Published July 20, 2022
| Version v1
Publication
Nonmonotonic quantum phase gathering in curved spintronic circuits
Description
Spin carriers propagating along quantum circuits gather quantum spin phases depending on the circuit's
size, shape, and spin-orbit coupling (SOC) strength. These phases typically grow monotonically with the SOC
strength, as found in Rashba quantum wires and rings. In this work we show that the spin-phase gathering can
be engineered by geometric means, viz., by the geometric curvature of the circuits, to be nonmonotonic. We
demonstrate this peculiar property by using one-dimensional polygonal models where flat segments alternate
with highly curved vertices. The complex interplay between dynamic and geometric spin-phase components—
triggered by a series of emergent spin degeneracy points—leads to bounded, global spin phases. Moreover, we
show that the particulars of the spin-phase gathering have observable consequences in the Aharonov-Casher
conductance of Rashba loops, a connection that passed unnoticed in previous works.
Additional details
Identifiers
- URL
- https://idus.us.es/handle//11441/135648
- URN
- urn:oai:idus.us.es:11441/135648