期刊論文

標題 Kinetic energy driven superconductivity in the electron doped cobaltate NaxCoO2 · yH2O
學年 93
學期 2
出版(發表)日期 2005/06/15
作品名稱 Kinetic energy driven superconductivity in the electron doped cobaltate NaxCoO2 · yH2O
作品名稱(其他語言)
著者 Liu, Bin; Liang, Ying; Feng, Shi-ping; 陳惟堯; Chen, Wei-yeu
單位 淡江大學物理學系
出版者 Chinese Physical Society/Institute of Theoretical Physics.
著錄名稱、卷期、頁數 Communications in Theoretical Physics 43(6), pp.1127-1132
摘要 Within the charge-spin separation fermion-spin theory, we show that the mechanism of superconductivity in the electron doped cobaltate NaxCoO2centerdotyH2O is ascribed to its kinetic energy. The dressed fermions interact occurring directly through the kinetic energy by exchanging magnetic excitations. This interaction leads to a net attractive force between dressed fermions, then the electron Cooper pairs originating from the dressed fermion pairing state are due to the charge-spin recombination, and their condensation reveals the superconducting ground state. The superconducting transition temperature is identical to the dressed fermion pair transition temperature, and is suppressed to a lower temperature due to the strong magnetic frustration. The optimal superconducting transition temperature occurs in the electron doping concentration δ≈0.29, and then decreases for both underdoped and overdoped regimes, in qualitative agreement with the experimental results.
關鍵字
語言 英文
ISSN 0253-6102
期刊性質 國外
收錄於
產學合作
通訊作者
審稿制度
國別 英國
公開徵稿
出版型式 ,紙本