Q = 0 order in quantum kagome Heisenberg antiferromagnet

Mondal, Kallol; Kadolkar, Charudatt

doi:10.1088/1361-648x/abdc8e

Cited by 4 publications

(4 citation statements)

References 44 publications

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“…Such RMOs can be constructed for any models on any lattice and hence a general method to construct classical magnetic orders. It turns out that these states are a good candidate as a variational state to study the ground-state phase diagram for many spin systems [12][13][14][15]. It also provides useful insights into the couplings present in a magnetic material by comparing the magnetic correlation where the range or strength of the interactions is not known.…”

Section: Discussionmentioning

confidence: 99%

Regular magnetic orders in triangular and kagome lattices

Mondal¹,

Kadolkar²

2021

J. Phys.: Condens. Matter

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We investigate the possible regular magnetic order (RMO) for the spin models with global O(3) spin rotation, based on a group theoretical approach for triangular and kagome lattices. The main reason to study these RMOs is that they are good variational candidates for the ground states of many specific models. In this work, we follow the prescription introduced by Messio et al (2011 Phys. Rev. B 83 184401) for the p6m group and extended their work for different subgroups of p6m, i.e., p6, p3, p3m1, and p31m. We list all the possible regular magnetic orders for triangular and kagome lattices, which fall into the category of these groups. We calculate the energies and the spin structure factors for each of these states.

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Section: Discussionmentioning

confidence: 99%

Regular magnetic orders in triangular and kagome lattices

Mondal¹,

Kadolkar²

2021

J. Phys.: Condens. Matter

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“…Such RMOs can be constructed for any models on any lattice and hence a general method to construct classical magnetic orders. It turns out that these states are a good candidate as a variational state to study the ground-state phase diagram for many spin systems [11][12][13][14] . It also provides useful insights into the couplings present in a magnetic material by comparing the magnetic correlation where the range or strength of the interactions is not known.…”

Section: Discussionmentioning

confidence: 99%

Regular magnetic orders in triangular and kagome lattices

Mondal,

Kadolkar

2021

Preprint

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We investigate the possible regular magnetic order (RMO) for the spin models with global O(3) spin rotation, based on a group theoretical approach for triangular and kagome lattices. The main reason to study these RMOs is that they are good variational candidates for the ground states of many specific models. In this work, we followed the prescription introduced by Messio et al. (L. Messio, C. Lhuillier, and G. Misguich, Phys. Rev. B, 2011, 83, 184401) for the p6m group and extended their work for different subgroups of p6m, i.e., p6, p3, p3m1, and p31m. We have listed all the possible regular magnetic orders for kagome and triangular lattices, which fall into the category of these groups. We calculate the energy and the spin structure factors for each of these states.

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“…It is quite a significant result in the sense that despite any spin-splitting interaction like spin-orbit coupling, a noticeable degree of spin polarization is achieved just by choosing a specific spin configuration. Such a spin orientation in kagome lattice are dubbed as Q = 0 configuration (Q is known as magnetic wave vector), are already explored extensively [74][75][76][77][78] and appear in many realistic materials even at room temperature [18,[79][80][81][82][83]. In summary, we can say that these types of spin configurations induce the same spin-splitting effect by breaking the spin rotational symmetry, analogous to the spin-orbit coupling.…”

Section: Spin-resolved Transmission Coefficients Spin-dependent Curre...mentioning

confidence: 99%

Spin-dependent transport in a driven non-collinear antiferromagnetic fractal network

Mondal

Ganguly

Maiti

2022

J. Phys.: Condens. Matter

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Non-collinear magnetic texture breaks the spin-sublattice symmetry which gives rise to a spin-splitting effect. Inspired by this, we study the spin-dependent transport properties in a non-collinear antiferromagnetic fractal structure, namely, the Sierpinski Gasket (SPG) triangle. We find that though the spin-up and spin-down currents are different, the degree of spin polarization is too weak. Finally, we come up with a proposal, where the degree of spin polarization can be enhanced significantly in the presence of a time-periodic driving field. Such a prescription of getting spin-filtering effect from an unpolarized source in a fractal network is completely new to the best of our knowledge. Starting from a higher generation of SPG to smaller ones, the precise dependencies of driving field parameters, spin-dependent scattering strength, interface sensitivity on spin polarization are critically investigated. The spatial distribution of spin-resolved bond current density is also explored. Interestingly, our proposed setup exhibits finite spin polarization for different spin-quantization axes. Arbitrarily polarized light is considered and its effect is incorporated through Floquet-Bloch ansatz. All the spin-resolved transport quantities are computed using Green's function formalism following the Landauer-B\"{u}ttiker prescription. In light of the experimental feasibility of such fractal structures and manipulation of magnetic textures, the present work brings forth new insights into spintronic properties of non-collinear antiferromagnetic SPG. This should also entice the AFM spintronic community to explore other fractal structures with the possibility of unconventional features.

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Q = 0 order in quantum kagome Heisenberg antiferromagnet

Cited by 4 publications

References 44 publications

Regular magnetic orders in triangular and kagome lattices

Regular magnetic orders in triangular and kagome lattices

Regular magnetic orders in triangular and kagome lattices

Spin-dependent transport in a driven non-collinear antiferromagnetic fractal network

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