Rodríguez Fernández, Eusebio JesúsFrustaglia, Diego César2022-07-202022-07-202021-11-24Rodríguez Fernández, E.J. y Frustaglia, D.C. (2021). Nonmonotonic quantum phase gathering in curved spintronic circuits. Physical Review B, 104 (19(195308))2469-99502469-9969https://hdl.handle.net/11441/135648Spin 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.application/pdf10 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Quantum phaseCurved spintronic circuitsinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1103/PhysRevB.104.195308