Electronic structure of CuO{sub 2} planes: From insulator to superconductor
- Institut de Physique Appliquee, Ecole Politechnique Federale, Lausanne (Switzerland)
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
Using angle-resolved photoemission and linearly polarized synchrotron radiation, we measured the electronic band structure of electronic states of CuO{sub 2} plane materials ranging from insulators (Sr{sub 2}CuO{sub 2}Cl{sub 2}) to overdoped superconductors (Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x}). We report three results: (i) The CuO{sub 2} containing insulator possesses a spin-density-wave (SDW) ground state; (ii) there are precursors of the SDW state for underdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x}; (iii) an extended saddle-point-type van Hove singularity is neither a necessary nor a sufficient condition for a high superconducting transition temperature, T{sub c}. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 531845
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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