141 citations · 526 across the 14 of their papers we have counts for
14 papers
Partial lifting of degeneracy in the Ising antiferromagnet on the kagome lattice
Jeanne Colbois, Bram Vanhecke, Laurens Vanderstraeten +3
Motivated by dipolar-coupled artificial spin systems, we present a theoretical study of the classical Ising antiferromagnet on the kagome lattice. We establish the gr…
Spin-orbit-entangled electronic phases in 4 and 5 transition-metal compounds
Tomohiro Takayama, Jiri Chaloupka, Andrew Smerald +2
Complex oxides with and transition-metal ions recently emerged as a new paradigm in correlated electron physics, due to the interplay between spin-orbit coupling and elec…
Magnon binding in BaCdVO(PO)
Andrew Smerald
The bond-nematic state has both long-range ordering of magnetic quadrupoles and the high entanglement typical of spin liquids, and as such can be thought of as a spin liquid crysta…
Putative spin-nematic phase in BaCdVO(PO)
M. Skoulatos, F. Rucker, G. J. Nilsen +14
We report neutron scattering and AC magnetic susceptibility measurements of the 2D spin-1/2 frustrated magnet BaCdVO(PO). At temperatures well below $T_{\sf N}\approx 1…
Giant Magnetoelastic-Coupling Driven Spin-Lattice Liquid State in Molybdate Pyrochlores
Andrew Smerald, George Jackeli
We propose the idea of a spin-lattice liquid, in which spin and lattice degrees of freedom are strongly coupled and remain disordered and fluctuating down to low temperatures. We s…
Spin-liquid behaviour and the interplay between Pokrovsky-Talapov and Ising criticality in the distorted, triangular-lattice, dipolar Ising antiferromagnet
Andrew Smerald, Frederic Mila
We study the triangular-lattice Ising model with dipolar interactions, inspired by its realisation in artificial arrays of nanomagnets. We show that a classical spin-liquid forms a…
Cu-Sb dumbbell arrangement in the spin-orbital liquid candidate BaCuSbO
Michaela Altmeyer, Frederic Mila, Andrew Smerald +1
The absence of both spin freezing and of a static Jahn-Teller effect have lead to the proposition that BaCuSbO is a quantum spin-orbital liquid. However, theoretical un…
Topological aspects of symmetry breaking in triangular-lattice Ising antiferromagnets
Andrew Smerald, Sergey Korshunov, Frederic Mila
Using a specially designed Monte Carlo algorithm with directed loops, we investigate the triangular lattice Ising antiferromagnet with coupling beyond nearest neighbour. We show th…
Disorder driven spin-orbital liquid behaviour in the BaXSbO materials
Andrew Smerald, Frederic Mila
Recent experiments on the BaXSbO family have revealed materials that potentially realise spin- and spin-orbital liquid physics. However, the lattice structure of these…
Ghost in the machine: Theory of inelastic neutron scattering in a field-induced spin-nematic state
Andrew Smerald, Hiroaki T. Ueda, Nic Shannon
The spin-nematic state has proved elusive, due to the difficulty of observing the order parameter in experiment. In this article we develop a theory of spin excitations in a field-…
Exploring the spin-orbital ground state of Ba3CuSb2O9
Andrew Smerald, Frederic Mila
Motivated by the absence of both spin freezing and a cooperative Jahn-Teller effect at the lowest measured temperatures, we study the ground state of Ba3CuSb2O9. We solve a general…
Waves in the unseen : theory of spin excitations in a quantum spin nematic
Andrew Smerald, Nic Shannon
The idea that a quantum magnet could act like a liquid crystal, breaking spin-rotation symmetry without breaking time-reversal symmetry, holds an abiding fascination. However, the…
Spectral evidence of a ghostly transition: Theory of NMR 1/T_1 relaxation in a quantum spin nematic in applied magnetic field
Andrew Smerald, Nic Shannon
There is now strong theoretical evidence that a wide range of frustrated magnets should support quantum spin-nematic order in applied magnetic field. Nonetheless, the fact that spi…
Angle-resolved NMR: quantitative theory of 75As T1 relaxation rate in BaFe2As2
Andrew Smerald, Nic Shannon
While NMR measurements of nuclear energy spectra are routinely used to characterize the static properties of quantum magnets, the dynamical information locked in NMR 1/T1 relaxatio…