86 citations · 447 across the 18 of their papers we have counts for
18 papers
Partial Antiferromagnetic Helical Order in FePOO
C. L. Sarkis, M. J. Tarne, J. R. Neilson +4
Magnetic frustration in FePOO has been shown to produce to an unusual magnetic state below T K, where incommensurate antiferromagnetic order is restricted to…
Short range order in the quantum XXZ honeycomb lattice material BaCo(PO)
H. S. Nair, J. M. Brown, E. Coldren +5
We present observations of highly frustrated quasi two-dimensional (2D) magnetic correlations in the honeycomb lattice layers of the S = 1/2 compound -BaCo(PO)$_…
Doubly Quantized Vortices in Bulk Ginzburg-Landau Superconductors
Mark C. Sweeney, Martin P. Gelfand
We have extended Brandt's method for accurate, efficient calculations within Ginzburg-Landau theory for periodic vortex lattices at arbitrary mean induction to lattices of "doubly…
Simple Vortex States in Films of Type-I Ginzburg-Landau Superconductor
Mark C. Sweeney, Martin P. Gelfand
Sufficiently thin films of type-I superconductor in a perpendicular magnetic field exhibit a triangular vortex lattice, while thick films develop an intermediate state. To elucidat…
Disorder from Disorder in a Strongly Frustrated Transverse Field Ising Chain
D. J. Priour, M. P. Gelfand, S. L. Sondhi
We study a one-dimensional chain of corner-sharing triangles with antiferromagnetic Ising interactions along its bonds. Classically, this system is highly frustrated with an extens…
Finite-size calculations of spin-lattice relaxation rates in Heisenberg spin-ladders
Martin P. Gelfand, Mohan Mahadevan
Calculations of nuclear spin-lattice relaxation rates are carried out by means of exact diagonalization on small (2 x 6) antiferromagnetic Heisenberg ladders, using the simplest fo…
Bond-Operator Mean Field Theory for the Bilayer Heisenberg Model
Yasuhiro Matsushita, Martin P. Gelfand, Chikara Ishii
Bond-operator mean field equations for the square-lattice, S=1/2 bilayer Heisenberg model are developed and solved numerically. In the vicinity of both the zero-field critical poin…
Phase Transitions in Bilayer Heisenberg Model with General Couplings
Yasuhiro Matsushita, Martin P. Gelfand, Chikara Ishii
The ground state properties and phase diagram of the bilayer square-lattice Heisenberg model are studied in a broad parameter space of intralayer exchange couplings, assuming an an…
Spin-S bilayer Heisenberg models: Mean-field arguments and numerical calculations
Martin P. Gelfand, Zheng Weihong, C. J. Hamer +1
Spin-S bilayer Heisenberg models (nearest-neighbor square lattice antiferromagnets in each layer, with antiferromagnetic interlayer couplings) are treated using dimer mean-field th…
Tests of magnetic Hamiltonians for CaV_4O_9
Martin P. Gelfand, Rajiv R. P. Singh
We study the uniform magnetic susceptibility and spin-gap for recently proposed Heisenberg model Hamiltonians for CaV_4O_9 based on the orbital ordering scenario of Marini and Khom…
Local susceptibilities in semi-infinite antiferromagnet chains: elementary perspectives
Martin P. Gelfand, Elisabeth F. Gloeggler
Using conformal field theory methods Eggert and Affleck have shown that the semi-infinite S=1/2 Heisenberg antiferromagnetic chain exhibits a remarkable alternation in its local re…
Convergent expansions for properties of the Heisenberg model for CaVO
M. P. Gelfand, Z. Weihong, R. R. P. Singh +2
We have carried out a wide range of calculations for the Heisenberg model with nearest- and second-neighbor interactions on a two-dimensional lattice which describes the ge…
Spin-wave excitation spectra and spectral weights in square lattice antiferromagnets
Rajiv R. P. Singh, Martin P. Gelfand
Using a recently developed method for calculating series expansions of the excitation spectra of quantum lattice models, we obtain the spin-wave spectra for square lattice, …
Series Expansions for Excited States of Quantum Lattice Models
Martin P. Gelfand
We show that by means of connected-graph expansions one can effectively generate exact high-order series expansions which are informative of low-lying excited states for quantum ma…
Phase Transitions in the Symmetric Kondo Lattice Model in Two and Three Dimensions
Zhu-Pei Shi, Rajiv R. P. Singh, Martin P. Gelfand +1
We present an application of high-order series expansion in the coupling constants for the ground state properties of correlated lattice fermion systems. Expansions have been gener…
Off-diagonal Interactions, Hund's Rules and Pair-binding in Hubbard Molecules
S. L. Sondhi, M. P. Gelfand, H. Q. Lin +1
We have studied the effect of including nearest-neighbor, electron-electron interactions, in particular the off-diagonal (non density-density) terms, on the spectra of truncated te…
A Plane of Weakly Coupled Heisenberg Chains: Theoretical Arguments and Numerical Calculations
Ian Affleck, Martin P. Gelfand, Rajiv R. P. Singh
The , nearest-neighbor, quantum Heisenberg antiferromagnet on the square lattice with spatially anisotropic couplings is reconsidered, with particular attention to the follo…
Off-Diagonal Long Range Order and Scaling in a Disordered Quantum Hall System
S. L. Sondhi, M. P. Gelfand
We have numerically studied the bosonic off-diagonal long range order, introduced by Read to describe the ordering in ideal quantum Hall states, for noninteracting electrons in ran…