By Ryuji Okazaki

In this thesis, the writer investigates hidden-order section transition at T0 = 17.5 ok within the heavy-fermion URu2Si2. The four-fold rotational symmetry breaking within the hidden order section, which imposes a powerful constraint at the theoretical version, is saw in the course of the magnetic torque size. The translationally invariant part with damaged rotational symmetry is interpreted as which means that the hidden-order section is an digital “nematic” section. The remark of such nematicity in URu2Si2 shows a ubiquitous nature one of the strongly correlated electron systems.

The writer additionally reports the superconducting nation of URu2Si2 below Tc = 1.4 ok, which coexists with the hidden-order section. a unusual vortex penetration within the superconducting nation is located, that could be on the topic of the rotational symmetry breaking within the hidden-order section. the writer additionally identifies a vortex lattice melting transition. This delivery research offers crucial clues to the underlying factor of quasiparticle dynamics as to if a quasiparticle Bloch country is discovered within the periodic vortex lattice.

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