11B nuclear magnetic resonance study on existence of boron-hydrogen complex in boron-doped diamond

The assignment of boron not contributing to conductivity in boron-doped diamond to boron-hydrogen complex is reexamined using a new B-11 two-dimensional NMR technique, which is developed to detect H-1-B-11 dipolar broadening. It is shown that the amount of boron-hydrogen complex is not substantial and the previous assignment is thus less plausible. Possible mechanisms of linebroadening are discussed.