  Several relativistic quantum gravitational effects such as spin-rotation
coupling, gravitomagnetic charge and gravitational Meissner effect are
investigated in the present letter. The field equation of gravitomagnetic
matter is suggested and a static spherically symmetric solution of this
equation is offered. With foreseeable improvements in detecting and measuring
technology, it is possible for us to investigate quantum mechanics in
weak-gravitational fields. The potential implications of these gravitational
effects (or phenomena) to some problems are briefly discussed.
