Magnetic properties and optical spin functionalities of atomically layer-controlled hybrid structures of semiconductors with magnetic materials

磁性材料半导体原子层控制混合结构的磁性和光学自旋功能

• 批准号: 15360002
• 负责人: MURAYAMA Akihiro
• 金额: $ 5.89万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360002/
• 关键词: Nanostructures of diluted magnetic semiconductors; Interface between semiconductors and magnetic materials; Hybrid nanostructures of magnetic materials and semiconductors; Optical spin functionality; Spin dynamics; 半導体・磁性体原子層制御界面

In this research, atomically layer-controlled hybrid structures of semiconductors with magnetic materials are fabricated. It has aimed to research microscopic magnetic interactions at the interfaces and magneto-optical functionalities in these nanostructures, and to develop hybrid nano-materials exhibiting new optical spin functionalities. The following results are obtained.(1) ZnCdSe quantum wells were epitaxially grown with magnetic delta-doping of antiferromagnetic MnSe atomic layers. The magnetic spins of such an atomically layer-controlled ultra-thin film were studied and the correlation with excitons was clarified.(2) Hybrid nanostructures of ZnCdMnSe quantum wells with Co wires were developed by electron-beam lithography. Light scattering were observed due to the ferromagnetic spin waves in Co and the spin flip of the Mn ion. As a result, the local effective magnetic-field-distribution from the Co was quantified in such a magnetic hybrid nanostructure.(3) Magnetic asymmetric double quantum wells were fabricated, where non-magnetic semiconductor ZnCdSe and magnetic semiconductor ZnCdMnSe quantum wells were coupled, and the excitonic spin dynamics was studied by circularly polarized time-resolved PL in magnetic fields. It was observed that the type-II transition was induced by the magnetic field depending on the spin. This realizes a new optical spin functionality to separate spatially the hole spins.(4) Hybrid nano-disk structures of magnetic semiconductor ZnCdMnSe quantum wells with perpendicular magnetic Co/Pt multilayers were newly developed by an electron-beam lithography technique. It succeeded in the control of excitonic spin state in the semiconductor nano-disks by the local perpendicular magnetic fields generated from the perpendicular Co magnetization.(5) A optical spin functionality was developed in hybrid quantum nanostructures of CdSe Self-assembled quantum dots with magnetic semiconductor ZnCdMnSe quantum wells with tunnel barriers.

在这项研究中，制造了半导体的原子层控制的杂种结构。它旨在研究这些纳米结构的界面和磁光功能的微观磁相互作用，并开发出具有新的光学自旋功能的混合纳米材料。 （1）Zncdse量子井是在抗铁磁MNSE原子层的磁性掺杂的外延生长的。研究了这种原子层控制的超薄薄膜的磁旋转，并阐明了与激子的相关性。（2）ZnCDMNSE量子井的杂交纳米结构与CO电线通过电子束石质开发。由于CO中的铁磁自旋波和Mn离子的自旋翻转，观察到光散射。结果，在这种磁混合纳米结构中对CO的局部有效磁场分布进行了定量。（3）制造了磁不对称的双量子孔，在其中与非磁性半导体zncdse和磁性隔离器Zncdmnse量子孔相结合，耦合并通过磁场中的圆极化时间分辨PL研究了激子自旋动力学。观察到II型过渡是由磁场诱导的，具体取决于自旋。这实现了一种新的光学自旋功能，可以在空间上分离孔旋转。（4）由垂直的磁性Co/pt多层通过电子光石岩石术技术新开发的磁性半导体ZnCDMNSE量子孔的混合纳米磁盘结构。它成功地控制了由垂直co磁化产生的局部垂直磁场在半导体纳米磁盘中控制的激发态。半导体ZnCDMNSE量子孔具有隧道屏障。

项目成果

Effect of momentum relaxation on exciton spin dynamics in diluted magnetic semiconductor ZnMnSe/CdSe superlattices

• DOI: 10.1103/physrevb.71.165203
• 发表时间: 2005-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: I. Buyanova;G. Rudko;Weimin M. Chen;K. Kayanuma;A. Murayama;Y. Oka;A. Toropov;S. Sorokin;S. Ivanov

Light scattering study on hybrid structures of Zn_1-x-yCd_xMn_ySe quantum wells with ferromagnetic Co wires

Zn_1-x-yCd_xMn_ySe量子阱与铁磁Co线混合结构的光散射研究

• 发表时间: 2004
• 期刊: Physica Status Solidi (b) 241
• 作者: A.Murayama;A.Murayama;W.M.Chen;K.Kayanuma;A.Murayama;K.Seo;I.A.Buyanova;I.Souma;K.Seo;I.Souma;I.Souma;M.Sakuma;I.Souma;K.Nishibayashi;A.Murayama;K.Nishibayashi;K.Kayanuma;A.Uetake;M.Sakuma
• 通讯作者: M.Sakuma

S.Shirotori, K.Kayanuma, I.Souma, T.Tomita, A.Murayama, Y.Oka: "Magnetic-field-induced switching of spin injection in Zn_<1-x>Mn_xTe/ZnTe double quantum wells"Phys.Stat.Sol.(c). 1. 945-948 (2004)

S.Shirotori、K.Kayanuma、I.Souma、T.Tomita、A.Murayama、Y.Oka：“Zn_<1-x>Mn_xTe/ZnTe 双量子阱中自旋注入的磁场诱导切换”Phys。

Surface Science, Basics and Applications

表面科学、基础知识和应用

• 发表时间: 2004
• 作者: A.Murayama;A.Murayama;W.M.Chen;K.Kayanuma;A.Murayama;K.Seo;I.A.Buyanova;I.Souma;K.Seo;I.Souma;I.Souma;M.Sakuma;I.Souma;K.Nishibayashi;A.Murayama;K.Nishibayashi;K.Kayanuma;A.Uetake;M.Sakuma;S.Shirotori;H.Sakurai;A.Murayama;A.Murayama;W.M.Chen;M.Sakuma;E.Nakayama;Z.H.Chen;M.Sakuma;S.Shirotori;H.Sakurai;E.Nakayama;Z.H.Chen;M.Sakuma;E.Nakayama;S.Shirotori;Z.H.Chen;K.Kayanuma;Z.H.Chen;M.Sakuma;T.Tomita;K.Nishibayashi;I.A.Buyanova;A.Murayama;A.Murayama;I.Aoshima;K.Nishibayashi;T.Asahina;K.Seo;M.Sakuma;T.Koyama;L.H.Bai;H.Xiong;K.Kayanuma;T.Koyama;K.Nishibayashi;A.Murayama;M.Sakuma;T.Tomita;K.Nishibayashi;I.A.Buyanova;A.Murayama;A.Murayama;I.Aoshima;K.Nishibayashi;T.Asahina;K.Seo;M.Sakuma;T.Koyama;L.H.Bai;H.Xiong;K.Kayanuma;T.Koyama;K.Nishibayashi;A.Murayama;A.Murayama;T.Koyama;M.Sakuma;A.Murayama;A.Murayama;T.Asahina;村山明宏;A.Murayama
• 通讯作者: A.Murayama

Magneto-photoluminescence from single quantum structures of diluted magnetic semiconductor fabricated by e-beam lithography

电子束光刻制造的稀释磁性半导体单量子结构的磁光致发光

• 发表时间: 2007
• 期刊: Journal of Luminescence 122-123
• 作者: A. Murayama;H. Hirano;他4名
• 通讯作者: 他4名