Low energy excitations in NbFe2 and the instability of ferromagnetic quantum critical points

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

• Dr. Philipp Niklowitz, Royal Holloway
• Friday 06 December 2013, 13:45-15:00
• Physics East 217.

If you have a question about this talk, please contact Elizabeth Blackburn.

Many experimental and theoretical studies suggest that ferromagnetic quantum criticality is difficult to reach. Instead, a variety of escape routes have been observed, notably the occurrence of a first order transition or superconductivity. The bulk properties in the normal state of the C14 Laves phase NbFe2 suggest a third scenario. Thermodynamic and transport measurements show marginal Fermi liquid behaviour as expected of a ferromagnetic quantum critical point. However, the quantum critical point in NbFe2 appears to be masked by an ordered state of unknown origin. The most likely candidate for the ordered state has been spin density wave order. We have done neutron scattering studies of NbFe2 single crystals in order to investigate how a magnetic quantum critical point is avoided in NbFe2.

This talk is part of the Condensed Matter Physics Seminars series.

This talk is included in these lists:

• Bham Talks
• Cond. Mat. seminar
• Condensed Matter Physics Seminars
• Physics East 217
• What's on in Physics?

Note that ex-directory lists are not shown.