Results 11 to 16 of 16
The main objective of this project is to measure directly and exploit the perfect spin-polarisation of currents carried by the edge states in InAs/GaSb quantum spin Hall systems, which arises through spin-momentum locking. This system is a two-dimensional topological insulator (TI), capable of being grown by molecular beam epitaxy in Leeds. The successful candidate will...
Frustration is the inability of a physical system to simultaneously satisfy competing constraints. It occurs across physics and beyond, but is a particularly important topic in magnetism, a field in which (relatively) simple systems can be represented by toy statistical mechanical models that can then be extended into other fields model phenomena as diverse as...
Topological insulators are an existing class of band-gap insulators, whilst they do conduct through their edge (or the surface in the case of 3 dimensional materials). These gapless metallic surface states are naturally generated with helically-polarized spin texture due to strong spin-orbit coupling with a peculiar energy band structure of materials. Moreover the states are...
The search for Majorana fermions (MF) has been one of the most prominent subjects in physics. One of important aspects of the MFs is that they are their own antiparticles, and therefore mysterious uncharged quasiparticles that can create a zero-mode Majorana state bounded at zero energy at the middle of superconducting gap. Zero-mode MFs obey...
THz emitters are extremely useful and to secure their future as devices, there needs to be a means of cheaply producing THz radiation. Thus far, solid state emitters are often based on semiconductors whereas metals offer significant advantages: their absorption is nearly independent of wavelength, broadband photocurrents, a featureless THz refractive index and a large...
We are just starting a large grant from EPSRC (~£1M) to develop a multifunctional scanning microscope. Part of the application is about providing scanning probe ability (AFM for example) as a function of temperature in large vector fields. However a significant part is the development of a new microscope. The development work will involve altering...