Size and shape dependence of electronic states in silicon quantum dots

Yoko Hada, Mikio Eto

研究成果: Conference article査読


We theoretically examine electronic states in Si quantum dots fabricated by an oxidation technique, considering a multivalley structure of conduction band. In spherical dots smaller than about 10 nm, oneelectron energy levels in equivalent valleys are filled consecutively with increasing the number of electrons N. Owing to the absence of intervalley spin-coupling, high-spin states are realized more often in small magnetic fields, than in GaAs quantum dots. In much larger dots, electrons are accommodated in a valley, making the highest spin of Stot = N/2, to gain the exchange energy. In elliptical quantum dots, electrons tend to be populated in the elongated direction and make high-spin states.

ジャーナルPhysica Status Solidi C: Conferences
出版ステータスPublished - 2003 12 1
イベント2nd International Conference on Semiconductor Quantum Dots, QD 2002 - Tokyo, Japan
継続期間: 2002 9 302002 10 3

ASJC Scopus subject areas

  • 凝縮系物理学


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