Spin resonance under topological driving fields

Reynoso, Andrés A.; Baltanás, J. P.; Saarikoski, Henri; Vázquez‐Lozano, J. Enrique; Nitta, Junsaku; Frustaglia, Diego

doi:10.1088/1367-2630/aa723a

Cited by 14 publications

(36 citation statements)

References 31 publications

(69 reference statements)

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“…It has been suggested that this effective phase of geometrical origin could be studied by either interferometric means in ring systems or analyzing resonances in spin or other two-level quantum systems. [33][34][35] Here we show that signatures of a transition sharing some of the features associated to the effective geometric phase may be observed in the anisotropy oscillations considered in this work.…”

Section: Imprints Of Geometric Phase Switchingsupporting

confidence: 62%

Spin interferometry in anisotropic spin-orbit fields

et al. 2018

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Electron spins in a two-dimensional electron gas (2DEG) can be manipulated by spin-orbit (SO) fields originating from either Rashba or Dresselhaus interactions with independent isotropic characteristics. Together, though, they produce anisotropic SO fields with consequences on quantum transport through spin interference. Here we study the transport properties of modelled mesoscopic rings subject to Rashba and Dresselhaus [001] SO couplings in the presence of an additional inplane Zeeman field acting as a probe. By means of 1D and 2D quantum transport simulations we show that this setting presents anisotropies in the quantum resistance as a function of the Zeeman field direction. Moreover, the anisotropic resistance can be tuned by the Rashba strength up to the point to invert its response to the Zeeman field. We also find that a topological transition in the field texture that is associated with a geometric phase switching is imprinted in the anisotropy pattern. We conclude that resistance anisotropy measurements can reveal signatures of SO textures and geometric phases in spin carriers.

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Section: Imprints Of Geometric Phase Switchingsupporting

confidence: 62%

Spin interferometry in anisotropic spin-orbit fields

et al. 2018

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“…Finally, we notice that the scope of our approach is best understood in the semiclassical limit of large momentum (where a dynamical decoupling emerges between charge and spin dynamics) by mapping the spin carrier problem into a time-dependent one with localized spins. 16…”

Section: Discussionmentioning

confidence: 99%

“…It is worthy of mention that, in the limit 1 considered here, the spin dynamics of the carriers maps into a time-dependent problem with localized spins subject to an external driving (by, basically, identifying the polar angle ϕ with the time t in the ring's case). 16 This eventually leads to the finding of a scalar analogue of the geometric vector potential encoding the AA geometric phases accumulated by the spin due to the driving. 16 Moreover, it has been shown that a parity transition in the effective Berry phase also exists to a great approximation in this case.…”

Section: B Case Study 2: Topological Transitions In 1d Ringsmentioning

confidence: 99%

“…16 This eventually leads to the finding of a scalar analogue of the geometric vector potential encoding the AA geometric phases accumulated by the spin due to the driving. 16 Moreover, it has been shown that a parity transition in the effective Berry phase also exists to a great approximation in this case. The mapping to a time-dependent problem has the significant advantage to clarify the limits of our approach in terms of spin resonances at the same time that it opens a door to a new class of resonance experiments for the study of topological transitions in spin and other two-level systems.…”

Section: B Case Study 2: Topological Transitions In 1d Ringsmentioning

confidence: 99%

“…The mapping to a time-dependent problem has the significant advantage to clarify the limits of our approach in terms of spin resonances at the same time that it opens a door to a new class of resonance experiments for the study of topological transitions in spin and other two-level systems. 16…”

Section: B Case Study 2: Topological Transitions In 1d Ringsmentioning

confidence: 99%

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Geometric vector potentials from nonadiabatic spin dynamics

et al. 2017

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We propose a theoretical framework that captures the geometric vector potential emerging from the non-adiabatic spin dynamics of itinerant carriers subject to arbitrary magnetic textures. Our approach results in a series of constraints on the geometric potential and the non-adiabatic geometric phase associated with it. These constraints play a decisive role when studying the geometric spin phase gathered by conducting electrons in ring interferometers under the action of in-plane magnetic textures, allowing a simple characterization of the topological transition recently reported by Saarikoski et al. [Phys. Rev. B 91, 241406(R) (2015)] in Ref. 1.arXiv:1703.07100v3 [cond-mat.mes-hall]

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