The mixed-valent compound YbBaCo 4 O 7 is built up of Kagome´sheets of CoO 4 tetrahedra, linked in the third dimension by a triangular layer of CoO 4 tetrahedra in an analogous fashion to that found in the known geometrically frustrated magnets such as pyrochlores and SrCr 9x Ga 12À9x O 19 (SCGO). W
✦ LIBER ✦
Dirac structure, RVB, and Goldstone modes in the kagomé antiferromagnet
✍ Scribed by Hastings, M.
- Book ID
- 111915527
- Publisher
- The American Physical Society
- Year
- 2000
- Tongue
- English
- Weight
- 164 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1098-0121
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We present a detailed analysis of the density of photonic states of an electromagnetic wave propagating through photonic crystals with the symmetry of the kagome ´and pyrochlore lattices. The evolution of this quantity with varying dielectric constant contrast is studied with the aim of identifying