CT-QMC: New methods for correlated electrons

Andrew J. Millis, Columbia University, DMR 0705847

Millis has pioneered the development of a new method for computing the behavior of materials such as as heavy fermions, copper-oxide and pnictide superconductors, where strong (beyond band theory) correlations are crucial. The methods have rapidly become the ‘state of the art’ for this class of physics problems and are now being extended to treat the nonequilibrium physics arising in nanodevices. An example, the calculation of the optical conductivity of high Tc materials, is shown in the upper panel on the right. With M. R. Norman (Argonne) Millis has shown how “stripe” ordering controls transport in high temperature superconductors. The image on the lower right, of the photoemission spectrum implied by the Millis-Norman theory, was selected by the APS as one of the physics images on its web page

Conference and Summer Schools

Andrew J. Millis, Columbia University, DMR 0705847

•Advisory board, US Summer School in condensed Matter Physics and Materials Science•Organized conference at Instituut Lorentz in Leiden (Netherlands) on Novel Numerical Methods in correlated electron systems•Lectured at ‘Beg Rohu’ Summer School on nonequilibrium quantum field theory