- universality (details such as crystal and chemical structures often don't matter)
- some similar physics in organic charge transfer salts and transition metal oxides and heavy fermion compounds
- Kondo physics is even relevant in systems without magnetic impurities!
- Dynamical mean-field captures the crossover from a Fermi liquid (and existence of quasi-particles) to a bad metal at high temperatures.
- But, "low" and "high" are relative (high temperature could be above 20 K!)
- Optical conductivity is a powerful probe to see the destruction of quasi-particles and effects of strong correlations
Wednesday, October 28, 2009
Ubiquitious spin and correlation physics
Today I am giving a talk at the conference. Here is the latest version of the talk. Although it is mostly based on this PRL, I hope I can bring out some of the common physics and issues with a much broader range of systems. A few take home points
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Superconductivity: a poster child for emergence
Superconductivity beautifully illustrates the characteristics of emergent properties. Novelty. Distinct properties of the superconducting s...
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Is it something to do with breakdown of the Born-Oppenheimer approximation? In molecular spectroscopy you occasionally hear this term thro... -
I welcome discussion on this point. I don't think it is as sensitive or as important a topic as the author order on papers. With rega...
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If you look on the arXiv and in Nature journals there is a continuing stream of people claiming to observe superconductivity in some new mat...
Is there a clear review of Landau's theory somewhere? (I understand Landau himself might be a thick read...)
ReplyDeleteA nice introduction without too much technical detail is
ReplyDeleteNon-Fermi liquids.
A. J. Schofield;
Contemporary Physics 40, 95 (1999).
http://www.informaworld.com/smpp/content~db=all?content=10.1080/001075199181602
Don't be put of by the title - he talk's about Fermi liquids before talking about non-Fermi liquids