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Destruction of antinodal state coherence via `checkerboard' charge ordering in strongly underdoped superconducting BSCCO-2212
K. McElroy, D. -H. Lee, J. E. Hoffman +6
Microscopy (STM). At all dopings, the low energy density-of-states modulations are analyzed according to a simple model of quasiparticle interference and found to be consistent wit…
Homogenous nodal superconductivity coexisting with inhomogeneous charge order in strongly underdoped Bi-2212
K. McElroy, D. -H. Lee, J. E. Hoffman +6
We use novel STM techniques in concert to study the doping dependence of electronic structure in Bi-2212. At all dopings, the low energy states are relatively homogenous except for…
Decoherence in Josephson Qubits from Junction Resonances
R. W. Simmonds, K. M. Lang, D. A. Hite +2
Although Josephson junction qubits show great promise for quantum computing, the origin of dominant decoherence mechanisms remains unknown. We report Rabi oscillations for an impro…
Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+d
J. E. Hoffman, K. McElroy, D. -H. Lee +4
Scanning tunneling spectroscopy of the high-Tc superconductor Bi2Sr2CaCu2O8+d reveals weak, incommensurate, spatial modulations in the tunneling conductance. Images of these energy…
A Four-Unit-Cell Periodic Pattern of Quasiparticle States Surrounding Vortex Cores in Bi2Sr2CaCu2O8+d
J. E. Hoffman, E. W. Hudson, K. M. Lang +4
Scanning tunneling microscopy is used to image the additional quasiparticle states generated by quantized vortices in the high-Tc superconductor Bi2Sr2CaCu2O8+d. They exhibit a Cu-…
Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
S. H. Pan, J. P. ONeal, R. L. Badzey +11
The parent compounds of the copper oxide high-Tc superconductors are unusual insulators. Superconductivity arises when they are properly doped away from stoichiometry1. In Bi2Sr2Ca…