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Quasiparticles in the Pseudogap Phase of Underdoped Cuprate
Kai-Yu Yang, H. B. Yang, P. D. Johnson +2
Recent angle resolved photoemission \cite{yang-nature-08} and scanning tunneling microscopy \cite{kohsaka-nature-08} measurements on underdoped cuprates have yielded new spectrosco…
Theory for Superconductivity in Iron Pnictides at Large Coulomb U Limit
Wei-Qiang Chen, Kai-Yu Yang, Yi Zhou +1
Superconductivity in iron pnictides is studied by using a two-orbital Hubbard model in the large U limit. The Coulomb repulsion induces an orbital-dependent pairing between charge…
Nature of Stripes in the Generalized t-J Model Applied to The Cuprate Superconductors
Kai-Yu Yang, Wei-Qiang Chen, T. M. Rice +2
Recent transport properties on the stripe phase in LaBaCuO by Li \textit{et al.} found 2-dimensional superconductivity over a wide te…
Influence of the trap shape on the superfluid-Mott transition in ultracold atomic gases
Ping Nang Ma, Kai Yu Yang, Lode Pollet +3
The coexistence of superfluid and Mott insulator, due to the quadratic confinement potential in current optical lattice experiments, makes the accurate detection of the superfluid-…