Proceedings of the National Academy of Sciences of the United States of America

About the PNAS Member Editor
Name Birgeneau, Robert J.
Location University of California, Berkeley
Primary Field Applied Physical Sciences
Secondary Field Physics
 Election Citation
From Canada, Birgeneau has made seminal contributions to the understanding of magnetic critical phenomena. In particular, he pioneered the use of neutron and synchrotron X-ray scattering to demonstrate the importance of dimensionality and randomness in magnetic systems.
 Research Interests
I am a condensed matter physicist who carries out experiments on a variety of different solid and liquid crystal systems. Our primary experimental methods are neutron and synchrotron x-ray scattering. We typically synthesize our own materials and characterize their macroscopic properties with standard techniques. Our focus historically has been on complex materials whose properties are determined in a fundamental way by the effects of dimensionality, quantum fluctuations and/or microscopic quenched disorder. Two systems which we are currently exploring are high temperature superconductors and smectic liquid crystals embedded in dilute silica gel networks. The former is a well researched problem which nevertheless is proving to be remarkably difficult to unravel at a fundamental level. Our own emphasis has been on the microscopic antiferromagnetic fluctuations and their interaction with the superconductivity. The latter represents a new area of research in which disorder and dimensionality effects play a central role. We are currently trying to gather enough basic empirical information to be able to elucidate the fundamental principles which determine the properties of these novel gels.

 
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