S. Mathias (Avtor), S. Eich (Avtor), Jurij Urbančič (Avtor), S. Michael (Avtor), A. V. Carr (Avtor), S. Emmerich (Avtor), A. Stange (Avtor), T. Popmintchev (Avtor), T. Rohwer (Avtor), M. Wiesenmayer (Avtor)

Povzetek

Capturing the dynamic electronic band structure of a correlated material presents a powerful capability for uncovering the complex couplings between the electronic and structural degrees of freedom. When combined with ultrafast laser excitation, new phases of matter can result, since far-from-equilibrium excited states are instantaneously populated. Here, we elucidate a general relation between ultrafast non-equilibrium electron dynamics and the size of the characteristic energy gap in a correlated electron material. We show that carrier multiplication via impact ionization can be one of the most important processes in a gapped material, and that the speed of carrier multiplication critically depends on the size of the energy gap. In the case of the charge-density wave material 1T-TiSe 2 , our data indicate that carrier multiplication and gap dynamics mutually amplify each other, which explains—on a microscopic level—the extremely fast response of this material to ultrafast optical excitation. Self-amplified photo-induced gap quenching in a correlated electron material. Available from: https://www.researchgate.net/publication/308804379_Self-amplified_photo-induced_gap_quenching_in_a_correlated_electron_material [accessed Apr 20, 2017].

Ključne besede

high harmonic generation;charge-density wave materials;non-equilibrium electron dynamics;ultrafast surface science;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UNG - Univerza v Novi Gorici
UDK: 53
COBISS: 4770043 Povezava se bo odprla v novem oknu
ISSN: 2041-1723
Št. ogledov: 4720
Št. prenosov: 0
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

URN: URN:SI:UNG
Vrsta dela (COBISS): Delo ni kategorizirano
Strani: str. 1-8
Zvezek: ǂVol. ǂ7
Čas izdaje: Oct. 2016
DOI: 10.1038/ncomms12902
ID: 9603396