Artículo
Nonmonotonic quantum phase gathering in curved spintronic circuits
Autor/es | Rodríguez Fernández, Eusebio Jesús
Frustaglia, Diego César |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada II |
Fecha de publicación | 2021-11-24 |
Fecha de depósito | 2022-07-20 |
Publicado en |
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Resumen | 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, ... 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. |
Cita | Rodríguez Fernández, E.J. y Frustaglia, D.C. (2021). Nonmonotonic quantum phase gathering in curved spintronic circuits. Physical Review B, 104 (19(195308)) |
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