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Magnetic Ground State of the Ideal Triangular-Lattice Antiferromagnets Tuned by the Inter-layer Inte
Time:2016-12-22

时间:Mon,2016-12-26,13:30-14:30

地点:Room 616,Physics Building

Abstract:

Since the spin-1/2 triangular-lattice antiferromagnet is recognized as an ideal material to study the interplay between frustration, low-dimensionality, and strong quantum fluctuations, this compound has attracted a lot of attention in the past decade. Both neutron diffraction and inelastic neutron scattering measurements were performed on the multi-perovskite(Co-triangular lattice): According to our unpolarized and polarized neutron diffraction measurements, the Co2+ magnetic moments form a 120 degree structure in the easy ab-plane. The intra- and inter-plane exchange interactions were determined by fitting the measured spin-wave dispersion with an S=1/2 XXZ model. Moreover, Ba3CoSb2O9 under the field and Ba8CoNb6O24 will be discussed。

Biography:

2003年毕业于中国科学技术大学材料科学与工程系,获得理学学士学位;2010年于美国衣阿华州立大学天文与物理系获得凝聚态物理学博士学位;2010年至2015年在美国橡树岭国家实验室中子散射中心和田纳西大学天文与物理系担任博士后研究员;2015年入选第十一批“千人计划”青年人才,加入上海交通大学物理与天文系。长期从事凝聚态物理前沿实验研究方面的工作,尤其是运用中子散射及同步辐射X光技术对强关联体系功能材料的晶体结构、声子谱和磁子谱进行研究,探讨材料中电子、磁子、声子和轨道等相互作用及其导致的诸如电荷有序、轨道晶格耦合、自旋晶格相互作用等新奇量子效应和物理现象,以及这些效应对功能材料中各种性能的影响。已在Science, Nature Materials, Nature Nanotechnology, Physical Review Letters, Journal of the American Chemical Society 等国际主流杂志上发表论文36篇。

版权所有:2012年 上海交通大学凝聚态物理研究所    技术支持:上海屹超信息技术有限公司