Raman and ARPES combined study on the connection between the existence of the pseudogap and the topology of the Fermi surface in Bi2Sr2CaCu2O8+δ
| Autor: | Alain Sacuto, B. Loret, Timur K. Kim, Alexei V. Fedorov, John Schneeloch, S. V. Borisenko, Genda Gu, Ruidan Zhong, Yann Gallais, Maximilien Cazayous |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Superconductivity Photoemission spectroscopy Fermi surface Angle-resolved photoemission spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology Antibonding molecular orbital Topology 01 natural sciences symbols.namesake Condensed Matter::Superconductivity 0103 physical sciences symbols Condensed Matter::Strongly Correlated Electrons Connection (algebraic framework) 010306 general physics 0210 nano-technology Pseudogap Raman spectroscopy |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.174521 |
| Popis: | We study the behavior of the pseudogap in overdoped ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ by electronic Raman scattering (ERS) and angle-resolved photoemission spectroscopy (ARPES) on the same single crystals. Using both techniques we find that, unlike the superconducting gap, the pseudogap related to the antibonding band vanishes above the critical doping ${p}_{c}=0.22$. Concomitantly, we show from ARPES measurements that the Fermi surface of the antibonding band is holelike below ${p}_{c}$ and becomes electronlike above ${p}_{c}$. This reveals that the existence of the pseudogap depends on the Fermi surface topology in ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$, and more generally, puts strong constraint on theories of the pseudogap phase. |
| Databáze: | OpenAIRE |
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