Conveners
wednesday afternoon
- Martin Gmitra
The emergence of 2D materials has transformed solid-state physics. The key factor driving research into 2D materials is the ability to efficiently control the atomic-scale physical properties of monolayers and their heterostructures, which involve weak yet important van der Waals interactions. Spintronics aims to utilize the spin of conduction electrons to develop devices like spin transistors...
The density matrix is a fundamental quantity of nonequilibrium quantum statistical mechanics, introduced in 1927 shortly after the birth of quantum physics by von Neumann and Landau, which allows us to compute observable quantities in spintronics like spin torque, spin densities, spin currents etc. However, debates have been raging in recent spintronic literature on how to construct density...
In recent years, the realization of magnetic long-range order in atomically thin 2D materials has shown a big potential in spintronic applications in ultrathin magnets due to the possibility of manipulation of magnetism by external fields, strain or proximity effects in van der Waals (vdW) heterostructures. Specifically, the family of 2D metallic magnets Fe$_n$GeTe$_2$ ($n=3, 4, 5$) has...
In the last decades, proximity effects in graphene-based van der Waals heterostructures have acquired significant attention for their high tunability [1]. Here we study current induced spin accumulation in graphene proximitized by monolayer of 1T-TaS$_{2}$. In such heterostructure, the proximity-induced spin-orbit coupling in the graphene is directly related to the correlated electronic states...
Spin-orbit torque (SOT) in van der Waals heterostructures offers a pathway to energy-efficient spintronic devices. The proximity of a transition-metal dichalcogenide to graphene can have a profound effect on the induced magnetism and spin texture of graphene. One of the promising materials for SOT research is 1T-TaS$_2$. A monolayer of 1T-TaS$_2$ comprises strong spin-orbit coupling, charge...
In commensurate twisted homobilayers, purely radial Rashba spin-orbit fields can emerge due to the interaction of the twisted hidden Rashba spin-orbit coupling (SOC) from each layer [1]. We calculate the band structures and the spin-orbit fields close to the high symmetry points $K$ and $\Gamma$ of commensurate twisted transition-metal dichalcogenide homobilayers (WSe$_2$ and NbSe$_2$) from...
We are investigating triangulene shaped substitutional defects in hexagonal boron nitride filled with carbon atoms. We show how the triangulene shaped defects encompass magnetic moments and with ab initio methods we build Heisenberg like classical spin models representing their interactions. We show how different lattice terminations and sizes impact the magnetic properties of the system.
