233 citations · 305 across the 5 of their papers we have counts for
5 papers
Spin wave analysis of Heisenberg magnets in restricted geometries
N. B. Ivanov, D. Sen
In the last decade it has been proven that the standard spin wave theory was able to provide accurate zero-temperature results for a number of low-dimensional Heisenberg spin syste…
A DMRG Study of Low-Energy Excitations and Low-Temperature Properties of Alternating Spin Systems
Swapan K. Pati, S. Ramasesha, Diptiman Sen
We use the density matrix renormalization group (DMRG) method to study the ground and low-lying excited states of three kinds of uniform and dimerized alternating spin chains. The…
DMRG Studies of the Spin-Half Heisenberg System with Dimerization and Frustration
R. Chitra, Swapan K. Pati, H. R. Krishnamurthy +2
Using the density matrix renormalization group technique, we study the ground state phase diagram and other low-energy properties of an isotropic antiferromagnetic spin-half chain…
A Bosonic Mean-Field Theory for Frustrated Heisenberg Antiferromagnets in Two Dimensions
R. Chitra, Sumathi Rao, Diptiman Sen
We use a recently developed bosonic mean-field theory (MFT) to study the ordered ground states of frustrated Heisenberg antiferromagnets (FHAFM) in two dimensions. We emphasize the…
Bosonic Mean Field Theory of the Spiral Phases of Heisenberg Antiferromagnets on a Chain
Sumathi Rao, Diptiman Sen
We develop a novel bosonic mean field theory to describe the spiral phases of a Heisenberg antiferromagnet on a one-dimensional chain, in terms of three bosons at each site. The gr…