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，制备了原子层控制的半导体与磁性材料的混合结构。它的目标是研究这些纳米结构中界面上的微观磁相互作用和磁光功能，并开发具有新的光学自旋功能的杂化纳米材料。主要研究结果如下：(1)利用反铁磁MnSe原子层的磁性三角掺杂外延生长了锌镉镉量子阱。研究了这种原子层控制超薄膜的磁自旋，阐明了其与激子的关系。(2)用电子束曝光法制备了含Co丝的锌镉锰Se量子阱的杂化纳米结构。由于Co中的铁磁性自旋波和Mn离子的自旋反转，观察到了光散射。因此，在这种磁性杂化纳米结构中，Co的局域有效磁场分布被量化。(3)制备了非磁性半导体锌镉硒和磁性半导体锌镉锰硒量子阱耦合的磁性不对称双量子阱，并用磁场中圆极化时间分辨荧光光谱研究了激子自旋动力学。观察到第二类转变是由依赖于自旋的磁场引起的。这实现了一种新的光学自旋功能，可以在空间上分离空穴自旋。(4)利用电子束光刻技术，新开发了具有垂直磁性Co/Pt多层膜的磁性半导体材料ZnCdMnSe量子阱的混合纳米盘结构。利用Co的垂直磁化产生的局域垂直磁场，成功地控制了半导体纳米盘中的激子自旋态。(5)在具有隧道势垒的磁性半导体ZnCdMnSe量子点与自组装量子点的混合量子结构中，发展了一种光学自旋功能。

项目成果

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

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

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

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。