Влияние электрон-дырочной асимметрии на электронную структуру спиральных краевых состояний в квантовой яме HgTe/HgCdTe

We study the effects of electron-hole asymmetry on the electronic structure of helical edge statesin HgTe/HgCdTe quantum wells. In the framework of the four-band kp-model, which takes intoaccount the absence of a spacial inversion centre, we obtain analytical expressions for the energyspectrum and wave functions of edge states, as well as the effective g-factor tensor and matrixelements of electro-dipole optical transitions between the spin branches of the edge electrons. Weshow that when two conditions - electron-hole asymmetry and theabsence of an inversion centre - are simultaneously satisfied, the spectrum of edge electrons deviates from the linear one, and we obtain the corresponding corrections.