邀请讲座人：Prof. Arun Bansil
简介：Arun Bansil教授是美国东北大学杰出教授，为计算材料科学、组织控制、拓扑绝缘体等方向的著名专家。发表杂志论文300余篇，总被引2万余次，H因子为66。担任东北大学Advanced Scientific Computation Center主任、ELMO Innovative curriculum development实验室主任、曾任东北大学物理系主任。承担了美国能源部BES计算凝聚态物理项目组长，负责管理凝聚态物理项目。现任J. Physic and Chemistry of Solids杂志编辑，为Handbook of Topological Materials专著主编。
【报告题目】Topological Insulators, Novel Superconductors and Ultra-Thin Films Beyond Graphene
时间:9:00-10:00 am, Jun. 29th, 2018 地点:新材料大楼材料学院第一会议室
摘要：I will discuss some of our recent work aimed at understanding the electronic structure and spectroscopy of novel superconductors, topological materials, and atomically thin 2D films beyond graphene. Illustrative examples will include: (i) How by exploiting electronic structure techniques we have been able to predict and understand the characteristics of many new classes of binary, ternary and quaternary topologically interesting materials, including topological crystalline insulators and Weyl semi-metal phases; (ii) How atomically thin ‘beyond graphene’ 2D and layered materials offer exciting new possibilities for manipulating electronic structures and novel platforms for fundamental science studies and applications; (iii) With regard to the high-Tc’s, I will discuss recent breakthroughs in modeling the insulating pristine compounds and the transition from the insulating to the metallic state with doping without invoking any free parameters.
邀请讲座人：Prof. Rama Bansil
【报告题目】Kinetics of order-order and order-disordertransitions in block copolymers
时间:10:00-11:00 am, Jun. 29th, 2018 地点:新材料大楼材料学院第一会议室
简介：Rama Bansil教授是美国波士顿大学物理学、材料科学与工程教授，为聚合物凝聚态物理、材料计算等领域的著名专家。发表杂志论文100余篇。研究受到美国国家自然科学基金的资助。现任美国物理学会Fellow，曾在哈佛大学任Bunting Fellow。担任美国国家自然科学基金MRSEC计划项目主任。
摘要：Block copolymers are known to form micelles of different shapes in selective solvents that preferentially dissolve one of the constituent blocks. These micellar fluids exhibit various ordered and disordered phases. To gain microscopic insight into the mechanisms involved in the transformation between different phases we use synchrotron-based time-resolved small angle x-ray scattering (SAXS) following rapid change in temperature or pressure. In this talk I will describe results on the kinetics of the transformation from the hexagonal packed cylinder (HEX) phase to cubic phases (FCC or BCC) and to a gyroid phase, as well as transitions from ordered cubic phase to disordered micellar fluid. SAXS data was interpreted with a geometrical model for the transformation from cylinders to spheres. Brownian Dynamics simulation for an ABA triblock copolymer in a solvent selective for the A block will also be presented.