RT info:eu-repo/semantics/article
T1 Attosecond state-resolved carrier motion in quantum materials probed by soft x-ray XANES
A1 Buades, Bárbara
A1 Picón, Antonio
A1 Berger, Emma
A1 León, Iker
A1 Di Palo, Nicola
A1 Cousin, Seth L.
A1 Cocchi, Caterina
A1 Pellegrin, Eric
A1 Herrero Martín, Javier
A1 Mañas-Valero, Samuel
A1 Coronado, Eugenio
A1 Danz, Thomas
A1 Draxl, Claudia
A1 Uemoto, Mitsuharu
A1 Yabana, Kazuhiro
A1 Schultze, Martin
A1 Wall, Simon
A1 Zürch, Michael
A1 Biegert, Jens
K1 Attosecond
K1 XANES
K1 Spectroscopy
K1 22 Física
K1 espectroscopia
AB Recent developments in attosecond technology led to table-top x-ray spectroscopy in the soft x-ray range, thus uniting the element- and state-specificity of core-level x-ray absorption spectroscopy with the time resolution to follow electronic dynamics in real-time. We describe recent work in attosecond technology and investigations into materials such as Si, SiO2, GaN, Al2O3, Ti, and TiO2, enabled by the convergence of these two capabilities. We showcase the state-of-the-art on isolated attosecond soft x-ray pulses for x-ray absorption near-edge spectroscopy to observe the 3d-state dynamics of the semi-metal TiS2 with attosecond resolution at the Ti L-edge (460 eV). We describe how the element- and state-specificity at the transition metal L-edge of the quantum material allows us to unambiguously identify how and where the optical field influences charge carriers. This precision elucidates that the Ti:3d conduction band states are efficiently photo-doped to a density of 1.9 × 1021 cm−3. The light-field induces coherent motion of intra-band carriers across 38% of the first Brillouin zone. Lastly, we describe the prospects with such unambiguous real-time observation of carrier dynamics in specific bonding or anti-bonding states and speculate that such capability will bring unprecedented opportunities toward an engineered approach for designer materials with pre-defined properties and efficiency. Examples are composites of semiconductors and insulators like Si, Ge, SiO2, GaN, BN, and quantum materials like graphene, transition metal dichalcogens, or high-Tc superconductors like NbN or LaBaCuO. Exiting are prospects to scrutinize canonical questions in multi-body physics, such as whether the electrons or lattice trigger phase transitions.
PB American Institute of Physics
SN 1931-9401
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/81534
UL https://uvadoc.uva.es/handle/10324/81534
LA eng
NO Appl. Phys. Rev. 2021, 8, 011408
DS UVaDOC
RD 14-ene-2026