Geometrically frustrated magnets - Department of Theoretical Physics

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Materials Pyrochlore Kagome Triangular Hagemann et al., PRL 86, 894 (2001). Arnab Sen, TIFR Geometrically frustrated magnets
Interesting questions Spin liquids Description of the system when there is no magnetic ordering? Is the physics trivial? Signatures/probes of such correlated phases? Sensitivity How can degeneracy be split? Can unusual states be obtained in this way? ’Quenching’ of leading exchange interactions allow new physics to happen. Arnab Sen, TIFR Geometrically frustrated magnets
Page 1 and 2: Geometrically frustrated magnets Ar
Page 3 and 4: Superexchange interaction Consider
Page 5 and 6: Frustration Not all the interaction
Page 7: Schematic of magnetic susceptibilit
Page 11 and 12: Macroscopic degeneracy II Zero mode
Page 13 and 14: Quantum fluctuations Quantum fluctu
Page 15 and 16: Single-ion anisotropy Motion of the
Page 17 and 18: Zero field To O(J 3 /D 2 ), H eff i
Page 19 and 20: No minority rule H D = 2J 2 ∑P n2
Page 21 and 22: Triangular Lattice Arnab Sen, TIFR
Page 23 and 24: Orientationally ordered state 0 −
Page 25 and 26: Consequences (I) 0 q x π 2 π 2 π
Page 27 and 28: Kagome in magnetic field Include ma
Page 29 and 30: Sublattice symmetry broken a) c) 0
Page 31 and 32: Summary S > 3/2 kagome and triangul

Geometrically frustrated magnets - Department of Theoretical Physics

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