Juan Carlos Campuzano
Professor, Department of Physics, UIC
Professor Campuzano jointly supervises CDAC students working in Thrust 3: Complex Materials, Thrust 7: Superconductivity and Electronic and Magnetic Phenomena.
Professor Campuzano's research is in many areas of condensed matter physics, such as critical phenomena and two-dimensional phase transitions, the electronic structure of high temperature superconductors, and the development of techniques for studying empty electron energy levels in solids. A very-high-resolution low energy electron diffractometer was developed. This instrument has allowed him to confirm several predictions, such as the nature of the fluctuations in continuous two-dimensional phase transitions. More recently, he has shown that a newly discovered symmetry in nature, called conformal invariance, allows the calculation of the scattering behavior of particles from a material undergoing a phase transition without any knowledge of the details of the interaction. In the field of high temperature superconductivity, his group is determining the electronic structure of these exciting new compounds by photoemission spectroscopy, in which the sample is bombarded with ultraviolet light, releasing electrons that are analyzed to determine their original energy states in the sample. Major results from this work are the observation of a normal state with a Luttinger Fermi surface, flat bands in the dispersion, the momentum dependence of the superconducting gap, the pseudogap in the charge channel, the existance of Femi arcs, time reversal symmetry breaking, etc.
- Evolution of the pseudogap from Fermi arcs to the nodal liquid, A. Kanigel, et al. Nature Physics 2, 447 (2006). Protected Nodes and the Collapse of Fermi Arcs in High-Tc Cuprate Superconductors, A. Kanigel, et al. Phys. Rev. Lett. 99, 157001 (2007)
- Coherent d-Wave Superconducting Gap in Underdoped La2-xSrxCuO4 by Angle-Resolved Photoemission Spectroscopy, M. Shi, et al. Phys. Rev. Lett. 101, 047002 (2008).
- Evidence for pairing above the transition temperature of cuprate superconductors from the electronic dispersion in the pseudogap phase, A. Kanigel, et al. Phys. Rev. Lett. 101, 137002 (2008).
- Observation of a d-wave nodal liquid in highly underdoped Bi2Sr2CaCu2O8+δ, U. Chatterjee, et al. Nature Physics 6, 99 (2010)
BS, Physics (1972), University of Wisconsin-Milwaukee
MS, Physics (1973), University of Wisconsin-Milwaukee
PhD, Physics (1978), University of Wisconsin-Milwaukee