Direct observation of the Aharonov-Casher phase

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-Büttiker formalism.

4 pages, 4 figures

References in corpus (6)

• Spin interference effects in ring conductors subject to Rashba coupling
• Spin-dependent (magneto)transport through a ring due to spin-orbit interaction
• Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase
• Giant spin-orbit splitting in a HgTe quantum well
• Modulating Unpolarized Current in Quantum Spintronics: Visibility of Spin-Interference Effects in Multichannel Aharonov-Casher Mesoscopic Rings
• Quasi-ballistic transport in HgTe quantum-well nanostructures

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