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Title: Picosecond electric-field-induced threshold switching in phase-change materials [THz-induced threshold switching and crystallization of phase-change materials]

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [3];  [4];  [4];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [6];  [6];  [6];  [6];  [6];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); European XFEL, Schenefeld (Germany)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Stanford Univ., Stanford, CA (United States)
  6. RWTH Aachen Univ., Aachen (Germany)

Many chalcogenide glasses undergo a breakdown in electronic resistance above a critical field strength. Known as threshold switching, this mechanism enables field-induced crystallization in emerging phase-change memory. Purely electronic as well as crystal nucleation assisted models have been employed to explain the electronic breakdown. Here, picosecond electric pulses are used to excite amorphous Ag4In3Sb67Te26. Field-dependent reversible changes in conductivity and pulse-driven crystallization are observed. The present results show that threshold switching can take place within the electric pulse on subpicosecond time scales—faster than crystals can nucleate. As a result, this supports purely electronic models of threshold switching and reveals potential applications as an ultrafast electronic switch.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1341736
Alternate ID(s):
OSTI ID: 1283426
Journal Information:
Physical Review Letters, Vol. 117, Issue 6; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 50 works
Citation information provided by
Web of Science

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Cited By (11)

Dynamic Terahertz Plasmonics Enabled by Phase‐Change Materials journal August 2019
Direct Evidence for a Systematic Evolution of Optical Band Gap and Local Disorder in Ag, In Doped Sb 2 Te Phase Change Material journal October 2017
High‐Speed Bipolar Switching of Sputtered Ge–Te/Sb–Te Superlattice iPCM with Enhanced Cyclability journal April 2019
Designing crystallization in phase-change materials for universal memory and neuro-inspired computing journal January 2019
Significant Volume Expansion as a Precursor to Ablation and Micropattern Formation in Phase Change Material Induced by Intense Terahertz Pulses journal February 2018
Scanning microwave imaging of optically patterned Ge 2 Sb 2 Te 5 journal March 2019
First-principles prediction of the native filament:dielectric interfaces for the possible filamentary switching mechanism in chalcogenide selector devices journal January 2020
Threshold switching dynamics of pseudo-binary GeTe–Sb 2 Te 3 phase change memory devices journal July 2019
Sub-nanosecond threshold switching dynamics in GeSb 2 Te 4 phase change memory device journal October 2019
Reducing the stochasticity of crystal nucleation to enable subnanosecond memory writing journal November 2017
Tuning the ferro- to para-electric transition temperature and dipole orientation of group-IV monochalcogenide monolayers text January 2017

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