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Complete d-Band Dispersion and the Mobile Fermion Scale in NaxCoO2
D. Qian, L. Wray, D. Hsieh +6
We utilize fine-tuned polarization selection coupled with excitation-energy variation of photoelectron signal to image the \textit{complete d}-band dispersion relation in sodium co…
Optical Properties and Magnetic Field-Induced Phase Transitions in the Ferroelectric State of NiVO
R. C. Rai, J. Cao, S. Brown +7
We use a combination of optical spectra, first principles calculations, and energy dependent magneto-optical measurements to elucidate the electronic structure and to study the pha…
Complex magnetic order in the kagome staircase compound Co3V2O8
Y. Chen, J. W. Lynn, Q. Huang +9
Co3V2O8 (CVO) has a geometrically frustrated magnetic lattice, a Kagome staircase. The crystal structure consists of two inequivalent Co sites, one-dimensional chains of Co(2) spin…
Quasiparticle coherence and the nature of the metal-insulator phase transition in NaCoO
D. Qian, L. Wray, D. Hsieh +7
Layered cobaltates embody novel realizations of correlated quantum matter on a spin-1/2 triangular lattice. We report a high-resolution systematic photoemission study of the insula…
Low-lying electronic structure of doped triangular cobaltates
A. P. Kuprin, D. Qian, Y. -D. Chuang +3
We report detailed Fermi surface topology and quasiparticle dynamics of the host cobaltate Na0.7CoO2. A direct mapping of the Fermi surface is carried out by angle-resolved photoem…
Stuffed Rare Earth Pyrochlore Solid Solutions
G. C. Lau, B. D. Muegge, T. M. McQueen +2
Synthesis and crystal structures are described for the compounds Ln2(Ti2-xLnx)O7-x/2, where Ln = Tb, Dy, Ho, Er, Tm, Yb, Lu, and x ranges from 0 to 0.67. Rietveld refinements on X-…