Imaging the coherent propagation of collective modes in the excitonic insulator candidate Ta$_2$NiSe$_5$ at room temperature

25 Mar 2020 • Andrich Paolo • Bretscher Hope M. • Murakami Yuta • Golež Denis • Remez Benjamin • Telang Prachi • Singh Anupam • Harnagea Luminita • Cooper Nigel R. • Millis Andrew J. • Werner Philipp • Sood A. K. • Rao Akshay

Excitonic insulating (EI) materials are predicted to host a condensate of electron-hole pairs in their ground state, giving rise to collective many-body effects. Although several bulk materials have been proposed as EIs recently, a direct observation of the characteristic collective behavior is still missing... (read more)

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Imaging the coherent propagation of collective modes in the excitonic insulator candidate Ta$_2$NiSe$_5$ at room temperature

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