Events Calendar

Seminar: Strain engineering in 2D materials: towards strain tunable optoelectronic devices
Tuesday, 23. April 2019, 12:00
Contact Andrés Castellanos-Gómez

On April 23rd we will have a seminar by Andrés Castellanos-Gómez, from the Institute of Materials Science of Madrid, ICMM-CSIC

Strain engineering is an interesting strategy to tune a material’s electronic properties by subjecting its lattice to a mechanical deformation. Conventional straining approaches, used for 3D materials (including epitaxial growth on a substrate with a lattice parameter miss-match, the use of a dielectric capping layer or heavy ions implantation) are typically limited to strains lower than 2% in most cases due to the low maximum strains sustained by brittle bulk semiconducting materials. Bulk silicon, for example, can be strained only up to 1.5% before breaking. Moreover, these straining approaches induce static deformations of the semiconductor materials and therefore they are not suitable for tunable functional devices.

2D materials can be literally stretched, folded, bent or even pierced [1]. This outstanding stretchability (and the possibility of using dynamically varying strain) of 2D materials promises to revolutionize the field of strain engineering and could lead to "straintronic" devices – devices with electronic and optical properties that are engineered through the introduction of mechanical deformations.

In this talk I will discuss our recent efforts to study strain engineering in 2D materials and to exploit it to fabricate strain tunable functional optoelectronic devices [2-6].

References

[1] R Roldán et al. Journal of Physics: Condensed Matter (2015) 27 (31), 313201

[2] A Castellanos-Gomez, et al. Nano letters (2013) 13 (11), 5361-5366

[3] J Quereda, et al. Nano letters (2016) 16 (5), 2931-2937

[4] JO Island, et al. Nanoscale (2016) 8 (5), 2589-2593

[5] R Schmidt et al. 2D Materials (2016) 3 (2), 021011

[6] R Frisenda, et al. npj 2D Materials and Applications (2017) 1 (1), 10

 

Fecha del seminario: 23/04/2019 12:00

Lugar del seminario: Salón de Actos del Instituto de Química Física Rocasolano

Ponente del seminario: Andrés Castellanos-Gómez

Abstract

Location Salón de Actos del IQFR

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