Overview
- Describes precise magnetic torque measurement using micro cantilever and local magnetization measurement using micro-Hall array
- Investigates the symmetry breaking in the hidden-order phase of URu2Si2 and vortex state in the superconducting phase
- Covers observation of the vortex lattice melting transition in ultraclean URu2Si2 single crystals at sub-Kelvin temperatures
- Nominated as an outstanding contribution by Kyoto University's Physics Department in 2013
Part of the book series: Springer Theses (Springer Theses)
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Table of contents (6 chapters)
Keywords
About this book
In this thesis, the author investigates hidden-order phase transition at T0 = 17.5 K in the heavy-fermion URu2Si2. The four-fold rotational symmetry breaking in the hidden order phase, which imposes a strong constraint on the theoretical model, is observed through the magnetic torque measurement. The translationally invariant phase with broken rotational symmetry is interpreted as meaning that the hidden-order phase is an electronic “nematic” phase. The observation of such nematicity in URu2Si2 indicates a ubiquitous nature among the strongly correlated electron systems.
The author also studies the superconducting state of URu2Si2 below Tc = 1.4 K, which coexists with the hidden-order phase. A peculiar vortex penetration in the superconducting state is found, which may be related to the rotational symmetry breaking in the hidden-order phase. The author also identifies a vortex lattice melting transition. This transport study provides essential clues to the underlying issue of quasiparticle dynamics as to whether a quasiparticle Bloch state is realized in the periodic vortex lattice.
Authors and Affiliations
About the author
Department of Physics, Nagoya University,
Chikusa, Nagoya 464-8602, Japan.
Bibliographic Information
Book Title: Hidden Order and Exotic Superconductivity in the Heavy-Fermion Compound URu2Si2
Authors: Ryuji Okazaki
Series Title: Springer Theses
DOI: https://doi.org/10.1007/978-4-431-54592-7
Publisher: Springer Tokyo
eBook Packages: Physics and Astronomy, Physics and Astronomy (R0)
Copyright Information: Springer Japan 2013
Hardcover ISBN: 978-4-431-54591-0Published: 12 December 2013
Softcover ISBN: 978-4-431-56359-4Published: 27 August 2016
eBook ISBN: 978-4-431-54592-7Published: 29 November 2013
Series ISSN: 2190-5053
Series E-ISSN: 2190-5061
Edition Number: 1
Number of Pages: XIII, 102
Number of Illustrations: 71 illustrations in colour
Topics: Strongly Correlated Systems, Superconductivity, Low Temperature Physics, Optical and Electronic Materials