Session Y41: Strongly Correlated Systems - Theory
8:00 AM–11:00 AM, Friday, March 19, 2010
Room: F152
Sponsoring Unit:
DCMP
Chair: Eun-Ah Kim, Cornell University
Abstract ID: BAPS.2010.MAR.Y41.8
Abstract: Y41.00008 : Spin conservation and Fermi liquid near a ferromagnetic quantum critical point
9:24 AM–9:36 AM
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Abstract 
Authors:
Andrey Chubukov
(University of Wisconsin)
Maslov Dmitrii
(University of Florida)
We propose a new low-energy theory for itinerant fermions near a ferromagnetic quantum critical point. We show that the full low-energy model includes, in addition to conventional interaction via spin fluctuations, another type of interaction, whose presence is crucial for the theory to satisfy SU(2) spin conservation. We demonstrate the consistency between a loop-wise expansion and a Fermi liquid description for the full model. We further show that, prior to the ferromagnetic instability, the system develops a Pomeranchuk-type instability into a state with zero magnetization but with p-wave deformations of the Fermi surfaces of spin-up and -down electrons (a spin nematic).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.Y41.8