[Host: Despina Louca]
The parent compound of La1-xSrxCoO3 has a non-magnetic, Mott insulating ground state. As temperature is increased, the parent undergoes a non-magnetic to paramagnetic (PM) transition, and with hole-doping, static ferromagnetic (FM) correlations develop. The mechanisms by which the PM and FM states emerge from the non-magnetic state will be discussed with reference to our neutron scattering measurements. In the PM state, dynamic FM and antiferromagnetic (AFM) correlations likely result from the super-exchange interactions in a dynamically orbitally ordered state. With doping, static isotropic FM droplets are formed due to double exchange, and the FM correlation length increases with hole concentration.
Condensed Matter Seminar
Thursday, February 2, 2006
Physics Building, Room 204
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