Seminar

Fascinating properties of cuprates

Dr. Adam Kaminski
Iowa State University
Tuesday, October 30
Higgins 235, 2 pm

High temperature superconductivity is one of the most difficult problems in modern condensed matter physics. It exists (as far as we know) only in one family of materials that contain quasi 2D CuO layers. In addition to high temperature superconductivity, these materials display wide range of fascinating properties that cannot be understood within the framework of classical models. Examples of such behavior include pseudogap, linear resistivity down to lowest temperatures, which signifies break down of Fermi liquid and very strong electronic mass renormalization in the superconducting state. Some of the materials from this family have a structure that contains 1D CuO chains and 2D CuO2 planes. This offers us unique possibility to study physics of 1D electron system and coupling effects that break true one dimensionality.  In this talk I will discuss recent data from angle resolved photoemission spectroscopy that sheds new light on the origin of some of these properties and their relation to high temperature superconductivity.