Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Kawakami, R K"'
Autor:
Corbett, J. P., Zhu, T., Ahmed, A. S., Tjung, S. J., Repicky, J. J., Takeuchi, T., Kawakami, R. K., Gupta, J. A.
We grew 20-100 nm thick films of B20 FeGe by molecular beam epitaxy and investigated the surface structures via scanning tunneling microscopy. We observed the atomic resolution of each of the four possible chemical layers in FeGe(-1-1-1). An average
Externí odkaz:
http://arxiv.org/abs/1807.00741
Autor:
Ou, Yu-Sheng, Harmon, N. J., Odenthal, Patrick, Kawakami, R. K., Flatté, M. E., Johnston-Halperin, E.
Publikováno v:
Phys. Rev. B 98, 134444 (2018)
We present a simultaneous investigation of coherent spin dynamics in both localized and itinerant carriers in Fe/GaAs heterostructures using ultrafast and spin-resolved pump-probe spectroscopy. We find that for excitation densities that push the tran
Externí odkaz:
http://arxiv.org/abs/1804.04761
Autor:
Ou, Yu-Sheng, Chiu, Yi-Hsin, Harmon, N. J., Odenthal, Patrick, Sheffield, Matthew, Chilcote, Michael, Kawakami, R. K., Flatté, M. E., Johnston-Halperin, E.
We investigate electron spin relaxation in GaAs in the proximity of a Fe/MgO layer using spin-resolved optical pump-probe spectroscopy, revealing a strong dependence of the spin relaxation time on the strength of an exchange-driven hyperfine field. T
Externí odkaz:
http://arxiv.org/abs/1508.00164
Ferromagnetic resonance (FMR) spin pumping is a rapidly growing field which has demonstrated promising results in a variety of material systems. This technique utilizes the resonant precession of magnetization in a ferromagnet to inject spin into an
Externí odkaz:
http://arxiv.org/abs/1311.1441
Autor:
Pu, Yong, Odenthal, P. M., Adur, R., Beardsley, J., Swartz, A. G., Pelekhov, D. V., Kawakami, R. K., Pelz, J., Hammel, P. C., Johnston-Halperin, E.
The use of the spin Hall effect and its inverse to electrically detect and manipulate dynamic spin currents generated via ferromagnetic resonance (FMR) driven spin pumping has enabled the investigation of these dynamically injected currents across a
Externí odkaz:
http://arxiv.org/abs/1311.0965
Autor:
Banishev, A. A., Wen, H., Xu, J., Kawakami, R. K., Klimchitskaya, G. L., Mostepanenko, V. M., Mohideen, U.
Publikováno v:
Phys. Rev. B, v.87, 205433 (2013)
The gradient of the Casimir force between a Si-SiO${}_2$-graphene substrate and an Au-coated sphere is measured by means of a dynamic atomic force microscope operated in the frequency shift technique. It is shown that the presence of graphene leads t
Externí odkaz:
http://arxiv.org/abs/1301.6631
Publikováno v:
J. Appl. Phys. 111, 083912 (2012)
We investigate the initial growth modes and the role of interfacial electrostatic interactions of EuO epitaxy on MgO(001) by reactive molecular beam epitaxy. A TiO2 interfacial layer is employed to produce high quality epitaxial growth of EuO on MgO(
Externí odkaz:
http://arxiv.org/abs/1206.2981
Autor:
Han, Wei, McCreary, K. M., Pi, K., Wang, W. H., Li, Yan, Wen, H., Chen, J. R., Kawakami, R. K.
Publikováno v:
J. Magn. Magn. Mater. Vol. 32, P 369-381 (2012)
We review our recent work on spin injection, transport and relaxation in graphene. The spin injection and transport in single layer graphene (SLG) were investigated using nonlocal magnetoresistance (MR) measurements. Spin injection was performed usin
Externí odkaz:
http://arxiv.org/abs/1108.2930
We immerse single layer graphene spin valves into purified water for a short duration (<1 min) and investigate the effect on spin transport. Following water immersion, we observe an enhancement in nonlocal magnetoresistance. Additionally, the enhance
Externí odkaz:
http://arxiv.org/abs/1108.0380
Publikováno v:
Appl. Phys. Lett. 98, 192101 (2011)
We directly compare the effect of metallic titanium (Ti) and insulating titanium dioxide (TiO2) on the transport properties of single layer graphene. The deposition of Ti results in substantial n-type doping and a reduction of graphene mobility by ch
Externí odkaz:
http://arxiv.org/abs/1104.5289