刘恩克

简介


2012年毕业于中科院物理所,获凝聚态物理(磁学)博士学位,并获中科院院长奖学金特别奖、中科院百篇优秀博士论文奖。

2012年留所于磁学国家重点实验室工作,2013年入选中科院青年创新促进会,2015年任中科院物理所副研究员。

2016年3月-2018年2月,作为“洪堡学者”赴德国Dresden马普固体化学物理所及Halle马普微结构物理所合作访问,合作导师Claudia Felser和Stuart Parkin教授。

2017年,获得国家基金委“优青”基金(磁相变材料)、中科院青促会优秀会员基金、国家自然科学二等奖。

现任中科院物理所博士生导师。

主要研究方向


磁学与磁性功能材料,包括磁相变材料、磁性拓扑半金属(Semi-metal)、自旋电输运材料、单自旋半金属(Half-metal)等。致力于新材料的设计和实现,注重从晶格、价键、能带、电子、自旋等内禀层面提出材料设计和物性调控的新思想和新方法。

研究中借助于第一性原理电子结构计算、多晶制备、单晶生长、薄膜器件微加工等手段,在Heusler合金、MMX合金、d-metal合金、Shandite化合物等体系中,研究磁场驱动马氏体相变、多卡热效应、高自旋极化、磁性拓扑输运、反常霍尔电输运、反常能斯特热输运、自旋玻璃、应变玻璃、磁交换偏置等物理行为,以及磁性相变与结构相变的耦合,共价杂化与磁性的竞争,温度、脉冲磁场、等静压条件下的磁相变及电输运等行为。

过去的主要工作及获得的成果


  • 在国际上首次实现了磁性外尔半金属(Co3Sn2S2),完成了外尔费米子空间-时间反演对称破缺的物理分类,首次在磁性体系中观测到内禀的巨反常霍尔电导(1100 S/cm)及巨反常霍尔角(20%),为高温量子反常霍尔效应(QAHE)的二维铁磁绝缘体提供了理想的长程、面外、本征铁磁体,将拓扑物理与磁学紧密地关联了起来,推动“拓扑自旋(热)电子学”的快速发展。
  • 基于d-d 弱共价杂化的成键特征,在国际上提出并实现了“(all-d-metal)全过渡族Heusler合金”,打破了传统Heusler合金的成相规律,拓展了Heusler合金的家族成员,并开发出具有中国自主知识产权的新型高强韧磁驱动相变材料。该工作为磁相变领域新材料的设计和丰富物性的调控提供了全新的研究空间。
  • 在国际上发现了六角型MMX磁相变合金的“居里温度窗口”效应,提出了磁相变设计的“等结构合金化”思想,在40-450K的宽温域内获得了连续可调的磁驱相变和巨磁热效应。该方法在磁相变领域相变温度和磁结构同步调控中被广为采用。此研究已成为国家自然科学二等奖的代表性成果之一。
  • 基于MMX合金及all-d-metal合金的磁相变行为,开展了等静压、单轴应力、脉冲强磁场条件下的磁性马氏体相变、压热效应(Baro-caloric)、弹热效应(Elasto-caloric)、磁热效应(Magneto-caloric)等系列研究,观察到了多场驱动相变、多卡热效应,为固态制冷技术的发展提供了多场热耦合调控的重要基础。
  • 已在Science、Nature Physics、Nature Communications、Science Advances、Advanced Materials、Acta Materialia、Advanced Electronic Materials、Physical Review B、Applied Physics Letters等国际期刊上发表SCI论文100余篇,文章总引3400余次。其中,Nature Physics、Science论文在实验上实现了第一个磁性外尔半金属,Nature Commun论文入选ESI高被引论文目录(物理学科,Top1%)。授权国际、中国发明专利各4项。撰写专著章节1节。在国际学术会议及科研机构做邀请报告30余次。担任波兰国家基金委国际评审专家,Nature Communications、Advanced Energy Materials、Applied Physics Letters等国际期刊审稿人。

