Photo-Induced Tellurium Segregation in MoTe2

Takumi Fukuda, Ryota Kaburauchi, Yuta Saito, Kotaro Makino, Paul Fons, Keiji Ueno, Muneaki Hase

研究成果: Article査読

抄録

Herein, coherent phonon spectroscopy of polymorphic (Formula presented.) single crystals using a femtosecond-pulsed laser is used to investigate the relationship between structural phase transitions and photo-thermal effects induced by high-density laser excitation. Even when a femtosecond-pulsed laser is used, which generally induces fewer heat accumulation effects than the case for a continuous-wave (CW) laser, tellurium segregation is observed in coherent phonon spectra with increasing excitation density, while no structural phase transition among the polymorphs of (Formula presented.) is observed. The use of higher photon-energy excitation, however, is found to suppress tellurium segregation.

本文言語English
ジャーナルPhysica Status Solidi - Rapid Research Letters
DOI
出版ステータスAccepted/In press - 2022

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学

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