Multipolar order and fluctuations in TmAg2 and YbRu2Ge2
Abstract/Contents
- Abstract
- In this thesis we will show thermodynamic and transport properties of two 4f intermetallic materials, YbRu2Ge2 and TmAg2. Both of these materials have been proposed to undergo ferroquadrupolar phase transitions in the B1g symmetry channel, at 10.2K and 5K respectively. The B1g elastoresistivity and low-temperature X-ray measurements of YbRu2Ge2, and the strain-tuning of the phase transition for TmAg2 as inferred from the elastocaloric technique, that are presented here establish that this is indeed the case for both of these materials. We investigate in detail how both of these ferroquadrupolar phase transitions can be/are suppressed towards a quantum phase transition at 0K, through the application of a magnetic field applied along the c-axis at 21.3T and 3.1T for YbRu2Ge2 and TmAg2 respectively. The quadrupole-strain susceptibilities of these materials are investigated throughout their respective H-T phase diagrams (using two different complimentary probes), revealing higher-order octupolar couplings in YbRu2Ge2, and a transverse-field mean field Ising susceptibility for the quadrupole-strain susceptibility of TmAg2. Resistivity measurements indicate potential signatures of quantum criticality in the proximity of the field-suppressed ferroquadrupolar phase transition for YbRu2Ge2
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Rosenberg, Elliott William |
|---|---|
| Degree supervisor | Fisher, Ian H, 1969- |
| Thesis advisor | Fisher, Ian H, 1969- |
| Thesis advisor | Kapitulnik, Aharon |
| Thesis advisor | Kivelson, Steven |
| Degree committee member | Kapitulnik, Aharon |
| Degree committee member | Kivelson, Steven |
| Associated with | Stanford University, Department of Applied Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Elliott Rosenberg |
|---|---|
| Note | Submitted to the Department of Applied Physics |
| Thesis | Thesis Ph.D. Stanford University 2020 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by Elliott William Rosenberg
- License
- This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).
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