{"id":1916,"date":"2023-05-25T21:23:05","date_gmt":"2023-05-25T21:23:05","guid":{"rendered":"https:\/\/dornsife.usc.edu\/physics\/?page_id=1916"},"modified":"2023-05-25T21:51:27","modified_gmt":"2023-05-25T21:51:27","slug":"colloquium-spring-1997","status":"publish","type":"page","link":"https:\/\/dornsife.usc.edu\/physics\/colloquia\/colloquium-archive\/colloquium-spring-1997\/","title":{"rendered":"Colloquium Spring 1997"},"content":{"rendered":"\n\n \n \n\n\n\n\n\n\n\n
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January 27<\/strong><\/p>\n

d-wave Superconductivity in the Cuprates<\/strong>
\nNejat Bulut<\/a>
\nDept. of Physics,\u00a0UCSB<\/p>\n

Abstract<\/strong><\/p>\n

The high temperature superconductors have very interesting electronic properties. For instance, there is strong experimental evidence that the superconducting gap function has the unconventional d-wave symmetry. Experiments also suggest that the antiferromagnetic spin fluctuations and Coulomb correlations play an important role in producing the unusual electronic properties of these materials. Numerical calculations on simple models have been particularly helpful in understanding how d-wave pairing might arise in these materials and how the proximity to the metal-insulator transition modifies the electronic excitations. In this talk we will discuss, in simple terms, the experimental results on the electronic properties of these materials and what we have learned from numerical calculations of simple models. We will also discuss the search for other high temperature superconductors and the newly discovered superconducting cuprate ladder compounds.<\/p>\n

February 3<\/strong><\/p>\n

The Comprehensive Test Ban Treaty and Reducing Nuclear Danger<\/strong>
\nSid Drell
\nSLAC,\u00a0Stanford University<\/p>\n

February 10<\/strong><\/p>\n

Mimicking the Sense of Smell: Use of Conducting Polymer Composite Arrays as an Electronic Nose<\/strong>
\nNathan S. Lewis<\/a>
\nDivision of Chemistry,\u00a0California Institute of Technology<\/p>\n

February 24<\/strong><\/p>\n

On the Road to the Solution of the Solar Neutrino Problem<\/strong>
\nEric Norman<\/a>
\nLawrence Berkeley Laboratory,\u00a0University of California, Berkeley<\/p>\n

Abstract<\/strong><\/p>\n

The present status of the Homestake, GALLEX, SAGE, and Kamiokande solar neutrino experiments will be reviewed. The discrepancy between all of the experimental results and the theoretical expectations has come to be known as the Solar Neutrino Problem. Possible solutions to this problem will be discussed. The next generation of solar neutrino experiments will be described. Among these is the Sudbury Neutrino Observatory (SNO), which will consist of a 1000 tonne heavy water (D2O) Cerenkov detector that is designed to measure the flux, energy spectrum, and direction of neutrinos from the Sun and supernovae. It is presently under construction in a very low background environment 2000 meters underground near Sudbury, Ontario, Canada. The basic measurements that will be made with the SNO detector are:<\/p>\n