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One-Dimensional Electronic Structure and Suppression of d-Wave Node State in (La(1.28)Nd(0.6)Sr(0.12))CuO(4)
1Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA. Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, CA 94720, USA. Department of Superconductivity, University of Tokyo, Yayoi 2-11-16, Bunkyo-ku, Tokyo 133, Japan.
Science (New York, N.Y.)
|October 9, 1999
Summary
Angle-resolved photoemission spectroscopy reveals that the stripe phase in (La(1.28)Nd(0.6) Sr(0.12))CuO(4) exhibits a suppressed low-energy excitation and a 1D-like Fermi surface, deviating from 2D band calculations.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Cuprates exhibit complex electronic phases, including charge- and spin-ordered stripe phases.
- Understanding these phases is crucial for elucidating high-temperature superconductivity mechanisms.
Purpose of the Study:
- To investigate the electronic structure of the stripe phase in (La(1.28)Nd(0.6) Sr(0.12))CuO(4) using angle-resolved photoemission spectroscopy.
- To characterize the deviation of the Fermi surface from predictions of standard band theory.
Main Methods:
- Angle-resolved photoemission spectroscopy (ARPES) was employed.
- The electronic structure and spectral weight distribution were analyzed in momentum space.
Main Results:
- A suppression of low-energy excitations was observed near the expected d-wave node region.
- The frequency-integrated spectral weight showed confinement to one-dimensional segments in momentum space.
- This 1D-like electronic structure deviates significantly from the 2D Fermi surface predicted by band calculations and persists to high energies.
Conclusions:
- The study provides critical experimental data on the electronic structure of the stripe phase in cuprates.
- These findings offer essential insights for theoretical models aiming to explain charge/spin ordering and its link to superconductivity in these materials.
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