Heavy quasiparticles in Yb compounds: The Renormalized Band approach

Add to your list(s) Download to your calendar using vCal

• Dr Gertrud Zwicknagl, TU Braunschweig
• Thursday 14 February 2013, 14:15-15:15
• TCM Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Gareth Conduit.

Results for the dispersion of “heavy” 4f-derived quasiparticles in Yb-based compounds are presented. The bands are determined by means of the Renormalized Band method. The topology of the Fermi surface differs from the one predicted by standard band structure calculations based on Density Functional Theory. This is in marked contrast to the situation encountered in Ce-based Heavy Fermion Systems where standard band structure calculation usually provide reliable models for the Fermi surface. Calculations of the magnetic-field-induced changes of the heavy quasiparticles in YbRh2Si2 are presented. The progressive de-renormalization of the quasiparticles in the magnetic field is accounted for using field-dependent quasiparticle parameters deduced from Numerical Renormalization Group studies. The results are related to recent measurements of thermodynamic and transport properties.

This talk is part of the Theory of Condensed Matter series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Combined TCM Seminars and TCM blackboard seminar listing
• Featured lists
• Lennard-Jones Centre
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• PMRFPS's
• School of Physical Sciences
• TCM Seminar Room, Cavendish Laboratory
• Theory of Condensed Matter
• Thin Film Magnetic Talks

Note that ex-directory lists are not shown.