Revisiting the Local Structure in Ge-Sb-Te based Chalcogenide Superlattices

被引：64

作者：

Casarin, Barbara ^{[1
,2
]}

Caretta, Antonio ^{[2
]}

Momand, Jamo ^{[3
]}

Kooi, Bart J. ^{[3
]}

Verheijen, Marcel A. ^{[4
]}

Bragaglia, Valeria ^{[5
]}

Calarco, Raffaella ^{[5
]}

Chukalina, Marina ^{[6
]}

Yu, Xiaoming ^{[7
]}

Robertson, John ^{[7
]}

Lange, Felix R. L. ^{[8
]}

Wuttig, Matthias ^{[8
]}

Redaelli, Andrea ^{[9
]}

Varesi, Enrico ^{[9
]}

Parmigiani, Fulvio ^{[1
,2
,10
]}

Malvestuto, Marco ^{[2
]}

机构：

[1] Univ Trieste, Via A Valerio 2, I-34127 Trieste, Italy

[2] Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163-5 AREA Sci Pk, I-34149 Trieste, Italy

[3] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

[4] Eindhoven Univ Technol, Dept Appl Phys, POB 513 5600, NL-5600 MB Eindhoven, Netherlands

[5] Paul Drude Inst Festkorperelekt, Hausvogteipl 5-7, D-10117 Berlin, Germany

[6] Russian Acad Sci, Inst Microelect Technol & High Pur Mat, Moscow, Russia

[7] Univ Cambridge, Engn Dept, Cambridge CB2 1PZ, England

[8] Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany

[9] Micron Semicond Italia Srl, Via C Olivetti 2, I-20864 Agrate Brianza, MB, Italy

[10] Univ Cologne, Int Fac, D-50937 Cologne, Germany

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

关键词：

PHASE-CHANGE MATERIALS; BONDED MATERIALS;

D O I：

10.1038/srep22353

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The technological success of phase-change materials in the field of data storage and functional systems stems from their distinctive electronic and structural peculiarities on the nanoscale. Recently, superlattice structures have been demonstrated to dramatically improve the optical and electrical performances of these chalcogenide based phase-change materials. In this perspective, unravelling the atomistic structure that originates the improvements in switching time and switching energy is paramount in order to design nanoscale structures with even enhanced functional properties. This study reveals a high-resolution atomistic insight of the [GeTe/Sb2Te3] interfacial structure by means of Extended X-Ray Absorption Fine Structure spectroscopy and Transmission Electron Microscopy. Based on our results we propose a consistent novel structure for this kind of chalcogenide superlattices.

引用

页数：8

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