Formation of -space indirect magnetoexcitons in double-quantum-well direct-gap heterostructures

The spectrum of excitons in a double-quantum-well structure is calculated in a tilted magnetic field. It is shown that the spectrum becomes asymmetric in quasimomentum if the component of the magnetic field that is transverse with respect to the growth direction is nonzero. A transition from a -space direct exciton ground state to a -space indirect one accompanied by sharp quenching of photoluminescence is described.