This video shows how we generate a metal at a semiconductor surface in 0.00000000000002 seconds - with laser light. It briefly explains the photodoping mechanism in photoinduced semiconductor-to-metal transitions and points out how we photoexcite a metal surface on a semiconducting ZnO crystal. Remarkably, this transient metal is not only excited on ultrafast femtosecond timescales (20 fs), it also decays rapidly. One reason for this is that the observed transition requires orders of magnitude lower photon fluxes than previous photoinduced phase transitions (PIPT). If you want to know more, for example understand the mechanism (involving photodoping, photoinduced surface band bending, defect exciton formation, Mott transition), read the complete story here:

[ Ссылка ]

Ultrafast generation and decay of a surface metal
Lukas Gierster, Sesha Vempati & Julia Stähler
Nature Communications 12, 978 (2021)


press release of the HU and FHI Berlin (English):
[ Ссылка ]



press release of the HU and FHI Berlin (German):
[ Ссылка ]


Your welcome to activate German/English subtitles :)
Das Video hat deutsche/englische Untertitel!

We acknowledge funding by the Deutsche Forschungs-
gemeinschaft (DFG, German Research Foundation) - Project-ID 182087777 - Sfb951.

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