Point nodes persisting far beyond Tc in Bi2212
書誌事項
- 公開日
- 2015-07-09
- 資源種別
- journal article
- 権利情報
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- https://creativecommons.org/licenses/by/4.0
- https://creativecommons.org/licenses/by/4.0
- DOI
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- 10.1038/ncomms8699
- 10.48550/arxiv.1507.04312
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>Abstract</jats:title><jats:p>In contrast to a complex feature of antinodal state, suffering from competing orders, the pairing gap of cuprates is obtained in the nodal region, which therefore holds the key to the superconducting mechanism. One of the biggest question is whether the point nodal state as a hallmark of <jats:italic>d</jats:italic>-wave pairing collapses at <jats:italic>T</jats:italic><jats:sub>c</jats:sub> like the BCS-type superconductors, or it instead survives above <jats:italic>T</jats:italic><jats:sub>c</jats:sub> turning into the preformed pair state. A difficulty in this issue comes from the small magnitude of the nodal gap, which has been preventing experimentalists from solving it. Here we use a laser ARPES capable of ultrahigh-energy resolution, and detect the point nodes surviving far beyond <jats:italic>T</jats:italic><jats:sub>c</jats:sub> in Bi2212. By tracking the temperature evolution of spectra, we reveal that the superconductivity occurs when the pair-breaking rate is suppressed smaller than the single-particle scattering rate on cooling, which governs the value of <jats:italic>T</jats:italic><jats:sub>c</jats:sub> in cuprates.</jats:p>
収録刊行物
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- Nature Communications
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Nature Communications 6 (1), 7699-, 2015-07-09
Springer Science and Business Media LLC
