Formation of gapless Fermi arcs and fingerprints of order in the pseudogap state of cuprate superconductors
| Autor: | Ari Palczewski, Jinsheng Wen, Takeshi Kondo, Yoichiro Hamaya, Adam Kaminski, Z. J. Xu, Genda Gu, Tsunehiro Takeuchi |
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| Rok vydání: | 2013 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Superconductivity Condensed matter physics General Physics and Astronomy Order (ring theory) Fermi surface Position and momentum space Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Strongly correlated material Cuprate Pseudogap Fermi Gamma-ray Space Telescope |
| Zdroj: | Physical review letters. 111(15) |
| ISSN: | 1079-7114 |
| Popis: | We use angle-resolved photoemission spectroscopy and a new quantitative approach based on the partial density of states to study properties of seemingly disconnected portions of the Fermi surface (FS) that are present in the pseudogap state of cuprates called Fermi arcs. We find that the normal state FS collapses very abruptly into Fermi arcs at the pseudogap temperature (${T}^{*}$). Surprisingly, the length of the Fermi arcs remains constant over an extended temperature range between ${T}^{*}$ and ${T}_{\mathrm{pair}}$, consistent with the presence of an ordered state below ${T}^{*}$. These arcs collapse again at the temperature below which pair formation occurs (${T}_{\mathrm{pair}}$) either to a point or a very short arc, whose length is limited by our experimental resolution. The tips of the arcs span between points defining a set of wave vectors in momentum space, which are the fingerprints of the ordered state that causes the pseudogap. |
| Databáze: | OpenAIRE |
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