Effects of a scattering center on the ground-state energy of quantum-dot lithium
MODERN PHYSICS LETTERS B, cilt.31, sa.7, 2017 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 31 Sayı: 7
- Basım Tarihi: 2017
- Doi Numarası: 10.1142/s0217984917500713
- Dergi Adı: MODERN PHYSICS LETTERS B
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: Quantum dot, scattering center, CI method
- Dokuz Eylül Üniversitesi Adresli: Evet
Özet
In this paper, the effects of a repulsive scattering center on the ground-state energy and spin properties of a three-electron parabolic quantum dot are investigated theoretically by means of configuration interaction method. Phase transition from a weakly correlated regime to a strongly correlated regime is examined from several strengths and positions of Gaussian impurity. Numerical results reveal that the transition from spin-1/2 to spin-3/2 state depends strongly on the location of the impurity which accordingly states the controllability of the spin polarization. Moreover, broken circular symmetry results in more pronounced electronic charge localization.