Search Results for author: Q. He

Found 1 papers, 0 papers with code

Tunneling-tip-induced collapse of the charge gap in the excitonic insulator Ta$_2$NiSe$_5$

no code implementations15 Dec 2020 Q. He, X. Que, L. Zhou, M. Isobe, D. Huang, H. Takagi

The layered chalcogenide Ta$_2$NiSe$_5$ has been recently discussed as such an excitonic insulator with an excitation gap of ~250 meV below $T_c$ = 328 K. Here, we demonstrate a drastic collapse of the excitation gap in Ta$_2$NiSe$_5$ and the realization of a zero-gap state by moving the tip of a cryogenic scanning tunneling microscope towards the sample surface by a few angstroms.

Strongly Correlated Electrons Mesoscale and Nanoscale Physics

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