Scanning tunneling microscopy and angle-resolved photoelectron spectroscopy of phase change materials (A03)

相变材料的扫描隧道显微镜和角分辨光电子能谱（A03）

• 批准号: 202217959
• 金额: --
• 依托单位: II. Physikalisches Institut B - Physik der kondensierten Materie
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/202217959?language=en
• 关键词: Scanning; tunneling; microscopy; angle; resolved

The electronic properties of the prototypical phase change material Ge2Sb2Te5 will be studied in detail with-in the technolgically relevant phases, namely the amorphous and the metastable crystalline one. Photoelec-tron spectroscopy in combination with magnetotransport will be used to track the development of the Fermi surface and its relation to the conductivity after successive switching events with a special emphasis on the role of the topological surface states. Scanning tunneling spectroscopy will be used to pinpoint subsurface defect configurations and their fate during switching using the recently established time resolution of 120 ps.

本文将对典型相变材料Ge2Sb2Te5的电子性能进行详细的研究，研究其与技术相关的非晶相和亚稳晶相。光电子-电子能谱结合磁输运将用于跟踪费米表面的发展及其与连续开关事件后电导率的关系，特别强调拓扑表面态的作用。扫描隧道光谱将用于精确定位地下缺陷结构及其在切换过程中的命运，使用最近建立的120 ps的时间分辨率。