68 citations · 135 across the 5 of their papers we have counts for
5 papers
The "Square Kagome" Quantum Antiferromagnet and the Eight Vertex Model
Rahul Siddharthan, Antoine Georges
We introduce a two dimensional network of corner-sharing triangles with square lattice symmetry. Properties of magnetic systems here should be similar to those on the kagome lattic…
Ordering and partial ordering in holmium titanate and related systems
R. Siddharthan, B. S. Shastry, A. P. Ramirez
We take another look at two compounds which have been discussed as possible realizations of ``spin ice'', namely holmium titanate and dysprosium titanate. As we have earlier observ…
Exact ground state and kink-like excitations of a two dimensional Heisenberg antiferromagnet
Rahul Siddharthan
A rare example of a two dimensional Heisenberg model with an exact dimerized ground state is presented. This model, which can be regarded as a variation on the kagome lattice, has…
Singularities in the Bethe solution of the XXX and XXZ Heisenberg spin chains
Rahul Siddharthan
We examine the question of whether Bethe's ansatz reproduces all states in the periodic Heisenberg XXZ and XXX spin chains. As was known to Bethe himself, there are states for whic…
The Quantum Toda Lattice Revisited
Rahul Siddharthan, B. Sriram Shastry
In this work we study the quantum Toda lattice, developing the asymptotic Bethe ansatz method first used by Sutherland. Despite its known limitations we find, on comparing with Gut…