作者：Mikito Koga , Masashige Matsumoto , Hiroaki Kusunose 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (6)JPS 摘要：We study an orbitally degenerate Kondo effect in a triangular triple quantum dot (TTQD), where the three dots are connected vertically with a single metallic lead through electron tunneling. Both spin and orbital degrees of freedom play an important role in the SU(4) Kondo e...
 作者：Mikito Koga , Masashige Matsumoto , Hiroaki Kusunose 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2017, Vol.86 (5)JPS 摘要：We study the local antisymmetric spin–orbit (ASO) coupling effect on spin, orbital, and charge degrees of freedom for the Kondo effect in a triangular triple quantum dot (TTQD). Here, one of the three QDs is coupled to a metallic lead through electron tunneling, and a local ...
 作者：Mikito Koga , Masashige Matsumoto 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2019, Vol.88 (3)JPS 摘要：Crystal field triplet ground states in f 2 configurations such as Pr ions have quadrupolar coupling as well as magnetic coupling to conduction electrons, leading to a nontrivial non-Fermi liquid Kondo physics associated with quadrupole degrees of freedom. In particular...
 作者：Mikito Koga , Masashige Matsumoto 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2020, Vol.89 (2)JPS 摘要：Motivated by the recent progress of phonon-mediated control in quantum spin devices, we propose a possibility of hybrid measurement using electron paramagnetic resonance (EPR) and a surface acoustic wave (SAW). Considering quadrupole-strain (QS) couplings suggested for silicon va...
 作者：Masashige Matsumoto , Kosuke Chimata , Mikito Koga 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2017, Vol.86 (3)JPS 摘要：Spin-dependent electric dipole operators are investigated group-theoretically for the emergence of an electric dipole induced by a single spin or by two spins, where the spin dependences are completely classified up to the quadratic order. For a single spin, a product of spin ope...
 作者：Masashige Matsumoto , Mikito Koga 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2019, Vol.88 (9)JPS 摘要：$$P\bar{3}c1$$
 作者：Mikito Koga , Masashige Matsumoto , Hiroaki Kusunose 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2013, Vol.82 (9)JPS 摘要：The Kondo effect plays an important role in the emergence of electric polarization in a triangular triple-quantum-dot system, where one of the three dots is connected to a metallic lead through a point contact. The interplay between spin and charge distributions is investigated o...
 作者：Mikito Koga , Masashige Matsumoto , Hiroaki Kusunose 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2014, Vol.83 (8)JPS 摘要：A magnetic flux effect is studied theoretically on an electric polarization induced by the Kondo effect in a triangular triple-quantum-dot system, where one of the three dots is connected to a metallic lead. This electric polarization exhibits an Aharonov–Bohm oscillation as...
 作者：Mikito Koga , Yoshiaki Sato ... 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2013, Vol.82 (7)JPS 摘要：$$-\ln T$$]]> dependence is detected in the [100] and [110] directions below K, suggesting the screening of quadrupolar moments. In contrast, χ3 in the [111] direction becomes constant below
 作者：Masashige Matsumoto , Mikito Koga , Hiroaki Kusunose 来源：[J].Journal of the Physical Society of Japan(IF 2.087), 2013, Vol.82 (3)JPS 摘要：$$p$$