340 citations · 1.9k across the 87 of their papers we have counts for
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Twisted Singlet in Semiconductor Artificial Molecules
Hiroshi Imamura
The spin-configuration of semiconductor artificial molecules consisting of quantum dots and spin field effect transistors is studied theoretically. We find that the antiferromagnet…
The effect of large quantum fluctuation on the noise of a single-electron transistor
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
We theoretically investigate the noise of a single-electron transistor in the regime of large quantum fluctuation of charge out of equilibrium. We show that the charge noise is sup…
Noise of a single-electron transistor in the regime of large quantum fluctuations of island charge out of equilibrium
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
By using the drone-fermion representation and the Schwinger-Keldysh approach, we calculate the current noise and the charge noise for a single-electron transistor in the non-equili…
Andreev Reflection in Ferromagnet/Superconductor/Ferromagnet Double Junction Systems
Taro Yamashita, Hiroshi Imamura, Saburo Takahashi +1
We present a theory of Andreev reflection in a ferromagnet/superconductor/ferromagnet double junction system. The spin polarized quasiparticles penetrate to the superconductor in t…
Kondo effect in quantum dots coupled to ferromagnetic leads
J. Martinek, Y. Utsumi, H. Imamura +4
We study the Kondo effect in a quantum dot which is coupled to ferromagnetic leads and analyse its properties as a function of the spin polarization of the leads. Based on a scalin…
Parity Effect and Tunnel Magnetoresistance of Ferromagnet / Superconductor / Ferromagnet Single-Electron Tunneling Transistors
Hiroshi Imamura, Yasuhiro Utsumi, Hiromichi Ebisawa
We theoretically study the tunnel magnetoresistance(TMR) of ferromagnet / superconductor / ferromagnet single-electron tunneling transistors with a special attention to the parity…