大学物理B2(2017,2019,2020)

我们课题组长期关注自旋电子学方面的研究，在强关联量子材料、自旋动力学、自旋拓扑物理和量子器件等方面取得了一系列成果。课题组目前的重心集中在基于磁性斯格明子(skyrmion)的拓扑自旋轨道电子学。自从在非中心对称的手性块体磁性材料中被发现以后，斯格明子在凝聚态物理学以及自旋电子学领域引起了非常大的关注。这来源于：1）由于受拓扑保护，斯格明子非常容易被电流的驱动从而被认为是低功耗自旋器件的最佳选择。2）实空间自旋拓扑态的给予了丰富的拓扑输运现象，包括拓扑电荷的霍尔效应，新兴磁电动力学，等效磁单极子等等。

在低维人工磁性异质结中，通过引入界面的反演对称性破缺以及相应的手性磁相互作用，我们研究团队做出了开创性的贡献。包括实现室温下的斯格明子以及它的自旋电流操控，观测到拓扑电荷的霍尔效应。这个领域里还有很多有趣的, 并且具有巨大潜在科技应用价值的拓扑物理现象等待被索。

我们的主要研究手段包括:

1: 时间以及空间分辨的磁光克尔成像技术

2: 低维人工磁性异质结制备技术 (磁控溅射,分子束外延)

3: 自旋相关成像技术 (包括磁力显微镜,洛伦兹透射电子显微镜,自旋极化低

能电子显微镜,以及基于同步辐射的自旋成像技术)

4: 静态,动态自旋输运 (自旋霍尔效应,自旋转矩铁磁共振)

本小组计划每年招收1-2名博士研究生,并常年不定期招收博士后研究人员，欢迎大家一起来探索！

1： 2008年国家优秀自费留学生奖

2： 2010年加拿大总督科研金奖

3： 2012年加州大学洛杉矶分校博士后科研校长奖

在Science, Nature Physics, Nature Materials, Nature Nanotechnology, Nature Electronics, Physics Reports, Physical Review Letters, Physical Review B, Nano Letters等期刊上共发表论文70余篇，总引用6700余次。

课题组研究论文以及引用情况参见google scholar：

https://scholar.google.com/citations?user=J3yWhfAAAAAJ&hl=zh-CN&oi=ao

Selected Publications：

1.Thermal generation, manipulation and thermoelectric detection of skyrmions

Zidong Wang, Minghua Guo, Heng-An Zhou, Le Zhao, Teng Xu, Riccardo Tomasello, Hao Bai, Yiqing Dong, Soong-Geun Je, Weilun Chao, Hee-Sung Han, Sooseok Lee, Ki-Suk Lee, Yunyan Yao, Wei Han, Cheng Song, Huaqiang Wu, Mario Carpentieri, Giovanni Finocchio, Mi-Young Im, Shi-Zeng Lin^*, Wanjun Jiang^*

Nature Electronics 3 (11), 672-679 (2020).

2.Spin-Topology Dependent Brownian Diffusion of Skyrmions

Le Zhao, Zidong Wang, Xichao Zhang, Jing Xia, Keyu Wu, Heng-An Zhou, Yiqing Dong, Guoqiang Yu, Kang L Wang, Xiaoxi Liu, Yan Zhou, Wanjun Jiang^*

Physical Review Letters 125, 027206 (2020).

3.Electrically Reconfigurable 3D Spin‐Orbitronics

Yiqing Dong, Teng Xu, Heng‐An Zhou, Li Cai, Huaqiang Wu, Jianshi Tang, Wanjun Jiang^*

Advanced Functional Materials 31 (9), 2007485 (2021).

4.Observation of unconventional anomalous Hall effect in epitaxial CrTe thin films

Dapeng Zhao, Liguo Zhang, Iftikhar Ahmed Malik, Menghan Liao, Wenqiang Cui, Xinqiang Cai, Cheng Zheng, Luxin Li, Xiaopeng Hu, Ding Zhang, Jinxing Zhang, Xi Chen, Wanjun Jiang^*, Qikun Xue^*

Nano Research, 11, 3116, (2018).

5.Skyrmions in magnetic multilayers

Wanjun Jiang^*, Gong Chen, Kai Liu, Jiadong Zang, Suzanne G. E., te velthuis, Axel Hoffmann

Physics Reports, 703, 1-49 (2017).

6.Direct observation of the skyrmion Hall effect

Wanjun Jiang^*, Xichao Zhang, Guoqiang Yu, Wei Zhang, M. Benjamin Jungfleisch, John E. Pearson, Kang L. Wang, Olle Heinonen, Yan Zhou, Suzanne G. E. te Velthuis^*, and Axel Hoffmann^*

Nature Physics, 13, 162-169 (2017).

7.Mobile Néel skyrmions at room temperature: status and future

Wanjun Jiang^*, Wei Zhang, Guoqiang Yu, M. Benjamin Jungfleisch, Pramey Upadhyaya, Hamoud Somaily, John E. Pearson, Yaroslav Tserkovnyak, Kang L. Wang, Olle Heinonen, Suzanne G. E. te Velthuis^*, and Axel Hoffman^*

AIP Advances, 6, 055602 (2016)

8.Blowing Magnetic Skyrmion Bubbles                                                            

Wanjun Jiang, Pramey Upadhyaya, Wei Zhang, Guoqiang Yu, Benjamin Jungfleisch, Frank Fradin, John Pearson, Yaroslav Tserkovnyak, Olle Heinonen, Kang L. Wang, Suzanne G. E. te Velthuis, and Axel Hoffmann^*

Science, 349, 6245 (2015)

9.Spin Hall effects in metallic antiferromagnets

Wei Zhang^*, Matthias Jungfleisch, Wanjun Jiang, Frank Fradin, John Pearson, Axel Hoffmann, Frank Freimuth and Yuriy Mokrousov

Physical Review Letters, 113, 196602, (2014)

10.Direct Imaging the Thermally Driven Domain Wall Motion in Magnetic Insulators

Wanjun Jiang, Pramey Upadhyaya, Yabin Fan, Minsheng Wang, Mark Lewis, Murong Lang, Kin L. Wong, Yen-Ting Lin, Liang He, Li-Te Chang, Jianshi Tang, Sergiy Cherepov, Xuezhi Zhou, Robert N. Schwartz and Kang L. Wang^*

Physical Review Letters, 110, 177202, (2013)

11.Scaling the Anomalous Hall Effect: A connection between transport and magnetism

Wanjun Jiang^*, Xuezhi Zhou, Gwyn Williams.

Physical Review B, 82, 144424 (2010)

12.Griffiths Phase and Critical Behaviour in Single Crystal La_0.7Ba_0.3MnO₃:

Phase Diagram for La_1-xBa_xMnO₃, x≤0.33

Wanjun Jiang^*, Xuezhi Zhou, Gwyn Williams, Y. M. Mukovskii, and K. Glazyrin

Physical Review B, 77, 064424 (2008)

13.Is a Griffiths Phase a Prerequisite for Colossal Magnetoresistance?

Wanjun Jiang^*, Xuezhi Zhou, Gwyn Williams, Y. M. Mukovskii, and K. Glazyrin.

Physical Review Letters, 99, 177203 (2007)