| 报告题目 | Quantum transport to multiferroic materials from first principles |
| 报告人 | Prof. REN Wei |
| 报告人单位 | Department of Physics, and International Center of Quantum and Molecular Structures, Shanghai University |
| 报告时间 | 2016-11-18 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室（9004） |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心（ICQD） |
| 报告介绍 | 报告摘要：
Electronic transport of charge and spin can be controlled by external electric and magnetic fields. One of the most remarkable transport phenomena at mesoscale and nanoscale is the universal conductance fluctuation. Due to the quantum interference, the amplitude of such fluctuation stays constant independent of the average conductance and sample details. Based on a variety of nanomaterials, we will show results from perspectives of electrons intrinsic charge and spin properties. Then we discuss multiferroic materials which possess both ferroelectric and magnetic orderings, such that electric field can control magnetic properties and vice versa, magnetic field can control electric properties. Particularly we introduce the formation and characteristic of vortex/domain nanostructures in some perovskite oxides. Computational and theoretical methods employed in these studies will be introduced.
Reference:
[1]“Universal Spin-Hall Conductance Fluctuations in Two Dimensions", Wei Ren, Zhenhua Qiao, Jian Wang, Qingfeng Sun, and Hong Guo, Phys. Rev. Lett. 97, 066603(2006).
[2]“Prediction of the magnetotoroidic effect from atomistic simulations”,
Wei Ren and L. Bellaiche, Phys. Rev.Lett., 107, 127202 (2011).
[3]“Enhanced electric conductivity at ferroelectric vortex cores in BiFeO3”, N. Balke, B. Winchester, W. Ren, Y.H. Chu, A.N. Morozovska, E. Eliseev, M. Huijben, R.K. Vasudevan, V. Nagarajan, P. Maksymovych, J. Britson, S. Jesse, I. Kornev, R. Ramesh, L. Bellaiche, L.Q. Chen, and S. V. Kalinin, Nature Physics, 8, 81 (2012).
[4]“Ferroelectric domains in multiferroic BiFeO3 films under epitaxial strains”, Wei Ren, Yurong Yang, Oswaldo Diéguez, Jorge Íñiguez, Narayani Choudhury, and L. Bellaiche, Phys. Rev. Lett., 110, 187601 (2013).
[5]“Quantum Anomalous Hall Effect in Graphene Proximity-Coupled to an Antiferromagnetic Insulator”, Zhenhua Qiao, Wei Ren, Hua Chen, L. Bellaiche, Zhenyu Zhang, A.H. MacDonald, and Qian Niu, Phys. Rev. Lett., 112, 116404 (2014).
报告人简介：
任伟教授在磁电多铁材料和量子输运领域发表SCI论文100篇，解释了铁电畴壁应变效应、极化涡旋结构调控、自旋霍尔电导涨落等科学问题。（包括10篇Phys. Rev. Lett. ，25篇Phys. Rev. B，3篇Nature子刊，1篇Adv. Mater.，3篇Adv. Funct. Mater.等），被引用总计1700多次。担任Nature Mater., PRL等期刊评审，Sci. Reports编委。主持国家自然科学基金面上项目、上海东方学者、教委曙光计划、科委启明星等项目，并承担科技部青年973、上海市材料基因组工程项目。在上海组织了EEMD2014新兴电子材料和器件物理等多个国际研讨会。2014年主持成立上海大学量子与分子结构国际中心ICQMS。 |
