Apr 24 – 30, 2022
Ettore Majorana Foundation and Centre for Scientific Culture
Europe/Rome timezone

Session

P. Hakonen

Apr 27, 2022, 9:00 AM
Ettore Majorana Foundation and Centre for Scientific Culture

Ettore Majorana Foundation and Centre for Scientific Culture

Via Gian Filippo Guarnotti, 26, 91016 Erice TP (Italy)

Description

Abstract:
In these lectures, I will start by a brief review on fundamental transport phenomena in 2D materials, with the aim to outline the basic noise processes involved. I will give a brief overview of experimental results on graphene and MoS2 and discuss how their low-frequency noise spectra can be analyzed. Graphene and MoS2 can be viewed as archetype materials for 1/f noise phenomena in 2D semimetals and 2D semiconductors, respectively, and the presented concepts can be carried over to other equivalent materials. Furthermore, I will review results on suspended graphene devices which provide the lowest 1/f noise. Due to the low noise, suspended graphene provides a good test bed for studies of intrinsic and extrinsic noise sources, which facilitates fundamental tests of 1/f noise theories. Finally, 1/f noise in topological materials and in superconductor-graphene-superconductor junctions with proximity-induced supercurrent will be discussed.

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