Hirose Kenji, Meir Yigal, Wingreen Ned S
Fundamental Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan.
Phys Rev Lett. 2003 Jan 17;90(2):026804. doi: 10.1103/PhysRevLett.90.026804.
Spin-density-functional theory of quantum point contacts (QPCs) reveals the formation of a local moment with a net of one electron spin in the vicinity of the point contact-supporting the recent report of a Kondo effect in a QPC. The hybridization of the local moment to the leads decreases as the QPC becomes longer, while the on site Coulomb-interaction energy remains almost constant.
量子点接触（QPC）的自旋密度泛函理论揭示了在点接触附近形成了具有一个净电子自旋的局域磁矩，这支持了最近关于QPC中近藤效应的报道。随着QPC变长，局域磁矩与引线的杂化作用减弱，而在位库仑相互作用能几乎保持不变。
