Thermal Hall conductivity in the cuprate Mott insulators Nd$_2$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$
| Autor: | Etienne Lefrancois, Andréanne Allaire, Adrien Gourgout, Maxime Dion, Louis Taillefer, Ruixing Liang, Gael Grissonnanche, Sven Badoux, D. A. Bonn, Marie-Eve Boulanger, Walter Hardy, Xianhui Chen, Anaëlle Legros, Can Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Electronic properties and materials
Phonon High Energy Physics::Lattice Science Thermal Hall effect General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Superconducting properties and materials Superconductivity (cond-mat.supr-con) Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons Condensed Matter::Superconductivity 0103 physical sciences Cuprate 010306 general physics lcsh:Science Physics Multidisciplinary Condensed matter physics Spins Strongly Correlated Electrons (cond-mat.str-el) Scattering Mott insulator Condensed Matter - Superconductivity General Chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 3. Good health Magnetic field lcsh:Q Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Chirality (chemistry) |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020) Nature Communications |
| Popis: | The heat carriers responsible for the unexpectedly large thermal Hall conductivity of the cuprate Mott insulator La$_2$CuO$_4$ were recently shown to be phonons. However, the mechanism by which phonons in cuprates acquire chirality in a magnetic field is still unknown. Here, we report a similar thermal Hall conductivity in two cuprate Mott insulators with significantly different crystal structures and magnetic orders - Nd$_2$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$ - and show that two potential mechanisms can be excluded - the scattering of phonons by rare-earth impurities and by structural domains. Our comparative study further reveals that orthorhombicity, apical oxygens, the tilting of oxygen octahedra and the canting of spins out of the CuO$_2$ planes are not essential to the mechanism of chirality. Our findings point to a chiral mechanism coming from a coupling of acoustic phonons to the intrinsic excitations of the CuO$_2$ planes. 29 pages, 8 figures |
| Databáze: | OpenAIRE |
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