Abstract
The nanometer scale lattice deformation brought about by the dopants in the high temperature superconducting cuprate La2−xSrxCuO4 (x ¼ 0.08) was investigated by measuring the associated x-ray diffuse scattering around multiple Bragg peaks. A characteristic diffuse scattering pattern was observed,
which can be well described by continuum elastic theory. With the fitted dipole force parameters, the acoustic-type lattice deformation pattern was reconstructed and found to be of similar size to lattice thermal vibration at 7 K. Our results address the long-term concern of dopant introduced local lattice
inhomogeneity, and show that the associated nanometer scale lattice deformation is marginal and cannot, alone, be responsible for the patched variation in the spectral gaps observed with scanning tunneling
microscopy in the cuprates.
which can be well described by continuum elastic theory. With the fitted dipole force parameters, the acoustic-type lattice deformation pattern was reconstructed and found to be of similar size to lattice thermal vibration at 7 K. Our results address the long-term concern of dopant introduced local lattice
inhomogeneity, and show that the associated nanometer scale lattice deformation is marginal and cannot, alone, be responsible for the patched variation in the spectral gaps observed with scanning tunneling
microscopy in the cuprates.
| Original language | English |
|---|---|
| Article number | 197001 |
| Journal | Physical Review Letters |
| Volume | 120 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 11 May 2018 |