تقرير
Giant resonant enhancement for photo-induced superconductivity in K$_3$C$_{60}$
| العنوان: | Giant resonant enhancement for photo-induced superconductivity in K$_3$C$_{60}$ |
|---|---|
| المؤلفون: | Rowe, E., Yuan, B., Buzzi, M., Jotzu, G., Zhu, Y., Fechner, M., Först, M., Liu, B., Pontiroli, D., Riccò, M., Cavalleri, A. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Photo-excitation at terahertz and mid-infrared frequencies has emerged as a new way to manipulate functionalities in quantum materials, in some cases creating non-equilibrium phases that have no equilibrium analogue. In K$_3$C$_{60}$, a metastable zero-resistance phase was documented with optical properties and pressure dependences compatible with non-equilibrium high temperature superconductivity. Here, we report the discovery of a dominant energy scale for this phenomenon, along with the demonstration of a giant increase in photo-susceptibility near 10 THz excitation frequency. At these drive frequencies a metastable superconducting-like phase is observed up to room temperature for fluences as low as ~400 $\mu J/cm^2$. These findings shed light on the microscopic mechanism underlying photo-induced superconductivity. They also trace a path towards steady state operation, currently limited by the availability of a suitable high-repetition rate optical source at these frequencies. Comment: 35 pages, 13 figures, including supplementary |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2301.08633 |
| رقم الأكسشن: | edsarx.2301.08633 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |