Signatures of spin pairing in chaotic quantum dots.
Signatures of spin pairing in chaotic quantum dots.
复制标题
混沌量子点中自旋配对的特征。
DOI：
10.1103/physrevlett.86.2118
复制
发表时间：
2001
影响因子：
8.6
通讯作者：
M. Bichler
中科院分区：
文献类型：
--
作者：
S. Lüscher;Thomas Heinzel;K. Ensslin;Werner Wegscheider;M. Bichler
库仑封锁共振是在 GaAs 量子点中测量的，其中形状变形和相互作用都很小。库仑封锁峰的参数演化在位置和振幅上显示出明显的配对相关性，这被解释为自旋配对。因此，峰间距的最近邻分布可以通过修改的双峰维格纳推测来很好地近似，其中除了恒定相互作用模型之外还考虑了相互作用。
Coulomb blockade resonances are measured in a GaAs quantum dot in which both shape deformations and interactions are small. The parametric evolution of the Coulomb blockade peaks shows a pronounced pair correlation in both position and amplitude, which is interpreted as spin pairing. As a consequence, the nearest-neighbor distribution of peak spacings can be well approximated by a modified bimodal Wigner surmise, in which interactions are taken into account beyond the constant interaction model.