| | |
| | |
Stat |
Members: 3667 Articles: 2'599'751 Articles rated: 2609
15 February 2025 |
|
| | | |
|
Article overview
| |
|
A Kagome Map of Spin Liquids: from XXZ to Dzyaloshinskii-Moriya Ferromagnet | K. Essafi
; Owen Benton
; Ludovic D.C. Jaubert
; | Date: |
1 Aug 2015 | Abstract: | The kagome lattice sits at the crossroad of present research efforts in
quantum spin liquids, chiral phases, emergent skyrmion excitations and
anomalous Hall effects to name but a few. In light of this diversity, our goal
in this paper is to build a unifying picture of the underlying magnetic
degrees-of-freedom on kagome. Motivated by a growing mosaic of materials, we
especially consider a broad range of nearest-neighbour interactions consisting
of Dzyaloshinskii-Moriya as well as anisotropic ferro$-$ and antiferromagnetic
coupling. We present a three-fold mapping on the kagome lattice which
transforms the celebrated Heisenberg antiferromagnet and XXZ model onto two
lines of time-reversal invariant Hamiltonians. The mapping is exact for
classical and quantum spins alike, i.e. it preserves the energy spectrum of the
original Heisenberg and XXZ models. As a consequence, at the classical level,
all phases have an extensive ground-state degeneracy. These ground states
support a variety of phenomena such as ferromagnetically induced pinch points
in the structure factor and the possibility for spontaneous scalar chirality.
For quantum spin$-1/2$, the XXZ model has been recently shown to be a quantum
spin liquid. Applying our three-fold mapping to the XXZ model gives rise to a
connected network of quantum spin liquids, centered around a paragon of quantum
disorder, namely the Ising antiferromagnet. We show that this quantum disorder
spreads over an extended region of the phase diagram at linear order in spin
wave theory, which overlaps with the parameter region of Herbertsmithite
ZnCu$_3$(OH)$_6$Cl$_2$. We conclude this work by discussing the connection of
our results to the chiral spin liquids found on kagome with further
nearest-neighbour interactions, and to the recently synthesized ternary
intermetallic materials. | Source: | arXiv, 1508.0113 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|