Electrons on the Magnetic Quantum Roundabout - Measuring Fermi Surfaces and Band Renormalisation in Correlated Materials

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• Dr Christoph Bergemann (Physics Department, University of Cambridge)
• Monday 05 June 2006, 11:15-12:15
• Mott Seminar Room, Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Michael Sutherland.

While the dynamics of independent electrons are textbook knowledge, the inclusion of electronic correlations adds a new degree of complexity that can lead to new and unexpected macroscopic behaviour. Such novel phenomena are fundamentally interesting in their own right, but some can also be harnessed for device applications. Knowledge of the electronic structure of correlated materials is pivotal to explaining their unusual properties, and in my talk I will describe experiments that have established the Fermi surface and quantified the degree of band renormalisation of several correlated electron metals of recent interest. These showpiece examples include the possible p-wave superconductor Sr2RuO4, the metamagnetic heavy fermion compound CeRu2Si2, and Ag5Pb2O6 for which we recently found the most spherical Fermi surface ever seen in any superconductor. I will also describe how we plan to exploit recent technological advances – notably in silicon micromachining (MEMS) – to push the sensitivity limits under the very extreme conditions of the highest magnetic fields, very low temperatures, and high pressures.

This talk is part of the Quantum Matter Seminar series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Mott Seminar Room, Cavendish Laboratory, Department of Physics
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Quantum Matter Seminar
• School of Physical Sciences
• Thin Film Magnetic Talks

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