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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2680
DTSTART:20120604T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T041057Z
LAST-MODIFIED:20120601T211101Z
LOCATION:5310 Chamberlin
SUMMARY:Magnetic Ordering of the Heisenberg J1 – J2 – J3 Model\, C
 ondensed Matter Theory Group Seminar\, Samuel Ducatman\, UW-Madison
DESCRIPTION:We calculated the ground state energies\, spin wave spectr
 um\, and investigated the stability of the diagonal double stripe and 
 orthogonal double stripe magnetic orderings of the J1 - J2 - J3 Heisen
 berg square lattice. We assumed a small J1 and J2 <2J3\, and analytica
 lly calculated the quantum corrections with a four sublattice model. B
 y investigating the spectrum around the goldstone point (π/2\, - π/2
 )\, we found that the diagonal double stripe phase is unstable. We als
 o considered how the orthogonal double stripe phase\, found to be stab
 le\, competes with spiral phase. We compared our results to previous s
 imulations and neutron scattering experiments of FeTe\, which is thoug
 ht to have a double stripe phase. 
URL:https://www.physics.wisc.edu/events/?id=2680
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