249 citations · 2.8k across the 60 of their papers we have counts for
35 papers · 1 filter
Violation of the fluctuation-dissipation theorem and effective temperatures in spin ice
Valentin Raban, Ludovic Berthier, Peter C. W. Holdsworth
We present numerical tests of the fluctuation-dissipation theorem (FDT) in the dumbbell model of spin ice with parameters suitable for dysprosium titanate. The tests are made for l…
The effect of driving on model C interfaces
David S. Dean, Paul Gersberg, Peter C. W. Holdsworth
We consider the effect of uniform driving on the interface between two phases which are described by model C dynamics. The non-driven system has a classical Gaussian interface desc…
Electric field fluctuations in the two-dimensional Coulomb fluid
Callum Gray, Steven T. Bramwell, Peter C. W. Holdsworth
The structure factor for electric field correlations in the two dimensional Coulomb fluid is simulated and compared to theories of the dielectric function. Singular changes in the…
An electric-field representation of the harmonic XY model
Michael F. Faulkner, Steven T. Bramwell, Peter C. W. Holdsworth
The two-dimensional harmonic XY (HXY) model is a spin model in which the classical spins interact via a piecewise parabolic potential. We argue that the HXY model should be regarde…
Spin Ice Thin Film: Surface Ordering, Partial Magnetic Wetting and Emergent Square Ice
L. D. C. Jaubert, T. Lin, T. S. Opel +2
Motivated by recent realizations of DyTiO and HoTiO spin ice thin films, and more generally by the physics of confined gauge fields, we study a…
Critical Casimir forces from the equation of state of quantum critical systems
Adam Rancon, Louis-Paul Henry, Félix Rose +4
The mapping between a classical length and inverse temperature as imaginary time provides a direct equivalence between the Casimir force of a classical system in dimensions and…
Direct calculation of the critical Casimir force in a binary fluid
Francesco Puosi, David Lopes Cardozo, Sergio Ciliberto +1
We show that critical Casimir effects can be accessed through direct simulation of a model binary fluid passing through the demixing transition. We work in the semi grand canonical…
Field-Induced Ordering in Dipolar Spin Ice
Wen-Han Kao, Peter Holdsworth, Ying-Jer Kao
We present numerical studies of dipolar spin ice in the presence of a magnetic field slightly tilted away from the [111] axis. We find a first-order transition from a kagome ice to…
Finite-size scaling of the magnetization probability density for the critical Ising model in slab geometry
David Lopes Cardozo, Peter C. W. Holdsworth
The magnetization probability density in d=2 and 3 dimensional Ising models in slab geometry of volume is computed through Monte-Carlo simula…
Phase order in superfluid helium films
Steven T. Bramwell, Michael F. Faulkner, Peter C. W. Holdsworth +1
Classic experimental data on helium films are transformed to estimate a finite-size phase order parameter that measures the thermal degradation of the condensate fraction in the tw…
Topological-sector fluctuations and ergodicity breaking at the Berezinskii-Kosterlitz-Thouless transition
Michael F. Faulkner, Steven T. Bramwell, Peter C. W. Holdsworth
The Berezinskii-Kosterlitz-Thouless (BKT) phase transition drives the unbinding of topological defects in many two-dimensional systems. In the two-dimensional Coulomb gas, it corre…
AC Wien effect in spin ice, manifest in non-linear non-equilibrium susceptibility
Vojtěch Kaiser, Steven T. Bramwell, Peter C. W. Holdsworth +1
We predict the non-linear non-equilibrium response of a "magnetolyte", the Coulomb fluid of magnetic monopoles in spin ice. This involves an increase of the monopole density due to…
Critical Casimir forces in a magnetic system: An experimental protocol
David Lopes Cardozo, Hugo Jacquin, Peter C. W. Holdsworth
We numerically test an experimentally realizable method for the extraction of the critical Casimir force based on its thermodynamic definition as the derivative of the excess free…
Magnetic-Moment Fragmentation and Monopole Crystallization
Marion Brooks-Bartlett, Simon T. Banks, Ludovic D. C. Jaubert +2
The Coulomb phase, with its dipolar correlations and pinch-point-scattering patterns, is central to discussions of geometrically frustrated systems, from water ice to binary and mi…
Dissipation induced non-Gaussian energy fluctuations
Eric Bertin, Peter C. W. Holdsworth
The influence of dissipation on the fluctuation statistics of the total energy is investigated through both a phenomenological and a stochastic model for dissipative energy-transfe…
Topological Sector Fluctuations and Curie Law Crossover in Spin Ice
Ludovic D. C. Jaubert, Mark J. Harris, Tom Fennell +3
At low temperatures, a spin ice enters a Coulomb phase - a state with algebraic correlations and topologically constrained spin configurations. In Ho2Ti2O7, we have observed experi…
Spin ice under pressure: symmetry enhancement and infinite order multicriticality
Ludovic D. C. Jaubert, J. T. Chalker, Peter C. W. Holdsworth +1
We study the low-temperature behaviour of spin ice when uniaxial pressure induces a tetragonal distortion. There is a phase transition between a Coulomb liquid and a fully magnetis…
The Kasteleyn transition in three dimensions: spin ice in a [100] field
Ludovic D. C. Jaubert, J. T. Chalker, P. C. W. Holdsworth +1
We discuss the nearest neighbour spin ice model in the presence of a magnetic field placed along the cubic [100] direction. As recently shown in Phys. Rev. Lett. 100, 067207, 2008,…
Site Dilution in the Half-Filled One-Band Hubbard Model: Ring Exchange, Charge Fluctuations and Application to La2Cu_{1-x}(Mg/Zn)_xO4
J. -Y. P. Delannoy, A. G. Del Maestro, M. J. P. Gingras +1
We study the ground state quantum spin fluctuations around the Néel ordered state for the one-band () Hubbard model on a site-diluted square lattice. An effective spin Hamilto…
Extreme statistics and volume fluctuations in a confined one-dimensional gas
Eric Bertin, Maxime Clusel, Peter C. W. Holdsworth
We consider the statistics of volume fluctuations in a one-dimensional classical gas of non-interacting particles confined by a piston, and subjected to an arbitrary external poten…
Universal Window for Two Dimensional Critical Exponents
Andrea Taroni, Steven T. Bramwell, Peter C. W. Holdsworth
Two dimensional condensed matter is realised in increasingly diverse forms that are accessible to experiment and of potential technological value. The properties of these systems a…
A Three Dimensional Kasteleyn Transition: Spin Ice in a [100] Field
Ludovic D. C. Jaubert, J. T. Chalker, Peter C. W. Holdsworth +1
We examine the statistical mechanics of spin-ice materials with a [100] magnetic field. We show that the approach to saturated magnetisation is, in the low-temperature limit, an ex…
Origin of the approximate universality of distributions in equilibrium correlated systems
Maxime Clusel, Jean-Yves Fortin, Peter C. W. Holdsworth
We propose an interpretation of previous experimental and numerical experiments, showing that for a large class of systems, distributions of global quantities are similar to a dist…
Criterion for universality class independent critical fluctuations: example of the 2D Ising model
Maxime Clusel, Jean-Yves Fortin, Peter C. W. Holdsworth
Order parameter fluctuations for the two dimensional Ising model in the region of the critical temperature are presented. A locus of temperatures T*(L) and of magnetic fields B*(L)…