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Coexistence of ferromagnetic and stripe-type antiferromagnetic spin fluctuations in YFe$$_{2}$$Ge$$_{2}$$

Wo, H.*; Wang, Q.*; Shen, Y.*; Zhang, X.*; Hao, Y.*; Feng, Y.*; Shen, S.*; He, Z.*; Pan, B.*; Wang, W.*; et al.

Physical Review Letters, 122(21), p.217003_1 - 217003_5, 2019/05

 被引用回数:2 パーセンタイル:52.32(Physics, Multidisciplinary)

We report neutron scattering measurements of single-crystalline YFe$$_{2}$$Ge$$_{2}$$ in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe$$_{2}$$Ge$$_{2}$$ does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe$$_{2}$$Ge$$_{2}$$ displays anisotropic stripe-type antiferromagnetic spin fluctuations at ($$pi, 0, pi$$). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector ($$0, 0, pi$$). These ferromagnetic spin fluctuations are isotropic in the ($$H, K$$) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe$$_{2}$$Ge$$_{2}$$ and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials.


Searching for observable effects induced by anomalous triangle singularities

Liu, X.-H.*; 岡 眞; Zhao, Q.*

Physics Letters B, 753, p.297 - 302, 2016/02

 被引用回数:69 パーセンタイル:1.1(Astronomy & Astrophysics)



Diluted ferromagnetic semiconductor Li(Zn,Mn)P with decoupled charge and spin doping

Deng, Z.*; Zhao, K.*; Gu, B.; Han, W.*; Zhu, J. L.*; Wang, X. C.*; Li, X.*; Liu, Q. Q.*; Yu, R. C.*; 後神 達郎*; et al.

Physical Review B, 88(8), p.081203_1 - 081203_5, 2013/08

 被引用回数:61 パーセンタイル:6.96(Materials Science, Multidisciplinary)

We report the discovery of a diluted magnetic semiconductor, Li(Zn,Mn)P, in which charge and spin are introduced independently via lithium off-stoichiometry and the isovalent substitution of Mn$$^{2+}$$ for Zn$$^{2+}$$, respectively. Isostructural to (Ga,Mn)As, Li(Zn,Mn)P was found to be a ${it p}$-type ferromagnetic semiconductor with excess lithium providing charge doping. First-principles calculations indicate that excess Li is favored to partially occupy the Zn site, leading to hole doping. Ferromagnetism with Curie temperature up to 34 K is achieved while the system still shows semiconducting transport behavior.


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$"u$, 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

 被引用回数:81 パーセンタイル:4.65(Multidisciplinary Sciences)

We report the observation of unexpected conductivity at the LaAlO$$_{3}$$/SrTiO$$_{3}$$ interface prepared on (110)-oriented SrTiO$$_{3}$$, with a LaAlO$$_{3}$$-layer thickness-dependent metal-insulator transition. Density functional theory calculation reveals that electronic reconstruction, and thus conductivity, is still possible at this (110) interface by considering the energetically favourable (110) interface structure, that is, buckled TiO$$_{2}$$/LaO, in which the polarization discontinuity is still present. The conductivity was further found to be strongly anisotropic along the different crystallographic directions with potential for anisotropic superconductivity and magnetism, leading to possible new physics and applications.


Magnetic resonance studies of defects in electron-irradiated ZnO substrates

Son, N. T.*; Ivanov, I. G.*; Kuznetsov, A. Yu.*; Svensson, B. G.*; Zhao, Q. X.*; Willander, M.*; 森下 憲雄; 大島 武; 伊藤 久義; 磯谷 順一*; et al.

Physica B; Condensed Matter, 401-402, p.507 - 510, 2007/12

 被引用回数:3 パーセンタイル:80.59(Physics, Condensed Matter)



Recombination centers in as-grown and electron-irradiated ZnO substrates

Son, N. T.*; Ivanov, G.*; Kuznetsov, A.*; Svensson, B. G.*; Zhao, Q. X.*; Willander, M.*; 森下 憲雄; 大島 武; 伊藤 久義; 磯谷 順一*; et al.

