An Indication of Quantum Hall Effect in PbTe-Pb1−xSnxTe Superlattice
1986 年 55 巻 8 号 p. 2519-2522
詳細
1986 年 55 巻 8 号 p. 2519-2522
An indication of the quantum Hall effect has been observed in the superlattice of PbTe-Pb0.78Sn0.22Te on BaF2 (111) substrate. The positions of steps in the Hall resistance are well explained, if the singlet (111) valley in the PbTe quantum well is unoccupied. Compressive strain in PbTe layers caused by the lattice mismatch between PbTe and PbSnTe layers raises the singlet valley higher than the other three valleys.
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