In this thesis, magnetism and transport phenomena in spin-charge coupled systems on frustrated lattices are theoretically investigated, focusing on Ising-spin Kondo lattice models and using a combination of Monte Carlo simulation and other techniques such as variational calculations and perturbation theory. The emphasis of the study is on how the cooperation of spin-charge coupling and geometrical frustration affects the thermodynamic properties of the Kondo lattice models; it presents the emergence of various novel magnetic states, such as the partial disorder, loop-liquid, and spin-cluster states. The thesis also reveals that the magnetic and electronic states and transport properties of these models demonstrate peculiar features, such as Dirac half-metals, anomalous Hall insulators, and spin Hall effects. Study of novel magnetic states and exotic transport phenomena in Kondo lattice systems is a field experiencing rapid progress. The interplay of charge and spin degrees of freedom potentially gives rise to various novel phases and transport phenomena which are related to strongly correlated electrons, frustrated magnetism, and topological states of matter. The results presented in this thesis include numerical calculations that are free from approximations. Accordingly, they provide reliable reference values, both for studying magnetism and transports of related models and for experimentally exploring novel states of matter in metallic magnets.
In this thesis, magnetism and transport phenomena in spin-charge coupled systems on frustrated lattices are theoretically investigated, focusing on Ising-spin Kondo lattice models and using a combination of Monte Carlo simulation and other techniques such as variational calculations and perturbation theory. The emphasis of the study is on how the cooperation of spin-charge coupling and geometrical frustration affects the thermodynamic properties of the Kondo lattice models; it presents the emergence of various novel magnetic states, such as the partial disorder, loop-liquid, and spin-cluster states. The thesis also reveals that the magnetic and electronic states and transport properties of these models demonstrate peculiar features, such as Dirac half-metals, anomalous Hall insulators, and spin Hall effects. Study of novel magnetic states and exotic transport phenomena in Kondo lattice systems is a field experiencing rapid progress. The interplay of charge and spin degrees of freedom potentially gives rise to various novel phases and transport phenomena which are related to strongly correlated electrons, frustrated magnetism, and topological states of matter. The results presented in this thesis include numerical calculations that are free from approximations. Accordingly, they provide reliable reference values, both for studying magnetism and transports of related models and for experimentally exploring novel states of matter in metallic magnets.
A remarkable and true tale of loyalty, vengeance, and ritual suicide. . . . In the spring of 1701, the regional lord Asano Naganori wounded his supervising official, Kira Yoshinaka, during an important ceremony in the ruling shogunate's Edo Castle and was at once condemned to death. Within two years, in the dead of winter, a band of forty-seven of Asano's retainers avenged him by breaking into Yoshinaka’s mansion and killing him. Subsequently, all the men were sentenced to death but allowed to perform it honorably by seppuku. This incident—often called the Ako Incident—became a symbol of samurai honor andat once prompted stage dramatization in kabuki and puppet theater. It has since has been told and retold in short and long stories, movies, TV dramas. The story has also attracted the attention of foreign writers and translators. The most recent retelling was the 2013 Hollywood film 47 Ronin, with Keanu Reeves, though it was wildly and willfully distorted. What did actually happen and how has this famous vendetta resonated through history? Hiroaki Sato's examination is a close, comprehensive look at the Ako Incident through the context of its times, portraits of the main protagonists, and its literary legacy in the haiku ofthe avengers. Also included is Sato's new translation of Akutagawa Ryunosuke's short story about leader Oishi Kuranosuke as he awaited sentencing.
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