代表性论文及专利


  1. 1. Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal (Co3Sn2S2).
    Enke Liu*,  Yan Sun*,  Nitesh Kumar,  Lukas Muechler,  Aili Sun,  Lin Jiao,  Shuo-Ying Yang, Defa Liu, Aiji Liang,  Qiunan Xu,  Johannes Kroder,  Vicky Süß,  Horst Borrmann,  Chandra Shekhar, Zhaosheng Wang,  Chuanying Xi,  Wenhong Wang,  Walter Schnelle,  Steffen Wirth,  Yulin Chen,  Sebastian T. B. Goennenwein &  Claudia Felser*
    Nature Physics 14 (2018) 1125-1131. 
  2. 2. Magnetic Weyl semimetal phase in a Kagomé crystal (Co3Sn2S2).
    D. F. Liu, A. J. Liang, E. K. Liu, Q. N. Xu, Y. W. Li, C. Chen, D. Pei, W. J. Shi, S. K. Mo, P. Dudin, T. Kim, C. Cacho, G. Li, Y. Sun, L. X. Yang, Z. K. Liu, S. S. P. Parkin, C. Felser, Y. L. Chen*
    Science 365 (2019) 1282.
  3. 3. Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2.
    Noam Morali, Rajib Batabyal, Pranab Kumar Nag, Enke Liu, Qiunan Xu, Yan Sun, Binghai Yan, Claudia Felser, Nurit Avraham, Haim Beidenkopf
    Science 365 (2019) 1286.
  4. 4. Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2.
    Qiunan Xu, Enke Liu, Wujun Shi, Lukas Muechler, Jacob Gayles, Claudia Felser, and Yan Sun
    Physical Review B 97 (2018) 235416. 
  5. 5. Zero-Field Nernst Effect in a Ferromagnetic Kagome-Lattice Weyl-Semimetal Co3Sn2S2.
    Satya N. Guin, Praveen Vir, Yang Zhang, Nitesh Kumar, Sarah J. Watzman, Chenguang Fu, Enke Liu, Kaustuv Manna, Walter Schnelle, Johannes Gooth, Chandra Shekhar, Yan Sun, Claudia Felser
    Advanced Materials 31 (2019) 1806622.
  6. 6. Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal Co3Sn2S2.
    Lin Jiao, Qiunan Xu, Yeryun Cheon, Yan Sun, Claudia Felser, Enke Liu*, and Steffen Wirth*.
    Physical Review B 99 (2019) 245158
  7. 7. Surface states in bulk single crystal of topological semimetal Co3Sn2S2 toward water oxidation.
    Guowei Li*, Qiunan Xu, Wujun Shi, Chenguang Fu, Lin Jiao, Machteld E. Kamminga, Mingquan Yu, Harun Tüysüz, Nitesh Kumar, Vicky Süß, Rana Saha, Abhay K. Srivastava, Steffen Wirth, Gudrun Auffermann, Johannes Gooth, Stuart Parkin, Yan Sun,*, Enke Liu,* and Claudia Felser*
    Science Advances 5 (2019) eaaw9867.
  8. 8. Stable magnetostructural coupling with tunable magnetoresponsive effects in hexagonal ferromagnets.
    Enke Liu, Wenhong Wang, Lin Feng, Wei Zhu, Guijiang Li, Jinglan Chen, Hongwei Zhang, Guangheng Wu, Chengbao Jiang, Huibin Xu, and Frank de Boer
    Nature Communications 3 (2012) 873. 
  9. 9. An efficient scheme to tailor the magnetostructural transitions by staged quenching and cyclical ageing in hexagonal martensitic alloys.
    Yong Li, Qingqi Zeng, Zhiyang Wei, Enke Liu*, Xiaolei Han, Zhiwei Du, Lingwei Li, Xuekui Xi, Wenhong Wang, Shouguo Wang, Guangheng Wu.
    Acta Materialia, 174 (2019) 289.
  10. 10. Unprecedentedly Wide Curie-Temperature Windows as Phase-Transition Design Platform for Tunable Magneto-Multifunctional Materials.
    Zhiyang Wei, Enke Liu*, Yong Li,  Guizhou Xu,  Xiaoming Zhang,  Guodong Liu, Xuekui Xi,  Hongwei Zhang,  Wenhong Wang,  Guangheng Wu, and Xixiang Zhang
    Advanced Electronic Materials 7 (2015) 1500076.
  11. 11. Transition from Anomalous Hall Effect to Topological Hall Effect in Hexagonal Non-Collinear Magnet Mn3Ga.
    Zhuhong Liu*, Yajiu Zhang, Guodong Liu, Bei Ding, Enke Liu*, Hasnain Mehdi Jafri, Zhipeng Hou, Wenhong Wang, Xingqiao Ma, and Guangheng Wu 
    Scientific Reports 7 (2017) 515.
  12. 12. Realization of multifunctional shape-memory ferromagnets in all-d-metal Heusler phases.
    Zhiyang Wei, Enke Liu*, Jiahua Chen, Yong Li, Guodong Liu, Hongzhi Luo, Xuekui Xi, Hongwei Zhang, Wenhong Wang, and Guangheng Wu
    Applied Physics Letters 107 (2015) 022406.
