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Confined crystals of the smallest phase-change material.

Giusca, CE, Stolojan, V, Sloan, J, Börrnert, F, Shiozawa, H, Sader, K, Rümmeli, MH, Büchner, B and Silva, SR (2013) Confined crystals of the smallest phase-change material. Nano Lett, 13 (9). pp. 4020-4027.

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Abstract

The demand for high-density memory in tandem with limitations imposed by the minimum feature size of current storage devices has created a need for new materials that can store information in smaller volumes than currently possible. Successfully employed in commercial optical data storage products, phase-change materials, that can reversibly and rapidly change from an amorphous phase to a crystalline phase when subject to heating or cooling have been identified for the development of the next generation electronic memories. There are limitations to the miniaturization of these devices due to current synthesis and theoretical considerations that place a lower limit of 2 nm on the minimum bit size, below which the material does not transform in the structural phase. We show here that by using carbon nanotubes of less than 2 nm diameter as templates phase-change nanowires confined to their smallest conceivable scale are obtained. Contrary to previous experimental evidence and theoretical expectations, the nanowires are found to crystallize at this scale and display amorphous-to-crystalline phase changes, fulfilling an important prerequisite of a memory element. We show evidence for the smallest phase-change material, extending thus the size limit to explore phase-change memory devices at extreme scales.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Authors :
AuthorsEmailORCID
Giusca, CEUNSPECIFIEDUNSPECIFIED
Stolojan, VUNSPECIFIEDUNSPECIFIED
Sloan, JUNSPECIFIEDUNSPECIFIED
Börrnert, FUNSPECIFIEDUNSPECIFIED
Shiozawa, HUNSPECIFIEDUNSPECIFIED
Sader, KUNSPECIFIEDUNSPECIFIED
Rümmeli, MHUNSPECIFIEDUNSPECIFIED
Büchner, BUNSPECIFIEDUNSPECIFIED
Silva, SRUNSPECIFIEDUNSPECIFIED
Date : 11 September 2013
Identification Number : 10.1021/nl4010354
Related URLs :
Additional Information : This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher.To access the final edited and published work see http://dx.doi.org/10.1021/nl4010354.
Depositing User : Symplectic Elements
Date Deposited : 08 Oct 2013 16:00
Last Modified : 11 Sep 2014 01:08
URI: http://epubs.surrey.ac.uk/id/eprint/804080

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