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Development of Tools for Probing Order in Single Crystals Using Electron and Photon Spectroscopy


Deshpande, Tejas Makarand (2020) Development of Tools for Probing Order in Single Crystals Using Electron and Photon Spectroscopy. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/tt7b-fm83.


Discovering novel quantum phases of matter–from emergent behavior of strongly-correlated electrons in solid-state systems to superfluidity in quantum degenerate liquids–has been a cornerstone of condensed matter physics for many decades. In the most recent decades, however, the discovery of topological phases has emphasized the importance of symmetry, in addition to the conventional paradigm of symmetry breaking, in the definition of the order parameter, Ψ, and hence the quantum phase it represents. Naturally, novel experimental tools, capable of coupling to said order parameter, directly or indirectly, are required to discover conventionally elusive quantum phases. In this thesis, I will discuss experimental techniques, using both photon and electron spectroscopy, to study exotic electronic phases in single crystals. The thesis will be divided into two unequal parts: (a) the development of a high-energy-resolution sub-Kelvin angle-resolved photoemission spectroscopy apparatus to study 3D time-reversal invariant topological superconductors, and (b) the experiments exploiting the non-linear and time-resolved aspects of femtosecond lasers to study a broad class of many-body systems.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Condensed matter physics; Topological superconductors; Cryogenics; Lasers; Angle-Resolved Photoelectron Spectroscopy; Ultrahigh vacuum
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Applied Physics
Awards:R.K. Kar Award for Research in Physics, 2018.
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Hsieh, David
Thesis Committee:
  • Motrunich, Olexei I. (chair)
  • Eisenstein, James P.
  • Alicea, Jason F.
  • Hsieh, David
Defense Date:19 September 2019
Record Number:CaltechTHESIS:06022020-110730808
Persistent URL:
Deshpande, Tejas Makarand0000-0003-0326-1372
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13768
Deposited By: Tejas Deshpande
Deposited On:02 Jun 2020 22:03
Last Modified:24 Aug 2021 20:26

Thesis Files

PDF (Thesis) - Final Version
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