Mark Jarrell , Ph.D.


Mark Jarrell, PhD
Professor of Physics
Ph.D., 1987  University of California, Santa Barbara
Louisiana State University
Department of Physics & Astronomy
285 Nicholson Hall, Tower Dr.
Baton Rouge, LA 708034001
(225) 5787528Office
(225) 5788271CCT
Personal Web Page
Research Interests
My main area of interest lies in the physics of strongly correlated electronic materials which include many nanostructures, high Tc superconductors, and heavy Fermion and magnetic materials. These materials are characterized by one or more of the following phenomena: a MottHubbard insulating phase, magnetism, nonFermi liquid behavior or a very small Fermion degeneracy energy. In general, exact solutions of models of these systems are not possible, and attempts to use uncontrolled analytic techniques have met with limited success. However, in addition to the usual manybody techniques, I have developed techniques which separate the problem into strongly interacting and weakly interacting parts. The weakly interacting parts are treated with either perturbation theory or meanfield approaches, and then integrated out of the action. The remaining strongly interacting part of the action may be mapped to a small effective cluster problem which is treated with Quantum Monte Carlo (QMC) or other nonperturbative approaches. I have also developed methods used to analytically continue QMC imaginary time results to real frequencies. This allows QMC simulations to address experiments such as reflectivity, photoemission, inelastic neutron scattering and transport.
Current and Selected Publications
 N.S.Vidhyadhiraja, A.Macridin, C.Sen, M.Jarrell, Michael Ma, "Quantum Critical Point at Finite Doping in the 2D Hubbard Model: A Dynamical Cluster Quantum Monte Carlo Study," Phys. Rev. Lett. 102, 206407.
 E. Khatami, K. Mikelsons, D. Galanakis, A. Macridin, J. Moreno, R. T. Scalettar, M. Jarrell, "Quantum Criticality Due to Incipient Phase Separation in the Twodimensional Hubbard Model," Phys. Rev. B 81, 201101, arXiv:arXiv:0909.0759.
 A. Macridin, M. Jarrell, Th. Maier, and D.J. Scalapino, "High energy kink in the single particle spectra of the twodimensional Hubbard model," Phys. Rev. Lett. 99, id. 237001 (2007).
 P. R. C. Kent, T. SahaDasgupta, O. Jepsen, O. K. Andersen, A. Macridin, T. A. Maier, M. Jarrell, T. C. Schulthess, "Combined densityfunctional and dynamical cluster quantum Monte Carlo calculations for threeband Hubbard models for holedoped cuprate superconductors," arXiv:0806.3770. Phys. Rev. B 78, 035132 (2008).
 Juana Moreno, Randy S. Fishman, and Mark Jarrell, "Transition Temperature of a Magnetic Semiconductor with Angular Momentum j," Phys. Rev. Lett. 96, 237204 (2006).