Journal of Applied Physics, 102(9), p.093504_1 - 093504_5, 2007/11

 被引用回数:16 パーセンタイル:43.87(Physics, Applied)

室温にて3MeV電子線照射したZnO中に発生する欠陥をODMR(Optical detection of magnetic resonance)を用いて調べた。その結果、キャリアの再結合中心として働くZn空孔に起因する欠陥及びその他幾つかの空孔型欠陥が観測された(LU1$$sim$$LU6センター)。また、電子線未照射のZnOに関しても併せてODMR測定を行ったところ、電子線照射ZnOで観測された欠陥のうち、Zn空孔及びその他の空孔に起因する欠陥であるLU3及びLU4センターが観測された。このことから、LU3及びLU4センターはキャリア再結合中心として働く真性欠陥であることが結論できた。


Experimental progress on zonal flow physics in toroidal plasmas

藤澤 彰英*; 井戸 毅*; 清水 昭博*; 岡村 昇一*; 松岡 啓介*; 井口 春和*; 浜田 泰司*; 中野 治久*; 大島 慎介*; 伊藤 公孝*; et al.

Nuclear Fusion, 47(10), p.S718 - S726, 2007/10

 被引用回数:86 パーセンタイル:4.38(Physics, Fluids & Plasmas)



Experimental progress on zonal flow physics in toroidal plasmas

藤澤 彰英*; 井戸 毅*; 清水 昭博*; 岡村 昇一*; 松岡 啓介*; 浜田 泰司*; 星野 克道; 永島 芳彦*; 篠原 孝司; 中野 治久*; et al.

Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM), 12 Pages, 2007/03



Experimental study on $$K$$$$_{alpha}$$ X-ray emission from intense femtosecond laser-solid interactions

Xu, M. H.*; Chen, L.-M.; Li, Y.-T.*; Yuan, X.-H.*; Liu, Y.-Q.*; 中島 一久; 田島 俊樹; Wang, Z.-H.*; Wei, Z.-Y.*; Zhao, W.*; et al.

Acta Physica Sinica, 56(1), p.353 - 358, 2007/01



Nucleation and growth in bulk metallic glass under high pressure investigated using ${it in situ}$ X-ray diffraction

Wang, W. H.*; Wen, P.*; Zhao, D. Q.*; Pan, M. X.*; 岡田 卓; 内海 渉

Applied Physics Letters, 83(25), p.5202 - 5204, 2003/12

 被引用回数:19 パーセンタイル:39.19(Physics, Applied)



Melting and crystallization of Nd$$_{60}$$Al$$_{10}$$Fe$$_{20}$$Co$$_{10}$$ bulk metallic glass under high pressure

Zhao, D. Q.*; Pan, M. X.*; Wang, W. H.*; Wei, B. C.*; 岡田 卓; 内海 渉

Journal of Physics; Condensed Matter, 15(50), p.L749 - L753, 2003/12

 被引用回数:9 パーセンタイル:67.02(Physics, Condensed Matter)



Effect of pressure on nucleation and growth in the ZrTiCuNiBe bulk glass forming alloy investigated using in situ X-ray diffraction

Wang, W. H.*; 岡田 卓; Wen, P.*; Wang, X. L.*; Pan, M. X.*; Zhao, D. Q.*; 内海 渉

Physical Review B, 68(18), p.184105_1 - 184105_6, 2003/11

 被引用回数:29 パーセンタイル:22.23(Materials Science, Multidisciplinary)



Formation and crystallization of CuZrHfTi bulk metallic glass under ambient and high pressures

Wang, Z. X.*; Zhao, D. Q.*; Pan, M. X.*; Wang, W. H.*; 岡田 卓; 内海 渉

Journal of Physics; Condensed Matter, 15(35), p.5923 - 5932, 2003/09

 被引用回数:24 パーセンタイル:26.38(Physics, Condensed Matter)


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