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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.
| Autorius: | Ryuji Okazaki |
| Serija: | Springer Theses |
| Leidėjas: | Springer Japan |
| Išleidimo metai: | 2013 |
| Knygos puslapių skaičius: | 116 |
| ISBN-10: | 4431545913 |
| ISBN-13: | 9784431545910 |
| Formatas: | 241 x 160 x 13 mm. Knyga kietu viršeliu |
| Kalba: | Anglų |
Parašykite atsiliepimą apie „Hidden Order and Exotic Superconductivity in the Heavy-Fermion Compound URu2Si2“
