Events at Physics |
Events on Friday, October 21st, 2011
- Cosmology Journal Club
- An Informal discussion about a broad variety of arXiv papers related to Cosmology
- Time: 12:00 pm
- Place: 5242 Chamberlin Hall
- Abstract: Please visit the following link for more details:
http://cmb.physics.wisc.edu/journal/index.html
Please feel free to bring your lunch!
If you have questions or comments about this journal club, would like to propose a topic or volunteer to introduce a paper, please email Le Zhang (lzhang263@wisc.edu) - Host: Peter Timbie
- Physics Department Colloquium
- The Kondo effect: from magnetic alloys to nanoelectronics
- Time: 3:30 pm
- Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
- Speaker: Peter Wölfle, Karlsruhe Institute of Technology, Germany
- Abstract: After introducing the problem and some historical remarks I show how the Kondo effect may be understood as a collective many-body effect, present whenever a local degree of freedom (spin) is coupled to a continuum of excitations. A comparison with selected experiments serves to highlight the essence of the Kondo effect. Then the Kondo effect in quantum dots is introduced and salient features are reviewed. It is shown how the theory needs to be modified to account for nonequilibrium transport through Kondo dots. Examples of how the Kondo effect is suppressed and how it may be created by finite bias voltage are shown. Finally the role of the Kondo effect in creating "heavy electron metals" is described and the fascinating physics of quantum phase transitions in these compounds is highlighted.
- Host: Chubukov