Confinement of electromagnetic fields at the subwavelength scale via metamaterial
paradigms is an established method to engineer light–matter interaction in most common …

A topological insulator (TI) is a kind of novel material hosting a topological band structure
and plenty of exotic topological quantum effects. Achieving quantized electrical transport …

Group IV monochalcogenides have recently shown great potential for their thermoelectric,
ferroelectric, and other intriguing properties. The electrical properties of group IV …

Abstract Recently, Bi1Te1 has been proved to be a dual topological insulator (TI), a new
subclass of symmetry-protected topological phases, and predicted to be higher order …

We report magnetotransport measurements on Bi 1 Sb 1 Te 1.5 Se 1.5/RuCl 3
heterostructure nanodevices. Bi 1 Sb 1 Te 1.5 Se 1.5 (BSTS) is a strong three-dimensional …

Phase-coherent transport manifests itself in various quantum phenomena. Universal
conductance fluctuations (UCF) are one of them. Here, we report the detailed study of …

Intrinsic magnetic topological insulators (MTIs) host exotic topological phases such as
quantized anomalous Hall insulating phase, arising due to the large magnetic exchange …

In the exploration of three-dimensional quaternary topological insulators, understanding
surface states has become pivotal for unraveling the underlying physics and tapping into …

We performed the structural characterization of BSTS and RuCl3 single crystals. The single
crystal was oriented such that the X-ray scattering vector is perpendicular to the (0, 0, L) …

The main focus of this thesis was the development and investigation of reliable and high
quality MBE grown quaternary (Bi1-xSbx) 2 (Te1-ySey) 3 (BSTS) samples. The promise of …