Dependence of switching characteristics of GeTe/Sb2Te 3 superlattice phase change materials on electric pulse width and optical polarization direction

Toshimichi Shintani, Toshiharu Saiki

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The recording mode of a GeTe/Sb2Te3 superlattice phase change material (GeTeSL) was studied electrically and optically. In the electrical studies, the RESET current decreased when the pulse width was shortened, while the RESET voltage was almost equal for any pulse width considered. Optical studies using femtosecond laser pulses revealed that the reduction of the RESET power in GeTeSL was not observed with the z-polarized laser light, while it was observed with the xy-polarized laser light. Accordingly, it has been proposed that the reduction in the RESET power of GeTeSL is achieved by the in-plane electric field instead of thermal recording.

Original languageEnglish
Article number111401
JournalApplied Physics Express
Volume6
Issue number11
DOIs
Publication statusPublished - 2013 Nov

Fingerprint

electric pulses
phase change materials
optical polarization
Phase change materials
Light polarization
pulse duration
Lasers
polarization
Ultrashort pulses
recording
lasers
Laser pulses
Electric fields
Electric potential
electric fields
electric potential
pulses
Hot Temperature

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "The recording mode of a GeTe/Sb2Te3 superlattice phase change material (GeTeSL) was studied electrically and optically. In the electrical studies, the RESET current decreased when the pulse width was shortened, while the RESET voltage was almost equal for any pulse width considered. Optical studies using femtosecond laser pulses revealed that the reduction of the RESET power in GeTeSL was not observed with the z-polarized laser light, while it was observed with the xy-polarized laser light. Accordingly, it has been proposed that the reduction in the RESET power of GeTeSL is achieved by the in-plane electric field instead of thermal recording.",
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AU - Saiki, Toshiharu

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AB - The recording mode of a GeTe/Sb2Te3 superlattice phase change material (GeTeSL) was studied electrically and optically. In the electrical studies, the RESET current decreased when the pulse width was shortened, while the RESET voltage was almost equal for any pulse width considered. Optical studies using femtosecond laser pulses revealed that the reduction of the RESET power in GeTeSL was not observed with the z-polarized laser light, while it was observed with the xy-polarized laser light. Accordingly, it has been proposed that the reduction in the RESET power of GeTeSL is achieved by the in-plane electric field instead of thermal recording.

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