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5 papers · 2 filters
Spin Seebeck insulator
K. Uchida, J. Xiao, H. Adachi +10
Thermoelectric generation is an essential function of future energy-saving technologies. However, this generation has been an exclusive feature of electric conductors, a situation…
Theory of magnon-driven spin Seebeck effect
Jiang Xiao, Gerrit E. W. Bauer, Ken-ichi Uchida +2
The spin Seebeck effect is a spin-motive force generated by a temperature gradient in a ferromagnet that can be detected via normal metal contacts through the inverse spin Hall eff…
First-principles accurate total-energy surfaces for polar structural distortions of BaTiO3, PbTiO3, and SrTiO3: consequences to structural transition temperatures
Takeshi Nishimatsu, Masaya Iwamoto, Yoshiyuki Kawazoe +1
Specific forms of the exchange correlation energy functionals in first-principles density functional theory-based calculations, such as the local density approximation (LDA) and ge…
Valence evaluation of LiMnO2 and related battery materials by x-ray absorption spectroscopy
H. Wadati, D. G. Hawthorn, T. Z. Regier +5
We present an x-ray absorption study of the oxidation states of transition-metal-ions of LiMnO2 and its related materials, widely used as cathodes in Li-ion batteries. The comparis…
Charge-density depinning at metal contacts of graphene field-effect transistors
Ryo Nouchi, Katsumi Tanigaki
An anomalous distortion is often observed in the transfer characteristics of graphene field-effect transistors. We fabricate graphene transistors with ferromagnetic metal electrode…