The structure of the stripes in Bi(2)Sr(2)CaCu(2)O(8+y) superconductor has been refined by polarized Cu K-edge extended X-ray absorption fine structure (EXAFS). The distribution of Cu-O (planar) distances range from 1.87 Angstrom to 1.96 Angstrom. The results show that the in-plane CuO(2) lattice distortions in the 1D modulation are large enough to form a potential barrier of width W between the stripes of undistorted CuO(2) lattice of width L = 15 +/- 0.5 Angstrom. The calculations show that the maximum of the density of states formed by the second subband is tuned to the Fermi level.
Tuning of the Fermi level at the second subband of a superlattice of quantum wires in the CuO2 plane: A possible mechanism to raise the critical temperature
Missori M;
1996
Abstract
The structure of the stripes in Bi(2)Sr(2)CaCu(2)O(8+y) superconductor has been refined by polarized Cu K-edge extended X-ray absorption fine structure (EXAFS). The distribution of Cu-O (planar) distances range from 1.87 Angstrom to 1.96 Angstrom. The results show that the in-plane CuO(2) lattice distortions in the 1D modulation are large enough to form a potential barrier of width W between the stripes of undistorted CuO(2) lattice of width L = 15 +/- 0.5 Angstrom. The calculations show that the maximum of the density of states formed by the second subband is tuned to the Fermi level.File in questo prodotto:
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