Theoretical aspects of superconductivity in boron-doped diamond

The theoretical aspects of the electronic states and superconductivity in boron (B)7 doped diamond are reviewed. Starting from the explanation of the basic notions of the electronic structure of diamond and the impurity states of a doped B atom, we first discuss the electronic states of B-doped diamond by placing particular emphasis on the effects of disorder on the electronic states induced by the B impurities. We then consider the superconductivity of B-doped diamond by calculating the impurity states of B atoms and superconducting critical temperature by the coherent potential approximation. We show that the effects of disorder play a crucial role in the electronic structure and superconducting critical temperature of B-doped diamond.