Zener Tunneling Breakdown in Phase-Change Materials Revealed by Intense Terahertz Pulses

Yasuyuki Sanari, Takehiro Tachizaki, Yuta Saito, Kotaro Makino, Paul Fons, Alexander V. Kolobov, Junji Tominaga, Koichiro Tanaka, Yoshihiko Kanemitsu, Muneaki Hase, Hideki Hirori

研究成果: Article査読

13 被引用数 (Scopus)

抄録

We have systematically investigated the spatial and temporal dynamics of crystallization that occur in the phase-change material Ge2Sb2Te5 upon irradiation with an intense terahertz (THz) pulse. THz-pump-optical-probe spectroscopy revealed that Zener tunneling induces a nonlinear increase in the conductivity of the crystalline phase. This fact causes the large enhancement of electric field associated with the THz pulses only at the edge of the crystallized area. The electric field concentrating in this area causes a temperature increase via Joule heating, which in turn leads to nanometer-scale crystal growth parallel to the field and the formation of filamentary conductive domains across the sample.

本文言語English
論文番号165702
ジャーナルPhysical review letters
121
16
DOI
出版ステータスPublished - 2018 10 19
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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