Yau Jeng-Bang, De Poortere E P, Shayegan M
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Phys Rev Lett. 2002 Apr 8;88(14):146801. doi: 10.1103/PhysRevLett.88.146801. Epub 2002 Mar 20.
We report a study of the Aharonov-Bohm effect, the oscillations of the resistance of a mesoscopic ring as a function of a perpendicular magnetic field, in a GaAs two-dimensional hole system with a strong spin-orbit interaction. The Fourier spectra of the oscillations reveal extra structure near the main peak whose frequency corresponds to the magnetic flux enclosed by the ring. A comparison of the experimental data with results of simulations demonstrates that the origin of the extra structure is the geometric (Berry) phase acquired by the carrier spin as it travels around the ring.
我们报告了一项关于阿哈罗诺夫 - 玻姆效应的研究，即在具有强自旋 - 轨道相互作用的砷化镓二维空穴系统中，介观环的电阻随垂直磁场的振荡情况。振荡的傅里叶光谱显示，在主峰附近存在额外结构，其频率对应于环所包围的磁通量。将实验数据与模拟结果进行比较表明，这种额外结构的起源是载流子自旋在环绕环传播时所获得的几何（贝里）相位。