  13. 13. Magnetostructural martensitic transformations with large volume changes and magneto-strains in all-d-metal Heusler alloys.
    Zhiyang Wei, Enke Liu*, Yong Li, Xiaolei Han, Zhiwei Du, Hongzhi Luo, Guodong Liu, Xuekui Xi, Hongwei Zhang, Wenhong Wang, and Guangheng Wu
    Applied Physics Letters 109 (2016) 071904.
  14. 14. Electronic behaviors during martensitic transformations in all-d-metal Heusler alloys.
    Qingqi Zeng, Jianlei Shen, Hongguo Zhang, Jie Chen, Bei Ding, Xuekui Xi, Enke Liu*, Wenhong Wang, Guangheng Wu.
    Journal of Physics: Condensed Matter 31 (2019) 425401.
  15. 15. Atomic configuration, unusual lattice constant change, and tunable ferromagnetism in all-d-metal Heusler alloys Fe2CrV-FeCr2V.
    Jianlei Shen, Qingqi Zeng, Hongguo Zhang, Xuekui Xi, Enke Liu*, Wenhong Wang, Guangheng Wu.
    Journal of Magnetism and Magnetic Materials 492 (2019) 165661.
  16. 16. Windows open for highly tunable magnetostructural phase transitions.
    Yong Li, Zhiyang Wei, Hongguo Zhang, Enke Liu*, Hongzhi Luo, Guodong Liu, Xuekui Xi, Shouguo Wang, Wenhong Wang, Ming Yue, Guangheng Wu, and Xixiang Zhang
    APL Materials 4 (2016) 071101. 
  17. 17A coupling of martensitic and metamagnetic transitions with collective magneto-volume and table-like magnetocaloric effects.
    Enke Liu, Zhiyang Wei, Yong Li, Guodong Liu, Hongzhi Luo, Wenhong Wang, Hongwei Zhang, and Guangheng Wu
    Applied Physics Letters 105 (2014) 062401.
  18. 18Giant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window.
    Enke Liu, Hongguo Zhang, Guizhou Xu, Xiaoming Zhang, Ruisong Ma, Wenhong Wang, Jinglan Chen, Hongwei Zhang, Guangheng Wu, Lin Feng, and Xixiang Zhang
    Applied Physics Letters 102 (2013) 122405.
  19. 19Vacancy-tuned paramagnetic/ferromagnetic martensitic transformation in Mn-poor Mn1-xCoGe alloys.
    Enke Liu, Wei Zhu, Lin Feng, Jinglan Chen, Wenhong Wang, Guangheng Wu, Heyan Liu, Fanbin Meng, Hongzhi Luo, and Yiangxian Li
    Europhysics Letters 91 (2010) 17003 
  20. 20Coherent tunneling and giant tunneling magnetoresistance in Co2FeAl/MgO/CoFe magnetic tunneling junctions.
    Wenhong Wang, Enke Liu, M. Kodzuka, H. Sukegawa, M. Wojcik, E. Jedryka, Guangheng Wu, K. Inomata, S. Mitani, K. Hono
    Physical Review B 81(R) (2010) 140402
  21. 21A Centrosymmetric Hexagonal Magnet with Superstable Biskyrmion Magnetic Nanodomains in a Wide Temperature Range of 100–340 K.
    Wenhong Wang, Ying Zhang, Guizhou Xu, Licong Peng, Bei Ding, Yue Wang, Zhipeng Hou, Xiaoming Zhang, Xiyang Li,  Enke Liu, Shouguo Wang, Jianwang Cai, Fangwei Wang, Jianqi Li, Fengxia Hu, Guangheng Wu, Baogen Shen, XiXiang Zhang.
    Advanced Materials 28 (2016) 6887
  22. 22Observation of Various and Spontaneous Magnetic Skyrmionic Bubbles at Room Temperature in a Frustrated Kagome Magnet with Uniaxial Magnetic Anisotropy.
    Zhipeng Hou, Weijun Ren, Bei Ding, Guizhou Xu, Yue Wang, Bing Yang, Qiang Zhang, Ying Zhang, Enke Liu, Feng Xu, Wenhong Wang  Guangheng Wu  Xixiang Zhang  Baogen Shen  Zhidong Zhang.
    Advanced Materials 30 (2018) 1706306
  23. 23Electric Field Control of the Magnetocaloric Effect.
    Yuanyuan Gong, Dunhui Wang, Qingqi Cao, Enke Liu, Jian Liu, Youwei Du.
    Advanced Materials 27 (2015) 801
  24. ResearcherID: http://www.researcherid.com/rid/B-8999-2008

目前的研究课题及展望


目前承担国家基金委优青、面上基金,中科院“青促会”人才基金,科技部重点研发计划,北京市基金委重点专题,合肥强磁场科学中心高端用户基金。以理论预测+实验探索为研究方式,坚持磁性功能新材料的设计和实现,并研究其奇异物理行为。于物理与材料的结合部,探索新奇,发现规律。

培养研究生情况


已协助培养硕博研究生多名,每年拟招收硕博连读生或博士研究生1~2人,欢迎具有物理或材料背景的学生联系报考。欢迎相关专业背景的博士后加盟。

其他联系方式


北京中关村南三街8号
中科院物理所M楼 M05组

http://m05.iphy.ac.cn/

电话:

010-82649247

Email

ekliu@iphy.ac.cn