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Atomic-Scale Sources and Mechanism of Nanoscale Electronic Disorder in Bi2Sr2CaCu2O8+
K. McElroy,1,2Jinho Lee,1J. A. Slezak,1D.-H. Lee,2H. Eisaki,3S. Uchida,4J. C. Davis1*
The randomness of dopant atom distributions in cuprate high–criticaltemperature superconductors has long been suspected to causenanoscale electronic disorder. In the superconductor Bi2Sr2CaCu2O8+,we identified populations of atomic-scale impurity states whosespatial densities follow closely those of the oxygen dopantatoms. We found that the impurity-state locations are stronglycorrelated with all manifestations of the nanoscale electronicdisorder. This disorder occurs via an unanticipated mechanismexhibiting high-energy spectral weight shifts, with associatedstrong superconducting coherence peak suppression but very weakscattering of low-energy quasi-particles.
1 Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14850, USA. 2 Department of Physics, University of California, Berkeley, CA 94720, USA. 3 National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Central 2, Umezono, Tsukuba, Ibaraki 305-8568, Japan. 4 Department of Physics, University of Tokyo, Tokyo 113-8656, Japan.
* To whom correspondence should be addressed. E-mail: jcdavis{at}ccmr.cornell.edu
Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+{delta}.
A. N. Pasupathy, A. Pushp, K. K. Gomes, C. V. Parker, J. Wen, Z. Xu, G. Gu, S. Ono, Y. Ando, and A. Yazdani (2008)
Science
320, 196-201
|Abstract »|Full Text »|PDF »
From the Cover: Imaging the impact on cuprate superconductivity of varying the interatomic distances within individual crystal unit cells.
J. A. Slezak, J. Lee, M. Wang, K. McElroy, K. Fujita, B. M. Andersen, P. J. Hirschfeld, H. Eisaki, S. Uchida, and J. C. Davis (2008)
PNAS
105, 3203-3208
|Abstract »|Full Text »|PDF »
, we identified populations of atomic-scale impurity states whose spatial densities follow closely those of the oxygen dopant atoms. We found that the impurity-state locations are strongly correlated with all manifestations of the nanoscale electronic disorder. This disorder occurs via an unanticipated mechanism exhibiting high-energy spectral weight shifts, with associated strong superconducting coherence peak suppression but very weak scattering of low-energy quasi-particles. 
