König M, Tschetschetkin A, Hankiewicz E M, Sinova Jairo, Hock V, Daumer V, Schäfer M, Becker C R, Buhmann H, Molenkamp L W
Physikalisches Institut (EP 3), Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
Phys Rev Lett. 2006 Feb 24;96(7):076804. doi: 10.1103/PhysRevLett.96.076804.
Ring structures fabricated from HgTe/HgCdTe quantum wells have been used to study Aharonov-Bohm type conductance oscillations as a function of Rashba spin-orbit splitting strength. We observe nonmonotonic phase changes indicating that an additional phase factor modifies the electron wave function. We associate these observations with the Aharonov-Casher effect. This is confirmed by comparison with numerical calculations of the magnetoconductance for a multichannel ring structure within the Landauer-Büttiker formalism.
由HgTe/HgCdTe量子阱制成的环形结构已被用于研究作为Rashba自旋轨道分裂强度函数的阿哈罗诺夫 - 玻姆型电导振荡。我们观察到非单调的相位变化，这表明一个额外的相位因子会修改电子波函数。我们将这些观察结果与阿哈罗诺夫 - 卡什效应联系起来。通过与Landauer - Büttiker形式体系内多通道环形结构的磁电导数值计算进行比较，这一点得到了证实。
