Ultrafast nonresonant valleytronics in semiconductors and 2D materials
Public support
Provider
Czech Science Foundation
Programme
Standard projects
Call for proposals
SGA0202600001
Main participants
Univerzita Karlova / Matematicko-fyzikální fakulta
Contest type
VS - Public tender
Contract ID
26-21965S
Alternative language
Project name in Czech
Ultrafast nonresonant valleytronics in semiconductors and 2D materials
Annotation in Czech
The valley degree of freedom of electrons in bulk and low-dimensional semiconductors with multiple energy-degenerate conduction band minima is one of the promising candidates to replace electron charge in new generation of faster and more energy-efficient information technologies. The ultimate goal of this project is to develop novel ultrafast optical methods for controlling and detecting the valley polarization of electrons in bulk indirect semiconductors (Si, diamond, 3C-SiC, Ge), semiconductor quantum wells (Si), 2D crystals (hBN, transition metal dichalcogenides) and their heterostructures with sub-picosecond time resolution. These nonlinear optical methods will be applied to lift the energy degeneracy of inequivalent valleys and to directly measure the relaxation of valley polarization of electrons. We will study both theoretically and experimentally the role of many-body phenomena, temperature, defects, and crystal surface in the valley physics. If successful, the project will bring the concept of valleytronics closer to its real applications.
Scientific branches
R&D category
ZV - Basic research
OECD FORD - main branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
OECD FORD - secondary branch
10306 - Optics (including laser optics and quantum optics)
OECD FORD - another secondary branch
21001 - Nano-materials (production and properties)
CEP - equivalent branches <br>(according to the <a href="http://www.vyzkum.cz/storage/att/E6EF7938F0E854BAE520AC119FB22E8D/Prevodnik_oboru_Frascati.pdf">converter</a>)
BH - Optics, masers and lasers<br>BM - Solid-state physics and magnetism<br>JJ - Other materials
Solution timeline
Realization period - beginning
Jan 1, 2026
Realization period - end
Dec 31, 2028
Project status
Z - Beginning multi-year project
Latest support payment
—
Data delivery to CEP
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data delivery code
CEP26-GA0-GA-R
Data delivery date
Apr 27, 2026
Finance
Total approved costs
12,515 thou. CZK
Public financial support
11,477 thou. CZK
Other public sources
1,038 thou. CZK
Non public and foreign sources
0 thou. CZK