Towards probing zero energy bound states with circuit QED in topological insulator junctions

Visa enkel post
dc.contributor.authorAlcalde Herraiz, Núria
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskap (MC2)sv
dc.contributor.departmentChalmers University of Technology / Department of Microtechnology and Nanoscience (MC2)en
dc.contributor.examinerBauch, Thilo
dc.contributor.supervisorPullukattuthara Surendran, Ananthu
dc.contributor.supervisorBauch, Thilo
dc.contributor.supervisorLombardi, Floriana
dc.date.accessioned2023-01-13T09:35:30Z
dc.date.available2023-01-13T09:35:30Z
dc.date.issued2023
dc.date.submitted2023
dc.description.abstractMajorana fermions are aimed to be observed in a spin-non-degenerate system where particle-hole symmetry is imposed. Such a landscape was proposed by Fu and Kane to be formed at the interface between a topological insulator and a superconductor. Topological insulators are insulating materials in the bulk, but that present metallic states with spin non-degeneracy at the surface. These metallic states in the vicinity of an ordinary superconductor become superconducting by proximity effect imposing the particle-hole symmetry, hence an scenario were Majorana fermions observation is possible. Taking first steps towards Majorana engineering, the aim of the thesis is to study the energy band structure of a STIS junction. The STIS junction studied was made from bismuth selenide nanowires and aluminium electrode contacts and then embedded in a RF-SQUID loop coupled to a resonator. This configuration allowed to characterize the band structure of the STIS junction probing its susceptibility through microwave reflectometry measurements. The experimental data was then compared to an STIS short ballistic junction model obtaining a relaxation parameter γD = 2 GHz and a microwave transitions rate of γND = 3 GHz for probing frequency 4.20 GHz and γND = 10 GHz at 8.16 GHz.
dc.identifier.coursecodeMCCX04
dc.identifier.urihttps://odr.chalmers.se/handle/20.500.12380/305933
dc.language.isoeng
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectmajorana fermions, topological insulator, josephson junction, band structure, susceptibility, microwave reflectometry
dc.titleTowards probing zero energy bound states with circuit QED in topological insulator junctions
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster's Thesisen
dc.type.uppsokH
local.programmeNanotechnology (MPNAT), MSc
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
Towards probing zero energy bound states with circuit QED in topological insulator junctions.pdf
Storlek:
9.07 MB
Format:
Adobe Portable Document Format
Beskrivning:
Ladda ner
License bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
license.txt
Storlek:
2.35 KB
Format:
Item-specific license agreed upon to submission
Beskrivning:
Ladda ner
Samling
Examensarbeten för masterexamen