تقرير
Phonon renormalization effects accompanying the 6 K anomaly in the Quantum Spin Liquid Candidate $\kappa$-(BEDT-TTF)$_{2}$Cu$_{2}$(CN)$_{3}$
| العنوان: | Phonon renormalization effects accompanying the 6 K anomaly in the Quantum Spin Liquid Candidate $\kappa$-(BEDT-TTF)$_{2}$Cu$_{2}$(CN)$_{3}$ |
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| المؤلفون: | Matsuura, Masato, Sasaki, Takahiko, Naka, Makoto, Müller, Jens, Stockert, Oliver, Piovano, Andrea, Yoneyama, Naoki, Lang, Michael |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The low-temperature state of the quantum spin liquid candidate $\kappa$-(BEDT-TTF)$_{2}$Cu$_{2}$(CN)$_{3}$ emerges via an anomaly at $T^{*}\sim6$ K. Although signatures of this anomaly have been revealed in various quantities, its origin has remained unclear. Here we report inelastic neutron scattering measurements on single crystals of $\kappa$-(BEDT-TTF)$_{2}$Cu$_{2}$(CN)$_{3}$, aiming at studying phonon renormalization effects at $T^{*}$. A drastic change was observed in the phonon damping across $T^{*}$ for a breathing mode of BEDT-TTF dimers at $E=4.7$ meV. The abrupt change in the phonon damping is attributed to a phase transition into a valence bond solid state based on an effective model describing the spin-charge coupling in this dimer-Mott system. Comment: 5 pages, 3 figures, supplemental materials (8 pages, 6 figures) |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2208.05096 |
| رقم الأكسشن: | edsarx.2208.05096 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |