JOPSS - Search Results

Charge-to-spin conversion induced by the Rashba-Edelstein effect was directly observed for the first time in samples with no magnetic layer. A spin-polarized positron beam was used to probe the spin polarization of the outermost surface electrons of Bi/Ag/AlO and Ag/Bi/AlO when charge currents were only associated with the Ag layers. An opposite surface spin polarization was found between Bi/Ag/AlO and Ag/Bi/AlO samples with the application of a charge current in the same direction. The surface spin polarizations of both systems decreased exponentially with the outermost layer thickness, suggesting the occurrence of spin diffusion from the Bi/Ag interface to the outermost surfaces. This work provides a new technique to measure spin diffusion length.

Journal Articles

Anisotropic two-dimensional electron gas at the LaAlO $_{3}$ /SrTiO $_{3}$ (110) interface

Annadi, A.*; Zhang, Q.*; Renshaw Wang, X.*; Tuzla, N.*; Gopinadhan, K.*; L, W. M.*; Roy Barman, A.*; Liu, Z. Q.*; Srivastava, A.*; Saha, S.*; et al.

Nature Communications (Internet), 4, p.1838_1 - 1838_7, 2013/05

https://doi.org/10.1038/ncomms2804

Times Cited Count：108 Percentile：94.33(Multidisciplinary Sciences)

Journal Articles

The Spin Hall effect as a probe of nonlinear spin fluctuations

Wei, D. H.*; Niimi, Yasuhiro*; Gu, B.; Ziman, T.*; Maekawa, Sadamichi; Otani, Yoshichika*

Nature Communications (Internet), 3, p.1058_1 - 1058_5, 2012/09

https://doi.org/10.1038/ncomms2063

Times Cited Count：41 Percentile：81.37(Multidisciplinary Sciences)

Journal Articles

0.56 GeV laser electron acceleration in ablative-capillary-discharge plasma channel

Kameshima, Takashi; Hong, W.*; Sugiyama, Kiyohiro*; Wen, X.*; Wu, Y.*; Tang, C.*; Zhu, Q.*; Gu, Y.*; Zhang, B.*; Peng, H. S.*; et al.

Applied Physics Express, 1(6), p.066001_1 - 066001_3, 2008/05

https://doi.org/10.1143/APEX.1.066001

Times Cited Count：46 Percentile：81.09(Physics, Applied)

A high-quality electron beam with a central energy of 0.56 GeV, an energy spread of 1.2 % rms, and a divergence of 0.59 mrad rms was produced by means of a 4cm ablative-capillary-discharge plasma channel driven by a 3.8 J 27 fs laser pulse. This is the first demonstration of electron acceleration with an ablative capillary discharge where in the capillary is stably operated in vacuum with a simple system triggered by a laser pulse. This result of the generation of a high-quality beam provides the prospects to realize a practical accelerator based on laser-plasma acceleration.

Journal Articles

Beam cooling experiment at ion storage ring, S-LSR

Shirai, Toshiyuki*; Tanabe, Mikio*; Soda, Hikaru*; Ikegami, Masahiro*; Fujimoto, Shinji*; Tongu, Hiromu*; Noda, Akira*; Noda, Koji*; Shibuya, Shinji*; Fujimoto, Tetsuya*; et al.

Proceedings of 9th Symposium on Accelerator and Related Technology for Application, p.19 - 22, 2007/06

Journal Articles

Elongation of plasma channel for electron acceleration

Chen, L.-M.; Nakajima, Kazuhisa; Hong, W.*; Hua, J. F.*; Kameshima, Takashi; Kotaki, Hideyuki; Sugiyama, Kiyohiro*; Wen, X.*; Wu, Y.*; Tang, C.*; et al.

Chinese Optics Letters, 5(S1), p.S133 - S135, 2007/05

Journal Articles

Self-guiding of 100 TW femtosecond laser pulses in centimeter-scale underdense plasma

Chen, L.-M.; Kotaki, Hideyuki; Nakajima, Kazuhisa*; Koga, J. K.; Bulanov, S. V.; Tajima, Toshiki; Gu, Y. Q.*; Peng, H. S.*; Wang, X. X.*; Wen, T. S.*; et al.

Physics of Plasmas, 14(4), p.040703_1 - 040703_4, 2007/04

https://doi.org/10.1063/1.2720374

Times Cited Count：39 Percentile：75.10(Physics, Fluids & Plasmas)

An experiment for the laser self-guiding studies has been carried out with 100 TW laser pulse interaction with the long underdense plasma. Formation of extremely long plasma channel with its length, about 10 mm, 20 times above the Rayleigh length is observed. The self-focusing channel features such as the laser pulse significant bending and the electron cavity formation are demonstrated experimentally for the first time.

Journal Articles

Incommensurate lattice distortion in the high temperature tetragonal phase of La $_{2-x}$ (Sr,Ba) $_{x}$ CuO $_{4}$

Wakimoto, Shuichi; Kimura, Hiroyuki*; Fujita, Masaki*; Yamada, Kazuyoshi*; Noda, Yukio*; Shirane, Gen*; Gu, G.*; Kim, H.*; Birgeneau, R. J.*

Journal of the Physical Society of Japan, 75(7), p.074714_1 - 074714_6, 2006/07

https://doi.org/10.1143/JPSJ.75.074714

Times Cited Count：27 Percentile：73.22(Physics, Multidisciplinary)

We report incommensurate diffuse (ICD) scattering appearing in the high-temperature-tetragonal (HTT) phase of La $_{2-x}$ (Sr,Ba) $_{x}$ CuO $_{4}$ with observed by the neutron diffraction technique. For all compositions, a sharp superlattice peak of the low-temperature-orthorhombic (LTO) structure is replaced by a pair of ICD peaks with the modulation vector parallel to the CuO octahedral tilting direction, that is, the diagonal Cu-Cu direction of the CuO plane, above the LTO-HTT transition temperature . The temperature dependences of the incommensurability for all samples scale approximately as , while those of the integrated intensity of the ICD peaks scale as $(T-T_s)^{-1}$ . These observations together with absence of ICD peaks in the non-superconducting sample evince a universal incommensurate lattice instability of hole-doped 214 cuprates in the superconducting regime.

Oral presentation

Incommensurate lattice distortion in the high temperature tetragonal phase of La $_{2-x}$ (Sr,Ba) $_{x}$ CuO $_{4}$

Wakimoto, Shuichi; Kimura, Hiroyuki*; Fujita, Masaki*; Yamada, Kazuyoshi*; Noda, Yukio*; Shirane, Gen*; Gu, G.*; Kim, H.*; Birgeneau, R. J.*

no journal, ,

We report incommensurate diffuse (ICD) scattering appearing in the high-temperature-tetragonal (HTT) phase of La $_{2-x}$ (Sr,Ba) $_{x}$ CuO $_{4}$ with 0.07 0.20 observed by the neutron diffraction technique. For all compositions, a sharp superlattice peak of the low-temperature-orthorhombic (LTO) structure is replaced by a pair of ICD peaks with a modulation vector parallel to the CuO octahedral tilting direction, that is, the diagonal Cu-Cu direction of the CuO plane, above the LTO-HTT transition temperature . The temperature dependences of incommensurability for all samples scale approximately to , while those of integrated intensity of the ICD peaks scale to . Those observations together with absence of ICD peaks in the non-superconducting sample evince a universal incommensurate lattice instability of hole-doped 214 cuprates in the superconducting regime.