Anomalous phase shift in a twisted quantum loop

Abstract

Coherent motion of electrons in a twisted quantum ring is considered to explore the effect of torsion inherent to the ring. Internal torsion of the ring composed of helical atomic configuration yields a non-trivial quantum phase shift in the electrons' eigenstates. This torsion-induced phase shift causes novel kinds of persistent current flow and an Aharonov-Bohm like conductance oscillation. The two phenomena can occur even when no magnetic flux penetrates inside the twisted ring, thus being in complete contrast with the counterparts observed in untwisted rings.

13 paes, 5 figures

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Cited by in corpus (4)

• Geometric effects resulting from square and circular confinements for a particle constrained to a space curve
• Induced magnetic moment for a spinless charged particle in the thin-layer approach
• Manipulating the Tomonaga-Luttinger exponent by electric field modulation
• Electronic Properties and Persistent Spin Currents of Nanospring under Static Magnetic Field