Dzyaloshinskii-Moriya interactions in valence-bond systems
نویسندگان
چکیده
منابع مشابه
Exchange bias driven by Dzyaloshinskii-Moriya interactions.
The exchange bias effect in a compensated IrMn3/Co(111) system is studied using multiscale modeling from ab initio to atomistic spin model calculations. We evaluate numerically the out-of-plane hysteresis loops of the bilayer for different thicknesses of the ferromagnetic layer. The results show the existence of a perpendicular exchange bias and an enhancement of the coercivity of the system. T...
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The nearest neighbor spin S = 2 antiferromagnet on the kagome lattice has been the focus of extensive theoretical and experimental study because it is a prime candidate for realizing a ground state without antiferromagnetic order. On the experimental side, much attention has focused on the S = 1/2 compound herbertsmithite ZnCu3(OH)6Cl2. It has J ⇡ 170 K and no observed ordering or structural di...
متن کاملControlling skyrmion helicity via engineered Dzyaloshinskii-Moriya interactions.
Single magnetic skyrmion dynamics in chiral magnets with a spatially inhomogeneous Dzyaloshinskii-Moriya interaction (DMI) is considered. Based on the relation between DMI coupling and skyrmion helicity, it is argued that the latter must be included as an extra degree of freedom in the dynamics of skyrmions. An effective description of the skyrmion dynamics for an arbitrary inhomogeneous DMI co...
متن کاملWide-Range Probing of Dzyaloshinskii–Moriya Interaction
The Dzyaloshinskii-Moriya interaction (DMI) in magnetic objects is of enormous interest, because it generates built-in chirality of magnetic domain walls (DWs) and topologically protected skyrmions, leading to efficient motion driven by spin-orbit torques. Because of its importance for both potential applications and fundamental research, many experimental efforts have been devoted to DMI inves...
متن کاملQuantum phase transition induced by Dzyaloshinskii-Moriya interactions in the kagome antiferromagnet
We argue that the S=1 /2 kagome antiferromagnet undergoes a quantum phase transition when the Dzyaloshinskii-Moriya coupling is increased. For D Dc the system is in a moment-free phase, and for D Dc the system develops antiferromagnetic long-range order. The quantum critical point is found to be Dc 0.1J using exact diagonalizations and finite-size scaling. This suggests that the kagome compound...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.79.024405