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Dynamic electron energy and momentum mapping for ultrafast intervalley relaxation in layered WSe2

Hiroya Yamaguchi, Keiko Kato, Hiroki Mashiko, Yoshiaki Sekine, Hiroki Hibino, Ikufumi Katayama, Jun Takeda, and Katsuya Oguri

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Abstract

Dynamical energy and momentum mapping for intervalley electron transfer in WSe2 was investigated with high-harmonic-based ultrafast ARPES. The measured ultrashort scattering time of 30 fs will provide a guide to lightwave control of valley pseudospin.

© 2020 The Author(s)

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