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89 papers
Three-Channel Kondo Effect Emerging from Ho Ions
Takashi Hotta
We illustrate the emergence of the three-channel Kondo effect in a seven-orbital impurity Anderson model hybridized with and conduction electron bands employing a numer…
Quantum Critical Point between Two-Channel Kondo and Fermi-Liquid Phases
Takashi Hotta
We investigate the emergence of quantum critical points near a two-channel Kondo phase by evaluating an -electron entropy of a seven-orbital impurity Anderson model hybridized w…
Microscopic Theory of Quadrupole Ordering in Pr Compounds on the Basis of a - Coupling Scheme
Ryosuke Yamamura, Takashi Hotta
Toward the understanding of incommensurate quadrupole ordering in PrPb, we develop a microscopic theory of multipole ordering in -electron systems from an itinerant…
Impurity Effects in Nodal Extended - and Nodeless -Wave Superconductors: Gap Symmetry of BiS-Based Layered Superconductors
Akihiro Ichikawa, Takashi Hotta
In BiS-based layered superconductors,the existence of gap nodes on Fermi-surface curves has been suggested from angle-resolved photoemission spectroscopy measurements, whereas…
Kondo effect in the seven-orbital Anderson model hybridized with conduction electrons
Takashi Hotta
We clarify the two-channel Kondo effect in the seven-orbital Anderson model hybridized with conduction electrons by employing a numerical renormalization group method.From th…
Local nodal Cooper pairs in multiorbital systems
Kazumasa Hattori, Takuya Nomoto, Takashi Hotta +1
We show the emergence of a new class of superconductivity in multiorbital systems, focusing on non-Kramers f states. The Cooper pairs in this class of superconductivity mainly…