Dynamics of Charge-Density-Wave puddles in 2$H$-NbSe$_2$
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866912942547533824 |
|---|---|
| author | Kumbhakar, Shreya Esposito, Marina M, Anjan Kumar N Confalone, Tommaso Feng, Liwen Alam, Rafiqul Sardo, Flavia Lo Masarotti, Davide Tafuri, Francesco Böhm, Thomas Abdel-Hafiez, Mahmoud Chandra, Sushmita Felser, Claudia Nielsch, Kornelius Poccia, Nicola Kaiser, Stefan Haider, Golam |
| author_facet | Kumbhakar, Shreya Esposito, Marina M, Anjan Kumar N Confalone, Tommaso Feng, Liwen Alam, Rafiqul Sardo, Flavia Lo Masarotti, Davide Tafuri, Francesco Böhm, Thomas Abdel-Hafiez, Mahmoud Chandra, Sushmita Felser, Claudia Nielsch, Kornelius Poccia, Nicola Kaiser, Stefan Haider, Golam |
| contents | Electronic phases in quantum materials are often governed by nanoscale inhomogeneity, where local order develops within spatially confined regions or puddles. A prominent example is an incommensurate charge-density-wave (I-CDW) that comprises locally commensurate domains. In 2$H$-NbSe$_2$, such an I-CDW state persists alongside lattice anharmonicity and superconductivity, raising fundamental questions about the dynamical stabilization of CDW order in puddles. Here, we probe the puddle-dynamics in 2$H$-NbSe$_2$. Raman scattering reveals a strong Fano-coupling between the interlayer shear vibration and the CDW amplitude mode. Time-resolved reflectivity measurement shows a low-frequency ~0.15 THz coherent overdamped oscillation onsetting within the CDW regime at ~17 K, pointing towards a so far unexplored transition. This we identify as a Fano-coupled phonon-CDW hybrid emerging from the collective dynamics of CDW puddles. These dynamics highlight how lattice pinning and electronic correlations in layered materials affect the CDW order, which is crucial for the design of novel Van der Waals devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03980 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dynamics of Charge-Density-Wave puddles in 2$H$-NbSe$_2$ Kumbhakar, Shreya Esposito, Marina M, Anjan Kumar N Confalone, Tommaso Feng, Liwen Alam, Rafiqul Sardo, Flavia Lo Masarotti, Davide Tafuri, Francesco Böhm, Thomas Abdel-Hafiez, Mahmoud Chandra, Sushmita Felser, Claudia Nielsch, Kornelius Poccia, Nicola Kaiser, Stefan Haider, Golam Strongly Correlated Electrons Mesoscale and Nanoscale Physics Superconductivity Electronic phases in quantum materials are often governed by nanoscale inhomogeneity, where local order develops within spatially confined regions or puddles. A prominent example is an incommensurate charge-density-wave (I-CDW) that comprises locally commensurate domains. In 2$H$-NbSe$_2$, such an I-CDW state persists alongside lattice anharmonicity and superconductivity, raising fundamental questions about the dynamical stabilization of CDW order in puddles. Here, we probe the puddle-dynamics in 2$H$-NbSe$_2$. Raman scattering reveals a strong Fano-coupling between the interlayer shear vibration and the CDW amplitude mode. Time-resolved reflectivity measurement shows a low-frequency ~0.15 THz coherent overdamped oscillation onsetting within the CDW regime at ~17 K, pointing towards a so far unexplored transition. This we identify as a Fano-coupled phonon-CDW hybrid emerging from the collective dynamics of CDW puddles. These dynamics highlight how lattice pinning and electronic correlations in layered materials affect the CDW order, which is crucial for the design of novel Van der Waals devices. |
| title | Dynamics of Charge-Density-Wave puddles in 2$H$-NbSe$_2$ |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2603.03980 |