| Direct observation of the Aharonov-Casher phase (2005) | |||||||||
Abstract | |||||||||
| 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 non-monotonic 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 magneto-conductance for a multichannel ring structure within the Landauer-B\"uttiker formalism.. Comment: 4 pages, 4 figures | |||||||||
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