Coherent emission from surface Josephson plasmons in striped cuprates
<p>The interplay between charge order and superconductivity remains one of the central themes of research in quantum materials. In the case of cuprates, the coupling between striped charge fluctuations and local electromagnetic fields is especially important, as it affects transport properties...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
National Academy of Sciences
2022
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| _version_ | 1826310491985674240 |
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| author | Nicoletti, D Buzzi, M Fechner, M Dolgirev, PE Michael, MH Curtis, JB Demler, E Gu, GD Cavalleri, A |
| author_facet | Nicoletti, D Buzzi, M Fechner, M Dolgirev, PE Michael, MH Curtis, JB Demler, E Gu, GD Cavalleri, A |
| author_sort | Nicoletti, D |
| collection | OXFORD |
| description | <p>The interplay between charge order and superconductivity remains one of the central themes of research in quantum materials. In the case of cuprates, the coupling between striped charge fluctuations and local electromagnetic fields is especially important, as it affects transport properties, coherence, and dimensionality of superconducting correlations. Here, we study the emission of coherent terahertz radiation in single-layer cuprates of the La<sub>2-x</sub>Ba<sub>x</sub>CuO<sub>4</sub> family, for which this effect is expected to be forbidden by symmetry. We find that emission vanishes for compounds in which the stripes are quasi-static but is activated when c-axis inversion symmetry is broken by incommensurate or fluctuating charge stripes, such as in La<sub>1.905</sub>Ba<sub>0.095</sub>CuO<sub>4</sub> and in La<sub>1.845</sub>Ba<sub>0.155</sub>CuO<sub>4</sub>. In this case, terahertz radiation is emitted by surface Josephson plasmons, which are generally dark modes, but couple to free space electromagnetic radiation because of the stripe modulation.</p> |
| first_indexed | 2024-03-07T07:52:49Z |
| format | Journal article |
| id | oxford-uuid:4c6e797d-5a3f-439f-81d0-df0bdf77b2d1 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:52:49Z |
| publishDate | 2022 |
| publisher | National Academy of Sciences |
| record_format | dspace |
| spelling | oxford-uuid:4c6e797d-5a3f-439f-81d0-df0bdf77b2d12023-07-27T15:58:14ZCoherent emission from surface Josephson plasmons in striped cupratesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4c6e797d-5a3f-439f-81d0-df0bdf77b2d1EnglishSymplectic ElementsNational Academy of Sciences2022Nicoletti, DBuzzi, MFechner, MDolgirev, PEMichael, MHCurtis, JBDemler, EGu, GDCavalleri, A<p>The interplay between charge order and superconductivity remains one of the central themes of research in quantum materials. In the case of cuprates, the coupling between striped charge fluctuations and local electromagnetic fields is especially important, as it affects transport properties, coherence, and dimensionality of superconducting correlations. Here, we study the emission of coherent terahertz radiation in single-layer cuprates of the La<sub>2-x</sub>Ba<sub>x</sub>CuO<sub>4</sub> family, for which this effect is expected to be forbidden by symmetry. We find that emission vanishes for compounds in which the stripes are quasi-static but is activated when c-axis inversion symmetry is broken by incommensurate or fluctuating charge stripes, such as in La<sub>1.905</sub>Ba<sub>0.095</sub>CuO<sub>4</sub> and in La<sub>1.845</sub>Ba<sub>0.155</sub>CuO<sub>4</sub>. In this case, terahertz radiation is emitted by surface Josephson plasmons, which are generally dark modes, but couple to free space electromagnetic radiation because of the stripe modulation.</p> |
| spellingShingle | Nicoletti, D Buzzi, M Fechner, M Dolgirev, PE Michael, MH Curtis, JB Demler, E Gu, GD Cavalleri, A Coherent emission from surface Josephson plasmons in striped cuprates |
| title | Coherent emission from surface Josephson plasmons in striped cuprates |
| title_full | Coherent emission from surface Josephson plasmons in striped cuprates |
| title_fullStr | Coherent emission from surface Josephson plasmons in striped cuprates |
| title_full_unstemmed | Coherent emission from surface Josephson plasmons in striped cuprates |
| title_short | Coherent emission from surface Josephson plasmons in striped cuprates |
| title_sort | coherent emission from surface josephson plasmons in striped cuprates |
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