formed by including linear expansion in terms of Hylleraas-like coordinates to the Jastrow factor is able to capture nearly exactly the ground-state energies of 31) excitons, and it properly account for the results of 2D excitons. Quantum Monte Carlo techniques combined with the proposed wave function are a powerful tool for studying excitons in parabolic QDs.

引用

页码：119 / 130

页数：12

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