105 citations · 119 across the 2 of their papers we have counts for
5 papers
Scaling Theory of Quantum Ratchet
Keita Hamamoto, Takamori Park, Hiroaki Ishizuka +1
The asymmetric responses of the system between the external force of right and left directions are called "nonreciprocal". There are many examples of nonreciprocal responses such a…
Spin supercurrent in two-dimensional superconductors with Rashba spin-orbit interaction
James Jun He, Kanta Hiroki, Keita Hamamoto +1
Spin current is a central theme in spintronics, and its generation is a keen issue. The spin-polarized current injection from the ferromagnet, spin battery, and spin Hall effect ha…
Nonreciprocal charge transport in two-dimensional noncentrosymmetric superconductors
Shintaro Hoshino, Ryohei Wakatsuki, Keita Hamamoto +1
Nonreciprocal charge transport phenomena are studied theoretically for two-dimensional noncentrosymmetric superconductors under an external magnetic field . Rashba superconducto…
Electrical detection of a skyrmion in a magnetic tunneling junction
Keita Hamamoto, Naoto Nagaosa
We theoretically investigated a method to detect a single skyrmion in a magnetic tunneling junction (MTJ) geometry. Using the tunneling Hamiltonian approach, we calculated the tunn…
Nonlinear spin current generation in noncentrosymmetric spin-orbit coupled systems
Keita Hamamoto, Motohiko Ezawa, Kun Woo Kim +2
Spin current plays a central role in spintronics. In particular, finding more efficient ways to generate spin current has been an important issue and studied actively. For example,…