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Okazaki, Ryuji.
Hidden Order and Exotic Superconductivity in the Heavy-Fermion Compound URu2Si2 [electronic resource] / by Ryuji Okazaki. - XIII, 102 p. 71 illus. online resource. - Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5053 .
Introduction -- Heavy-Fermion Superconductor URu2Si2 -- Magnetic torque Study on the Hidden-Order Phase -- Lower Critical Field Study on the Superconducting Phase -- Vortex Lattice Melting Transition -- Conclusion.
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.
9784431545927
Physics.
Optical materials.
Physics.
Strongly Correlated Systems, Superconductivity.
Low Temperature Physics.
Optical and Electronic Materials.
QC611.9-611.98
530.41
Hidden Order and Exotic Superconductivity in the Heavy-Fermion Compound URu2Si2 [electronic resource] / by Ryuji Okazaki. - XIII, 102 p. 71 illus. online resource. - Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5053 .
Introduction -- Heavy-Fermion Superconductor URu2Si2 -- Magnetic torque Study on the Hidden-Order Phase -- Lower Critical Field Study on the Superconducting Phase -- Vortex Lattice Melting Transition -- Conclusion.
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.
9784431545927
Physics.
Optical materials.
Physics.
Strongly Correlated Systems, Superconductivity.
Low Temperature Physics.
Optical and Electronic Materials.
QC611.9-611.98
530.41