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Extremely High Contrast Multi‐Level Resistance States of In 3 SbTe 2 Device for High Density Non‐Volatile Memory Applications
Author(s) -
Pandey Shivendra K.,
Manivannan Anbarasu
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201700227
Subject(s) - crystallization , materials science , amorphous solid , phase change memory , ranging , optoelectronics , trap (plumbing) , thermal conduction , resistive random access memory , high resistance , set (abstract data type) , resistive touchscreen , computer science , nanotechnology , electrical engineering , chemical engineering , physics , crystallography , voltage , composite material , engineering , chemistry , telecommunications , agronomy , programming language , layer (electronics) , meteorology , computer vision , biology
Current‐controlled promotion of crystallization offers stable multi‐level resistances after threshold switching process which are being exploited for multi‐bit phase change memory applications. In this paper, ultra‐high contrast multi‐level resistance characteristics of In 3 SbTe 2 device is demonstrated by the means of systematically varying the current‐controlled crystallization process for a wide range of currents starting from few μA to 40 μA and the corresponding resistance levels ranging from 10 MΩ to 10 kΩ, respectively. Also, the conduction process in the amorphous phase and the stability of multiple resistance levels have been analyzed using trap‐limited sub‐threshold electrical transport models, and the effective crystalline thicknesses of various resistance states were estimated. Furthermore, a systematic increment of programming current unfolds more than eight discrete stable resistive states with a remarkably larger programming margin (∼570 times) between amorphous and crystalline ( set ) state revealing the extraordinary multi‐bit programming capabilities of In 3 SbTe 2 device for high‐density data storage applications.