Atomic-layer controlled THz Spintronic emission from Epitaxially grown Two dimensional PtSe$_2$/ferromagnet heterostructures
Year: 2023
Type: preprint
Abstract: Terahertz (THz) Spintronic emitters based on ferromagnetic/metal junctions have become an important technology for the THz range, offering powerful and ultra-large spectral bandwidths. These developments have driven recent investigations of two-dimensional (2D) materials for new THz spintronic concepts. 2D materials, such as transition metal dichalcogenides (TMDs), are ideal platforms for SCC as they possess strong spin-orbit coupling (SOC) and reduced crystal symmetries. Moreover, SCC and the resulting THz emission can be tuned with the number of layers, electric field or strain. Here, epitaxially grown 1T-PtSe$_2$ and sputtered Ferromagnet (FM) heterostructures are presented as a novel THz emitter where the 1T crystal symmetry and strong SOC favor SCC. High quality of as-grown PtSe$_2$ layers is demonstrated and further FM deposition leaves the PtSe$_2$ unaffected, as evidenced with extensive characterization. Through this atomic growth control, the unique thickness dependent electronic structure of PtSe$_2$ allows the control of the THz emission by SCC. Indeed, we demonstrate the transition from the inverse Rashba-Edelstein effect in one monolayer to the inverse spin Hall effect in multilayers. This band structure flexibility makes PtSe$_2$ an ideal candidate as a THz spintronic 2D material and to explore the underlying mechanisms and engineering of the SCC for THz emission.
Source: arXiv (Cornell University)
Authors: Abdukayumov, K., Mičica, M., Ibrahim, F., Vergnaud, C., Marty, A., Veuillen, J. -Y., Mallet, P., de Moraes, I. Gomes, Dosenovic, D., Wright, A., Tignon, J., Mangeney, J., Ouerghi, A., Renard, V., Mesple, F., Bonell, F., Okuno, H., Chshiev, M., George, J. -M., Jaffrès, H., Dhillon, S., Jamet, M.
Institutions: Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Institut de Recherche Interdisciplinaire de Grenoble, Spintronique et Technologie des Composants, Université Grenoble Alpes, Institut Néel, École Normale Supérieure - PSL, Laboratoire de Physique de l'Ecole Normale Supérieure, Laboratoire Modélisation et Exploration des Matériaux, Université Paris-Saclay, Centre de Nanosciences et de Nanotechnologies, Laboratoire Albert Fert, Laboratoire d'Électronique des Technologies de l'Information, Institut Universitaire de France
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Extreme Optical Nonlinearities in 2D materials for Far-Infrared Photonics, Two-dimensional magnetic materials, G2115222242, G2563643918, G434337789, G4656594441, Artificial permittivity and permeability engineering for future generation sub wavelength analogue integrated circuits and systems, Graphene Flagship Core Project 3, G6199966231, G7240651115, MAGnetism InduCed VALLEY polarization in large scale 2D materials, Electrical control of magnetization in fully epitaxial van der Waals heterostructures, Laboratory of Alliances on Nanosciences - Energy for the Future
OpenAlex ID: W4376312457