Appendix A: The ER in HDS Under Magnetic Quantization

In this chapter we study the ER in the presence of magnetic quantization in HD nonlinear optical, III-V, II-VI, IV-VI, stressed materials, Te, GaP, PtSb2, Ge, II-V, GaSb, Bi2Te3 and Pb1-xGexTe, respectively on the basis of newly formulated electron dispersion law in each case. This appendix contains 52 open research problems.