Spin current generation by edge plasmons in graphene ribbons

Ukhtary, M. Shoufie; Yuan, Tian; Saito, Riichiro

doi:10.1103/physrevb.103.245428

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…The magnetic field can interact with the electron spin. Indeed, conduction electron spin currents can be driven by the SPPs at a single surface [94][95][96], a metallic film [97,98], and in graphene [99,100]. Secondly, the SAM vector in the Poincaré sphere is regarded as an optical correspondence of the magnetization vector in magnetic skyrmion systems.…”

Section: Discussionmentioning

confidence: 99%

Transverse spin angular momentum of space-time surface plasmon polariton wave packet

Ichiji¹,

Oue²,

Yessenov³

et al. 2023

Preprint

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Section: Discussionmentioning

confidence: 99%

Transverse spin angular momentum of space-time surface plasmon polariton wave packet

Ichiji¹,

Oue²,

Yessenov³

et al. 2023

Preprint

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“…The dipolar interaction has been studied in magnetism for many decades, but the analogy with the spin-orbit interaction in creating chirality was emphasized only recently. Recently, many theoretical predictions and experimental discoveries of chiral interactions among magnetic [47][48][49][50][51][52][53][54][55][56][57][58], photonic [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73], phononic [74][75][76][77][78][79][80][81][82], electronic [83], and plasmonic [84][85][86][87][88][89] excitations in spintronics are revealed, which are found to mediate the excitation of quasiparticles into a single direction, leading to phenomena such as chiral spin pumping [50], chiral spin Seebeck [50], chiral phonon pumping by magnetization dynamics [74], magnon diodes <...…”

Section: Chirality As Generalized Spin-orbit Interactionmentioning

confidence: 99%

“…53(a) the excited transverse magnetization and spin polarization lie in the plane of the surface, while the spin current flows perpendicular to it, which renders it difficult to detect. Ukhtary et al [88] proposed to employ the one-dimensional plasmons that propagate along the edges of graphene ribbons [466], that generate an out-of-plane spin polarization and current that flows between the edges as shown in Fig. 53(b).…”

Section: Spin Current Generation By Surface Plasmon Polaritonmentioning

confidence: 99%

Chirality as Generalized Spin-Orbit Interaction in Spintronics

Chen¹,

Luo²,

Bauer³

2022

Preprint

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Chirality or handedness is a digital relation between three vectors that distinguishes an object from its mirror image, such as the spread fingers of the right and left hand. The chirality of ground state magnetic textures defined by the vectors of magnetization, its gradient, and an electric field from broken inversion symmetry can be fixed by a strong relativistic spin-orbit interaction. This review focuses on the chirality observed in the excited states of the magnetic order, dielectrics, and conductors that hold transverse spins when they are evanescent. Even without any relativistic effect, the transverse spin of the evanescent waves are locked to the momentum and the surface normal of their propagation plane. This chirality thereby acts as a generalized spin-orbit interaction, which leads to the discovery of various chiral interactions between magnetic, phononic, electronic, photonic, and plasmonic excitations in spintronics that mediate the excitation of quasiparticles into a single direction, leading to phenomena such as chiral spin and phonon pumping, chiral spin Seebeck, spin skin, magnonic trap, magnon Doppler, and spin diode effects. Intriguing analogies with electric counterparts in the nano-optics and plasmonics exist. After a brief review of the concepts of chirality that characterize the ground state chiral magnetic textures and chirally coupled magnets in spintronics, we turn to the chiral phenomena of excited states. We present a unified electrodynamic picture for dynamical chirality in spintronics in terms of generalized spin-orbit interaction and compare it with that in nano-optics and plasmonics. Based on the general theory, we subsequently review the theoretical progress and experimental evidence of chiral interaction, as well as the near-field transfer of the transverse spins, between various excitations in magnetic, photonic, electronic and phononic nanostructures at GHz time scales. We provide a perspective for future research before concluding this article.

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“…After the discovery of graphene, researchers have realized that such one-atom thick material can support exceedingly strong surface plasmons that is detectable through, for example, scanning near-field infrared microscopy [10][11][12][13][14][15][16]. This is due to the fact that the conductivity of doped graphene is large enough to cause significant in-plane currents and charge oscillations under incident light pushing the corresponding Drude plasma frequency into the infrared region [17][18][19][20][21][22][23][24][25][26][27][28]. Although the optical conductivity of graphene is isotropic, its imaginary part can be positive or negative depending on the Fermi level as well as the photon energy.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic detection of the parity anomaly in a two-dimensional Chern insulator

Chen,

Zhou

2023

J. Phys.: Condens. Matter

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In this paper, we present an analytic study on the surface plasmon polaritons in a two-dimensional parity anomaly Chern insulator. The two-dimensional conductivities derived from the BHZ model are antisymmetric, based on which two surface plasmon modes each contains two branches of dispersions have been found. In the absence of parity anomaly, the half-integer-valued Hall conductivities with positive and negative Dirac mass terms differ by a sign; two branches of each surface plasmon mode are exactly degenerate. However, the parity anomaly can lift such degeneracy and lead to significant modifications of these dispersion curves or even the occurrence of an extra branch of surface plasmons under particular condition. Our investigations have revealed the effects of the interplay of parity anomaly and topology on the dispersion relations of the surface plasmon polaritons, which may pave a possible way for the detection of the parity anomaly in a two-dimensional Chern insulator via plasmonic responses.

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Spin current generation by edge plasmons in graphene ribbons

Cited by 7 publications

References 32 publications

Transverse spin angular momentum of space-time surface plasmon polariton wave packet

Transverse spin angular momentum of space-time surface plasmon polariton wave packet

Chirality as Generalized Spin-Orbit Interaction in Spintronics

Plasmonic detection of the parity anomaly in a two-dimensional Chern insulator

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