[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大學凝聚態物理博士,國家“973”重大科學研究計劃首席科學家,國家基金委重大研究計劃項目負責人。徐洪起教授于1993 年獲聘到Lund 大學工作至2014年,歷任助理教授 (1995-2001)、副教授 (2001-2003)和教授(2003-2014)。徐洪起教授2010年獲聘入職北京大學,在信息科學技術學院物理電子所任教授,擔任其創建的“半導體納米結構與量子器件”實驗室負責人。從事的科學研究領域包括:半導體納米結構物理與光電性質的實驗與理論研究;納電子學器件與自旋電子學器件的制作、物理與應用研究;新型納米線LED 和光伏器件的原理與制作技術研究等。

  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.