Characteristics of superconducting and semiconductor materials with the same composition have been studied at room temperature,94K,and 77K by the positron annihilation technique.The results indicate that the phase tra...Characteristics of superconducting and semiconductor materials with the same composition have been studied at room temperature,94K,and 77K by the positron annihilation technique.The results indicate that the phase transition of electronic strueture in the superconducting material takes place in the superconducting state.展开更多
文摘Characteristics of superconducting and semiconductor materials with the same composition have been studied at room temperature,94K,and 77K by the positron annihilation technique.The results indicate that the phase transition of electronic strueture in the superconducting material takes place in the superconducting state.
