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[期刊论文]

In situ TEM revealing pretreatment and interface effects in Ge2Sb2Te5

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Author:

Shao, Ruiwen (Shao, Ruiwen.) | Wang, Lihua (Wang, Lihua.) (Scholars:王立华) | Dong, Weikang (Dong, Weikang.) | Unfold

Indexed by:

SCIE

Abstract:

Random access memory devices that rely on phase changes are primarily limited by the speed of crystallization. However, imaging structural dynamics in working devices with nanoscale resolution remains elusive. Using an ultrafast liquid-quenching system in transmission electron microscope, we obtain a melt-quenched amorphous phase-change material Ge2Sb2Te5 nanosheet. We find that the applied incubation field (pretreatment) leads to nonuniform nucleus formation and growth in the amorphous Ge2Sb2Te5, accompanied by a slight change in electric properties. Moreover, the phase-change mechanism changes from the material inherent crystallization mechanism (nucleation-dominated) to the heterocrystallization mechanism, indicating the incubation period of nucleation might be bypassed.

Author Community:

  • [ 1 ] [Shao, Ruiwen]Beijing Inst Technol, Inst Convergence Med & Engn, Beijing Adv Innovat Ctr Intelligent Robots & Syst, Beijing 100081, Peoples R China
  • [ 2 ] [Dong, Weikang]Beijing Inst Technol, Inst Convergence Med & Engn, Beijing Adv Innovat Ctr Intelligent Robots & Syst, Beijing 100081, Peoples R China
  • [ 3 ] [Wang, Lihua]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 4 ] [Zheng, Kun]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 5 ] [Han, Xiaodong]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 6 ] [Dong, Weikang]Beijing Inst Technol, Anal & Testing Ctr, Beijing 100081, Peoples R China
  • [ 7 ] [Yao, Lixin]North Univ China, Coll Mechatron Engn, Taiyuan 038507, Peoples R China
  • [ 8 ] [Chen, Yongjin]Ctr High Pressure Sci & Technol Adv Res, Beijing 100094, Peoples R China
  • [ 9 ] [Dong, Lixin]City Univ Hong Kong, Dept Biomed Engn, Kowloon Tong, Tat Chee Ave, Hong Kong, Peoples R China

Reprint Author's Address:

  • 郑坤 韩晓东

    [Zheng, Kun]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China;;[Han, Xiaodong]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China

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Source :

APPLIED PHYSICS LETTERS

ISSN: 0003-6951

Year: 2020

Issue: 22

Volume: 116

4 . 0 0 0

JCR@2022

ESI Discipline: PHYSICS;

ESI HC Threshold:100

Cited Count:

WoS CC Cited Count: 5

30 Days PV: 1

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