Proximity-Driven Enhanced Magnetic Order at Ferromagnetic-Insulator-Magnetic-Topological-Insulator Interface.

Structural and proximity-induced ferromagnetic properties of topological insulator-magnetic insulator heterostructures

Direct measurement of proximity-induced magnetism at the interface between a topological insulator and a ferromagnet

When a topological insulator (TI) is in contact with a ferromagnet, both time-reversal and inversion symmetries are broken at the interface. An energy gap is formed at the TI surface, and its electrons gain a net magnetic moment through short-range exchange interactions. Magnetic TIs can host various exotic quantum phenomena, such as massive Dirac fermions, Majorana fermions, the quantum anomal...

Perovskite photovoltaics: Slow recombination unveiled.

news & views neighbouring spins are pointing in opposite directions) as a proximity layer is a new approach in the context of magnetic topological insulators. Antiferromagnets and 'artificial antiferromagnets' (engineered heterostructures in which the coupling between ferromagnetic layers can be tuned) are widely used in magnetic memory applications. One of their advantages is the absence of a ...

Tunable THz surface plasmon polariton based on a topological insulator/layered superconductor hybrid structure

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We theoretically investigate the surface plasmon polariton (SPP) at the interface between a three-dimensional stron...

Visualizing ferromagnetic domain behavior of magnetic topological insulator thin films

A systematic magnetic force microscopy (MFM) study of domain behavior in thin films of the magnetic topological insulator Sb1.89V0.11Te3 reveals that in the virgin domain state, after zero-field cooling, an equal population of up and down domains occurs. Interestingly, the cooling field dependence of MFM images demonstrates that a small cooling magnetic field (approximately 5–10 Oe) is sufficie...