[中關村論壇]尋找馬約拉納費米子
主講人:徐洪起
2015-05-19
文章來源:

  中關村論壇第269期

  日期:2015.4.22

  原標題:Current Development in the Experimental Search for Majorana Fermions in Solid State

[video:20150422-中關村論壇269期-徐洪起]

  報告人簡介

  徐洪起,瑞典Lund大学凝聚态物理博士,国家“973”重大科学研究计划首席科学家,国家基金委重大研究计划项目负责人。徐洪起教授于1993 年获聘到Lund 大学工作至2014年,历任助理教授 (1995-2001)、副教授 (2001-2003)和教授(2003-2014)。徐洪起教授2010年获聘入职北京大学,在信息科学技术学院物理电子所任教授,担任其创建的“半导体纳米结构与量子器件”实验室负责人。从事的科学研究领域包括:半导体纳米结构物理与光电性质的实验与理论研究;纳电子学器件与自旋电子学器件的制作、物理与应用研究;新型纳米线LED 和光伏器件的原理与制作技术研究等。

  徐洪起教授是2006至2009年瑞典國家研究基金委工程物理委員會的委員,2012至2014年瑞典國家研究基金委半導體物理、電子學與光電子學委員會的委員。徐洪起教授還從2001年起受聘擔任歐盟科技專家,是多個國家和地區研究項目評審專家。

  報告摘要:

  The search for Majorana fermions in solid state systems is one of paramount research tasks in modern physics today. Majorana fermions are an elusive class of fermions that are their own antiparticles. Although an extensive effort has been made worldwide in particle physics, Majorana fermions have so far not been convincingly discovered in free space. In recent years, numerous theoretical proposals for probing Majorana fermion states in solid state systems have been suggested, ranging from exploring ν = 5/2 fractional quantum Hall systems, to exploring chiral p-wave superconductor systems, and to exploring hybrid systems of topological insulator thin films in contact to s-wave superconductors. The most recent proposals are to explore the topological superconducting phase of a strong spin?orbit coupled semiconductor nanowire in the proximity of an s-wave superconductor. These proposals have stimulated waves of search for Majorana fermions in solid state. In this colloquium talk, the current achievements in the experimental search for Majorana fermions in solid state systems will be reviewed. A view of future experimental directions in the pursuit of Majorana fermions in solid state systems will also be presented and discussed.