Research Materials are posted on this page, relating to various recent publications:

4) Strong correlations produce the Curie Weiss phase, is the main message of a recent paper from our group including Jan Haerter and Mike Peterson. The name “Curie Weiss phase” was coined by the Princeton group of Phuan Ong, Bob Cava, Yayu Wang and coworkers, to describe a novel phase of matter where the metallic electrons display many magnetic characteristics of localized electrons, together with an exceptionally high Seebeck coefficient. We are computing several interesting thermal transport objects such as the thermo-power, Lorentz number, Hall constant for correlated matter….as described in Paper(3) below. A sampling of our ongoing paper can be found here.

“Strong Correlations Produce the Curie-Weiss Phase of NaxCoO2”

“Finite-temperature properties of the triangular lattice t-J model and applications to NaxCoO2”

3) A recent paper on the dynamical thermal conductivity in condensed matter is available  below.  A new sum rule for this object is obtained,  as well as a new formalism for computing the effect of correlations on thermopower and thermal conductivity can be found in our paper:

" Sum rule for thermal conductivity and dynamical thermal transport coefficients in condensed matter"

by B. Sriram Shastry, Physical Review  B 73, 085117 (2006).

With an erratum Phys. Rev. B 74, 039901 (2006)

Regrettably, several typos have found their way into the above paper, and I as well as my colleagues continue to find more typos, subsequent to the above erratum. As a partial penance, I am maintaining a list of errors and also a corrected pdf file where all noted errors are corrected. If you find more, please let me know, so I can make the corrections.

2) Pictures of clusters of the hopping model  on a triangular lattice that are used in our paper

"Kinetic Antiferromagnetism in the Triangular Lattice" by Jan O. Haerter and B. Sriram Shastry

Phys. Rev. Letts. 95, 087202 (2005).

A semipopular account of this work was carried in the scientific press recently.

1) Mathematica notebook called demo_shastry.nb. This relates to the paper

A class of parameter-dependent commuting matrices, by  B Sriram Shastry J. Phys. A38,  L431(2005).

This program enables the user to construct families of finite real symmetric dimensional matrices in any dimension "d" with the property that these matrices commute with each other for all values of a real parameter. Each member of this family violates the Wigner-Von Neumann theorem on real symmetric matrices, which tells us that the variation of a single parameter should lead to level repulsion in general. This violation is a clear sign that the matrices constructed here are not "generic", in fact we argue that these are finite dimensional examples of what are known as "quantum integrable models".