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Anisotropic softening of collective charge modes in the vicinity of critical doping in a doped Mott insulator
Y. W. Li, D. Qian, L. Wray +9
Momentum resolved inelastic resonant x-ray scattering is used to map the evolution of charge excitations over a large range of energies, momenta and doping levels in the electron d…
Semimetal to semimetal charge density wave transition in 1T-TiSe
G. Li, W. Z. Hu, D. Qian +5
We report an infrared study on 1-TiSe, the parent compound of the newly discovered superconductor CuTiSe. Previous studies of this compound have not conclusively res…
Charge collective modes in an incommensurately modulated cuprate
L. Wray, D. Qian, D. Hsieh +3
We report the first measurement of collective charge modes of insulating Sr14Cu24O41 using inelastic resonant x-ray scattering over the complete Brillouin zone. Our results show th…
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…
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…