Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Majorana bound states"”.
-
Rotational Symmetry and Phase Dynamics in Topological Superconductors
… tied to topological superconductors are Majorana bound states. These are neutral zero-energy quasiparticles, localised to boundaries or defects, that are highly sought after as ingredients for quantum computation. In the first part of this thesis, we consider two-dimensional crystalline …
-
Investigation of current-phase relation in topological insulator Josephson junction
… junction (TIJJ). In a magnetic field, localized Majorana bound states (MBS) are predicted to exist at the core of Josephson vortices. One of the key characteristics of such MBS in TIJJ system is that they possess a 4π periodic CPR, instead of conventional 2π sinusoidal CPR. Our measurements of …
-
The superconducting proximity effect in Bi2Se3 thin-films
States of matter distinguished by the topology of their bands rather than any broken symmetry represent a vast, largely unexplored realm of condensed matter physics. Such states, realized in condensed matter systems, support exotic excitations that obey rules distinct from fermions and bosons. They …
-
Electric multipole moments and higher-order topological phases in crystalline insulators and superconductors
… these moments are quantized, and their boundary signatures fractionalized. These higher multipole moments then correspond to new symmetry-protected topological phases (SPTs). A salient signature of these SPTs is the existence of zero-dimensional, corner-localized mid-gap energy states. …
-
Josephson Effects in the Iron-Based Superconductor FeTe$_{1-x}$Se$_{x}$
… phenomena such as S$\pm$ superconductivity, Majorana bound states, and higher-order topological superconductivity, among others. Despite the interest in superconducting devices based on FeTe$_{1-x}$Se$_x$, there have been relatively few demonstrations of Josephson junctions in …
-
Anyonic symmetry and twist defects
… the anyonic excitations of Abelian topological states. Then, we study properties of semiclassical point defects, called twist defects, which permute orbiting anyons by their symmetries. We see how to realize these defects at domain walls on the gapped edges of non-chiral fractional quantum Hall …
-
Phase-sensitive probes of extended topological Josephson junctions
… In particular, the possibility of generating Majorana bound states (MBSs) in these hybrid systems has provided motivation for many experiments targeting signatures of MBSs. In recent years, theoretical and experimental progress has been made in studying the Josephson effect in …
-
Engineering superconductivity in ballistic semiconductor nanowires
… proposals to use 1D nanostructure to realize Majorana zero modes, quasiparticles that are relevant for topological quantum computing, many groups have attempted to engineer these modes in hybrid semiconductor-superconductor devices. While evidence for Majorana bound states in nanowires has …