Patent ID: 6080995
Filing Date: 2000-06-27
Classification: H01L

Abstract:
A quantum device comprising:a conduction layer which has a Fermi level E.sub.F.sup.2DEG and through which a current flows;a coupled quantum well layer which includes a plurality of quantum well layers and is adjacent to the conduction layer;one of said plurality of quantum well layers of said coupled quantum well layer being closer to said conduction layer having a localized minimum energy level of electrons E.sub.0.sup.QW1 in a thermal equilibrium state;another of said plurality of quantum well layers of said coupled quantum well layer being opposite said conduction layer and having a localized minimum energy level of electrons E.sub.0.sup.QW2 in a thermal equilibrium state; anda gate electrode placed adjacent to said coupled quantum layer opposite said conduction layer;wherein,E.sub.0.sup.QW1 >E.sub.0.sup.QW2 +k.sub.B T, where k.sub.B is Boltzmann constant and T is an absolute temperature of said device.