Oxygen isotope effect on electron dynamics in Bi2Sr2CaCu2O : angle-resolved photoemission spectroscopy
| Autor: | Shuyun Zhou, Jeff Graf, Suryadijaya, Gey-Hong Gweon, H. Takagi, Takao Sasagawa, Alessandra Lanzara |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Condensed matter physics Photoemission spectroscopy Phonon Doping Energy Engineering and Power Technology Angle-resolved photoemission spectroscopy Electronic structure Condensed Matter Physics Molecular physics Isotopes of oxygen Electronic Optical and Magnetic Materials Momentum Kinetic isotope effect Electrical and Electronic Engineering |
| Zdroj: | Physica C: Superconductivity. :436-440 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2004.12.023 |
| Popis: | In order to directly examine the impact of phonons in electronic structure, angle-resolved photoemission spectroscopy (ARPES) measurements have been performed on optimally doped Bi 2 Sr 2 CaCu 2 O y ( T c ∼ 92 K) upon oxygen isotope substitution. The obtained ARPES data show clear and giant changes induced by 16 O → 18 O exchange, which are found to be strongly energy, momentum dependent and effective only at low temperatures ( T T c ). This direct observation of unconventional electron–phonon interactions should urge reconsideration of the role of phonons in high- T c materials. |
| Databáze: | OpenAIRE |
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