scholarly journals Edge-spin-derived magnetism in few-layer MoS2 nanomeshes

AIP Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 125019 ◽  
Author(s):  
G. Kondo ◽  
N. Yokoyama ◽  
S. Yamada ◽  
Y. Hashimoto ◽  
C. Ohata ◽  
...  
Keyword(s):  
Edge Spin

scholarly journals Edge-spin accumulation in semiconductor two-dimensional hole gases

2005 ◽  
Vol 72 (24) ◽  
Author(s):  
K. Nomura ◽  
J. Wunderlich ◽  
Jairo Sinova ◽  
B. Kaestner ◽  
A. H. MacDonald ◽  
...  
Keyword(s):  
Spin Accumulation ◽  
Two Dimensional ◽  
Edge Spin

EDGE MAGNETISM AND QUANTUM SPIN HALL EFFECT IN ZIGZAG GRAPHENE NANORIBBON

2013 ◽  
Vol 27 (15) ◽  
pp. 1362011 ◽  
Author(s):  
JUN-WON RHIM ◽  
KYUNGSUN MOON
Keyword(s):  
Electric Field ◽  
Hall Effect ◽  
Graphene Nanoribbon ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Nonmonotonic Dependence ◽  
Quantum Spin Hall Effect ◽  
Edge Spin ◽  
Edge Band ◽  
Quantum Spin Hall

We present here a brief review on the remarkable consequences of the flat bands formed at the edges of the Zigzag graphene nanoribbon (ZGNR). The inclusion of the on-site Coulomb interaction is shown to induce the edge spin ferromagnetism, whose spin stiffness demonstrates a nonmonotonic dependence on the lateral electric field. The critical electric field strength corresponds to that of the insulator to half-metal transition. The inclusion of the spin–orbit coupling (SOC) has been believed to generate the quantum spin Hall effect (QSHE) guiding into the interesting new field of topological insulator. By carefully investigating the SOC near the edge, we have shown that the additional σ-edge band gives a marginal perturbation and hence the existence of the QSHE depends on the coupling strength between the π-edge bands and the σ-edge band. We demonstrate that for the charge neutral ZGNR, the QSHE does not occur in the pristine ZGNR, while the hydrogen passivation along the edge may recover the expected feature of the QSHE.

scholarly journals A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
D. Ghader ◽  
A. Khater
Keyword(s):  
Spin Waves ◽  
Experimental Studies ◽  
Classical Field Theory ◽  
Experimental Investigations ◽  
Theory Approach ◽  
Magnetic Excitations ◽  
Spintronic Devices ◽  
New Class ◽  
Potential Applications ◽  
Edge Spin

Abstract Antiferromagnetic two-dimensional (2D) materials are currently under intensive theoretical and experimental investigations in view of their potential applications in antiferromagnet-based magnonic and spintronic devices. Recent experimental studies revealed the importance of magnetic anisotropy and of Dzyaloshinskii-Moriya interactions (DMI) on the ordered ground state and the magnetic excitations in these materials. In this work we present a robust classical field theory approach to study the effects of anisotropy and the DMI on the edge and bulk spin waves in 2D antiferromagnetic nanoribbons. We predict the existence of a new class of nonreciprocal edge spin waves, characterized by opposite polarizations in counter-propagation. These novel edge spin waves are induced by the DMI and are fundamentally different from conventional nonreciprocal spin waves for which the polarization is independent of the propagation direction. We further analyze the effects of the edge structures on the magnetic excitations for these systems. In particular, we show that anisotropic bearded edge nanoribbons act as topologically trivial magnetic insulators with potentially interesting applications in magnonics. Our results constitute an important finding for current efforts seeking to establish unconventional magnonic devices utilizing spin wave polarization.

scholarly journals Unitarity of scattering and edge spin accumulation

2013 ◽  
Vol 87 (7) ◽  
Author(s):  
Alexander Khaetskii ◽  
Eugene Sukhorukov
Keyword(s):  
Spin Accumulation ◽  
Edge Spin

scholarly journals Zero-field skyrmionic states and in-field edge-skyrmions induced by boundary tuning

2022 ◽  
Vol 5 (1) ◽  
Author(s):  
Jonas Spethmann ◽  
Elena Y. Vedmedenko ◽  
Roland Wiesendanger ◽  
André Kubetzka ◽  
Kirsten von Bergmann
Keyword(s):  
Spin Dynamics ◽  
Transverse Component ◽  
Scanning Tunneling ◽  
Zero Field ◽  
Tunneling Microscopy ◽  
Pinning Effect ◽  
Field Edge ◽  
Dynamics Simulations ◽  
Magnetic Skyrmions ◽  
Edge Spin

AbstractWhen magnetic skyrmions are moved via currents, they do not strictly travel along the path of the current, instead their motion also gains a transverse component. This so-called skyrmion Hall effect can be detrimental in potential skyrmion devices because it drives skyrmions towards the edge of their hosting material where they face potential annihilation. Here we experimentally modify a skyrmion model system—an atomic Pd/Fe bilayer on Ir(111)—by decorating the film edge with ferromagnetic Co/Fe patches. Employing spin-polarized scanning tunneling microscopy, we demonstrate that this ferromagnetic rim prevents skyrmion annihilation at the film edge and stabilizes skyrmions and target states in zero field. Furthermore, in an external magnetic field the Co/Fe rim can give rise to skyrmions pinned to the film edge. Spin dynamics simulations reveal how a combination of different attractive and repulsive skyrmion-edge interactions can induce such an edge-pinning effect for skyrmions.

scholarly journals Information processing in patterned magnetic nanostructures with edge spin waves

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Antonio Lara ◽  
Javier Robledo Moreno ◽  
Konstantin Y. Guslienko ◽  
Farkhad G. Aliev
Keyword(s):  
Information Processing ◽  
Spin Waves ◽  
Magnetic Nanostructures ◽  
Edge Spin
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