Dec. 6, 2018
(past)
4:10 p.m.
to 5 p.m.
60 St.George Street MP 102
Emilia Morosan
Rice University
Itinerant
and local moment magnetism have substantively different origins, and
require distinct theoretical treatment. A unified theory of magnetism
has long been sought after, and remains elusive, mainly due to the
limited number of known itinerant magnetic systems. In the case of the
two such examples discovered six decades ago, the itinerant ferromagnets
ZrZn
2
and Sc
3
In,
the understanding of their magnetic ground states draws on the
existence of delocalized 3d electrons subject to strong spin
fluctuations. Here I will present the properties of the
recently-discovered itinerant antiferromagnetic metal with no magnetic
constituents, TiAu, and the quantum critical behavior unveiled by
doping.
I
will contrast this with the effects of both electron doping and
pressure. This new IAFM challenges the currently limited understanding
of weak itinerant antiferromagnetism, while providing long sought-after
insights into the effects of spin fluctuations in itinerant electron
systems.