Charge density wave incommensuration in tise2 systems measured with hard x-ray scattering

Unconventional superconductivity cannot be understood independently of the phases that order around it. Characterizing the charge order in modulated superconductors provides essential information that could reveal a common underlying mechanism. We performed low temperature experiments on 1T-TiSe 2 crystals tuned by three parameters: pressure, copper intercalation, and sulfur substitution. Resistivity measurements revealed a previously unreported superconductive phase in sulfur substituted samples. Our hard x-ray diffraction experiments determined that the charge order phase does not terminate inside the superconductive phase of these systems, as was formerly believed. The phase diagrams established in this work suggest that incommensurations of the charge density wave could play a role in the emergence of superconductivity.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2018

Author dc:creator

• De La Pena Munoz, Gilberto

Contributors dc:contributor

• Abbamonte, Peter M.
• Chiang, Tai-Chang
• Clark, Bryan
• Cooper, Lance

• TiSe2
• CDW
• Charge density wave
• Superconductivity
• X-rays
• Phase transition
• Incommensurate

Statement dc:rights

• Copyright 2018 Gilberto De La Pena Munoz

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/100924

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/100924