This chapter is dedicated to the research activities performed on phase change nanowires (NWs) and their potentialities for phase change random access memory (PRAM or PCM) applications. In the first part, the various strategies for scaling down phase change materials to improve device performance are reviewed. Advantages and disadvantages of phase change NWs, top-down and bottom-up fabrication processes, characterization techniques and technological aspects are also discussed. Special focus is placed on the self-assembly of NWs by the vapor-liquid-solid mechanisms, including their compositional and structural analyses. In the second part, the key properties of NW phase change materials and how they affect device performance and reliability are reviewed. Crystallization kinetics, phase transitions, thermal and electrical properties, as well as the properties of core-shell structures, are discussed. Size effects, particularly in relation to scaling parameters, reduction of programming energy and drift resistance are further elaborated, as such effects can influence usefulness of phase change-based PCM devices in addition to discovery of unknown phenomena.

Longo, M. (2019). Advances in nanowire PCM. In Yoshio Nishi, Blanka Magyari-Kope (a cura di), Advances in Non-volatile Memory and Storage Technology (pp. 443-518). Woodhead Publishing ; Elsevier [10.1016/B978-0-08-102584-0.00013-9].

Advances in nanowire PCM

Longo, Massimo
2019-01-01

Abstract

This chapter is dedicated to the research activities performed on phase change nanowires (NWs) and their potentialities for phase change random access memory (PRAM or PCM) applications. In the first part, the various strategies for scaling down phase change materials to improve device performance are reviewed. Advantages and disadvantages of phase change NWs, top-down and bottom-up fabrication processes, characterization techniques and technological aspects are also discussed. Special focus is placed on the self-assembly of NWs by the vapor-liquid-solid mechanisms, including their compositional and structural analyses. In the second part, the key properties of NW phase change materials and how they affect device performance and reliability are reviewed. Crystallization kinetics, phase transitions, thermal and electrical properties, as well as the properties of core-shell structures, are discussed. Size effects, particularly in relation to scaling parameters, reduction of programming energy and drift resistance are further elaborated, as such effects can influence usefulness of phase change-based PCM devices in addition to discovery of unknown phenomena.
2019
Settore FIS/03
English
Rilevanza internazionale
Capitolo o saggio
Longo, M. (2019). Advances in nanowire PCM. In Yoshio Nishi, Blanka Magyari-Kope (a cura di), Advances in Non-volatile Memory and Storage Technology (pp. 443-518). Woodhead Publishing ; Elsevier [10.1016/B978-0-08-102584-0.00013-9].
Longo, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/348906
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