Optics and Magnetism of Quantum Materials
Announcement: TIMES
We are happy to announce the TIMES doctoral network
TEAM
Leader: Alejandro Molina-Sánchez
Institute of Materials Science at the University of Valencia
Research
Physics of excitons
Excitons are fundamentals to understand the light-matter interaction in semiconductors. The diverse and rich excitonic physics is responsible of phenomena of energy conversion, photon emitters, or quantum optics devices. In 2D materials, excitons are especially relevant, with large binding energies, resulting in fascinating many-body correlated phenomena. Our group works with ab initio computational methods to explore excited-state properties of quantum materials.
Phonons in 2D Materials
In 2011 I started to investigate 2D Materials. My first work studied phonons in single-layer and bulk MoS2. Often, properties of 2D materials behave in a counter-intuitive way with respect to their bulk counterparts.
Raman Spectroscopy
I collaborate in this nice work of Henrique Miranda in ab initio calculations of Raman spectroscopy in 2D materials. The calculations include the excitonic effects in the Raman response.
Exciton-Phonon Coupling
I had the luck of being part of the work of Fulvio Paleari in phonon-assisted absorption/emission spectra in Boron Nitride. Boron nitride has a strong luminescence in the UV range and an indirect bandgap.
Magnons in 2D Materials
Magnetic order in 2D materials opens new functionalities in functional materials with applications in spintronics or quantum computing. Magnons or spin-waves, spin excitations, dominate the magnetic response of two-dimensional crystals. Our research focus on developing ab initio methods to calculate magnons and magnon dynamics in 2D materials. We are also interested in the coupling of optical and magnetic properties, magnetic proximity effects on the exciton properties and the opto-magnetic properties of hybrid 2D material heterostructures.
Magnons in 2D Materials
Ultrafast Dynamics
Ultrafast dynamics of matter is at the core of applications like magnetic writing and reading or solar cells efficiency. In the framework of out of equilibrium many-body theory, we study the phenomena arising from the optical excitation by means of ultra-short laser pulses of electrons and excitons and the resulting out-of-equilibrium dynamics. We focus valley-spin dynamics and exciton dynamics in 2D materials. We are also working on the development of ab initio methods to simulate correlated electron-ion dynamics.
Magenetism in 2D materials
The existence of magnetism in 2D materials open the opportunity of investigating fundamental questions of condensed matter physics.
Ultrafast Spectroscopy
In this work, we have applied ab initio methods, together with non-equilibrium Green’s function theory to perform simulations of ultrafast spectroscopy in transition metal dichalcogenides.
Ultrafast Spectroscopy
Latest publications
Time-dependent screening explains the ultrafast excitonic signals rise in 2D semiconductors
Out-of-plane trion emission in monolayer WSe2 revealed by whispering gallery modes of dielectric microresonators
Electronic and magnetic properties of VOCl/FeOCl antiferromagnetic heterobilayers
Contact
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Institute of Materials Science (ICMUV)
University of Valencia
Catedratico Beltran 2
46980 Paterna (Valencia), Spain - alejandro.molina@uv.es
- +34 9635 44857