Reflections - Abstract - Tomas Wagner

Nanoscale Memories in Chalcogenide Glass Films.
Tomas Wagner^1*, Bo Zhang¹, Silvie Valkova¹, Max Fraenkl¹, Milos Krbal¹, Miloslav Frumar¹, G. Chen²

A range of material systems exists in which nanoscale ionic transport and redox reactions provide the essential for switching as platform for reconfigurable electronic devices and biological like computing. One class relies on mobile cations, which are easily created by electrochemical oxidation of the corresponding electrode metal, transported in the insulating layer, and reduced at the inert counter electrode. These devices are termed electrochemical metallization memories (EMC) or conductive bridge random access memories [1]. The material candidates for electrolytes in such devides have been recently studied. They are amorphous chalcogenides [2, 3] and also oxides (SiO₂, WO₃, TiO₂ and others [1]) containing metal elements (Ag, Cu) or their compounds (Ag₂S, CuS) and gaining some portion of ionic conductivity and becoming mixed ionic-electronic conductors [3-8].

The aim of this work is to present our current results on syntesis and resistive switching of chalcogenide based nanowire array cells and planparalel cells.

The authors thank project KONTAKT II (CR-USA) LH14059 for financial support.

Literature:

[1] W. Lu, D. S. Jeong, M. Kozicki, R. Waser, MRS Bulletin, 37 (2012) 124.

[2] M. Frumar and T. Wagner, Curr. Opinion Solid St. Mat. Sci. 7 (2003) 117.

[3] M. Frumar, B. Frumarova, T. Wágner, Amorphous and Glassy Semiconducting Chalcogenides. In: Bhattacharya P, Fornari R, and Kamimura H, (eds.), Comprehensive Semiconductor Science and Technology, volume 4, pp. 206-261 (2011)Amsterdam: Elsevier.

[4] S. Stehlík, J. Kolár, M. Bartos, Mil.Vlcek, M. Frumar, V. Zima, T. Wágner, Sol. State Ionics 181, (2010) 1625.

[5] J. Kolár, T. Wágner, V. Zima, S. Stehlík, B. Frumarová, L. Benes, Mil. Vlcek, M. Frumar, J. Non-Cryst. Solids, 357 (2011) 2223.

[6] I. Kaban, P. Jóvári, T. Wágner, M. Bartos, M. Frumar, B. Beuneu, W. Hoyer, N. Mattern, J., Eckert, J. Non-Cryst. Solids, 357 (2011) 3430.

[7] S. Stehlik, K. Shimakawa, T. Wágner, M. Frumar, J. Phys. D: Appl. Phys. 45 (2012) 205304.

[8] Kolar J., Macak J., Terabe K., Wágner T, Down-scaling of resistive switching to nanoscale using porous anodic alumina membranes, J. Mater. Chem. C 2 (2014) 349-355.

Institutions:

1 Department of General and Inorganic Chemistry, Faculty of Chemical Technology, and Centre for Materials Science, University of Pardubice, Cs. Legion's Sq. 565, Pardubice 532 10, Czech Republic.

2 Department. of Physics & Astronomy, Athens, USA