Hatano T, Stopa M, Yamaguchi T, Ota T, Yamada K, Tarucha S
Tarucha Mesoscopic Correlation Project, ERATO, JST, Atsugi-shi, Kanagawa 243-0198, Japan.
Phys Rev Lett. 2004 Aug 6;93(6):066806. doi: 10.1103/PhysRevLett.93.066806.
We employ a new laterally coupled, vertical double dot with a tunable tunnel-coupling gate in a parallel configuration to study the electron spin and orbital dependence of quantum mechanical tunnel coupling on the size of the honeycomb vertices in the small electron numbers regime. We find a transition from the weak coupling regime, where fluctuations in tunnel coupling due to varying electron configuration dominate the anticrossings, to a regime where the two dots coalesce. We apply a magnetic field to ascertain the orbital angular momenta of the Fermi surface eigenstates, which correlate with anticrossing size, and we identify spin pairs with congruent behavior.
我们采用一种新型的横向耦合垂直双量子点，其具有一个可调谐隧道耦合栅极，处于平行配置，用于研究小电子数 regime 中量子力学隧道耦合对蜂窝顶点尺寸的电子自旋和轨道依赖性。我们发现从弱耦合 regime 发生转变，在该 regime 中，由于电子构型变化导致的隧道耦合波动主导反交叉，转变到两个量子点合并的 regime。我们施加磁场以确定费米面本征态的轨道角动量，其与反交叉尺寸相关，并且我们识别具有一致行为的自旋对。
