Surgical manipulation of collective modes in novel materials
Event details
| Date | 30.01.2017 |
| Hour | 16:15 › 17:15 |
| Speaker |
Prof. Fabrizio Carbone, Laboratory for Ultrafast Microscopy and Electron Scattering, SB, EPFL Bio: Master degree: University of Pavia "optoelectronic engineering". September 2001. Reasearch scientist at Pirelli Labs, Milan Italy between September 2000 and August 2002. PhD in condensed matter physics from the University of Geneva, prof. van der Marel gorup. January 2007 Post doc in physical chemistry at Caltech in prof. Zewail`s group. March 2007-April 2009 |
| Location | |
| Category | Conferences - Seminars |
Inherent properties such as low-dimensionality, strong electron-electron correlations, topological protection, and/or nano-fabrication, multilayer stacking and self-assembly are the fundamental ingredients of materials displaying novel electronic, optical, and mechanical properties.
Microscopically, these phenomena are often ruled by ordered textures of spins and charges and their concerted motions. Key to understand and manipulate these states of matter is the ability to act on specific degrees of freedom externally while being able to monitor at the atomic level in space and time the consequences.
In this seminar, I will review the activity of our group in the last few years with a particular focus on ultrafast transmission electron microscopy. This approach is based on the selective fast manipulation of structural and/or electronic degrees of freedom followed by a real time monitoring of a solid via a combination of time-resolved diffraction, spectroscopy and imaging.
We will show the ability to manipulate the charge density distribution in a 2D metallic film and the electronic temperature in a single nanowire with fs-nm combined precision.
We will also demonstrate that magnetic skyrmions, a topologically protected whirling distribution of spins, can be manipulated by light and imaged in real-space with few nm resolution.
The implications of these results and the perspectives of these techniques will be also discussed.
Microscopically, these phenomena are often ruled by ordered textures of spins and charges and their concerted motions. Key to understand and manipulate these states of matter is the ability to act on specific degrees of freedom externally while being able to monitor at the atomic level in space and time the consequences.
In this seminar, I will review the activity of our group in the last few years with a particular focus on ultrafast transmission electron microscopy. This approach is based on the selective fast manipulation of structural and/or electronic degrees of freedom followed by a real time monitoring of a solid via a combination of time-resolved diffraction, spectroscopy and imaging.
We will show the ability to manipulate the charge density distribution in a 2D metallic film and the electronic temperature in a single nanowire with fs-nm combined precision.
We will also demonstrate that magnetic skyrmions, a topologically protected whirling distribution of spins, can be manipulated by light and imaged in real-space with few nm resolution.
The implications of these results and the perspectives of these techniques will be also discussed.
Practical information
- Expert
- Free
- This event is internal
Organizer
- Prof. Benoit Deveaud, Institute of Physics
Contact
- Blandine Jérôme