School of Physical and Chemical Sciences, Te Kura Matū Seminar Series

Scanning Probe Microscopy of Spintronic Materials

Speaker

Maxime Le Ster, PhD Candidate

Institute

School of Physical and Chemical Sciences, UC

Time & Place

Mon, 02 Sep 2019 11:00:00 NZST in 701, Level 7, West Building

All are welcome

Abstract

Spintronics are a key technology in the development of future electronic devices. As a consequence, the demand of new materials that allow manipulation of the electron spin has rapidly increased over the last decade. However many challenges remain in the different condensed-matter systems that are available for future applications.

Two classes of promising materials are investigated in this talk: group-V elemental two-dimensional (2D) materials which possess topologically non-trivial band-structures, and rare-earth nitrides (RENs) which are intrinsic ferromagnetic semiconductors.

First, the moiré patterns (MPs) in multi-layered group-V 2D materials are investigated by scanning tunneling microscopy (STM). Two geometrical models to explain the MPs are presented and compared with the experimental results. Secondly, because of the rapid oxidation that the RENs films undergo in ambient atmosphere, a removable capping layer technique using a samarium is presented. The method opens up avenues for surface characterisation of RENs surfaces, and could help in addressing the remaining questions regarding these materials.