Interfacial systems displaying Rashba spin-orbit coupling (SOC) such as SrTiO3-based 2-dimensional electron gases (2DEGs) may be used to realize spin-charge interconversion with great efficiency (through the direct and inverse Edelstein effects), and as such be used as sources and detectors of spin currents1. Another consequence of their broken inversion symmetry is their nonreciprocal transport phenomena2, such as unidirectional magnetoresistance that has been observed in SrTiO33,4 and KTaO35 2DEGs and is often coined bilinear since it depends linearly on both the current and the external magnetic field. Endowing oxide 2DEGs with additional functionalities such as ferroic orders enriches their transport response from the coupling/competition between e.g. ferromagnetism and superconductivity or ferromagnetism and ferroelectricity. Here, we will focus on the interesting interplay that may arise between the Rashba-type SOC ferromagnetism in 2DEGs that qualify as Rashba ferromagnets6, that have been little investigated. In particular, we will discuss how magnetism can strongly enhance the spin-charge interconversion efficiency7 and yield spontaneous non-reciprocal transport, in the absence of external magnetic field. We will also describe the various ferromagnetic signatures of the 2DEG in magnetotransport and their distinct gate dependence.
Wann? | 02.04.2025 16:45 |
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Wo? | PER 08 0.51 Chemin du Musée 3, 1700 Fribourg |
Vortragende | Speaker: Dr. Manuel Bibes
Université Paris-Saclay, France Invited by group Monney |
Kontakt | Département de Physique Prof. Claude Monney Claude.monney@unifr.ch Chemin du Musée 3 1700 Fribourg 0263009113 |