Tian Yuan, Cheng Weiyou, Peng Yuheng, Zhang Baolin. STUDY ON THE SPIN-SPLITTING OF THE ENERGY BAND FOR SUPERLATTICES WITH QUART-CONSTITUTENT MATERIALS[J]. Chinese Journal of Luminescence, 1997,18(1): 90-93
Tian Yuan, Cheng Weiyou, Peng Yuheng, Zhang Baolin. STUDY ON THE SPIN-SPLITTING OF THE ENERGY BAND FOR SUPERLATTICES WITH QUART-CONSTITUTENT MATERIALS[J]. Chinese Journal of Luminescence, 1997,18(1): 90-93DOI:
The valence band spin-splitting for a superlattice composed of AlAs
Al
y
Ga
1-y
As
Al
x
Ga
1-x
As and GaAs is studied in this paper. It is shown that when the superlattice unit cell is asymmetrcal about the centre of the unit cell
the band corresponding to spin-up and spin-down will spit. The spitting mainly takes place at the stronger interaction. The stronger is the interaction
the larger is the spin-splitting. When y is increased for
x
being fixed 0.05
the spin-splitting does not cause much variation. However
when
x
is increased for y being fixed 0.9
the spin-splitting produces a large rise and fall.