Appearance of a Domain Structure and Its Electronic States in Iron Doped 1T-TaS2 Observed Using Scanning Tunneling Microscopy and Spectroscopy

作者：Fujisawa Yuita^*; Shimabukuro Tatsunari; Kojima Hiroyuki; Kobayashi Kai; Ohta Shun; Machida Tadashi; Demura Satoshi; Sakata Hideaki

来源：Journal of the Physical Society of Japan, 2017, 86(11): 113703.

DOI：10.7566/JPSJ.86.113703

In this paper, we report on scanning tunneling microscopy and spectroscopy (STM/STS) measurements on iron doped 1T-Ta1-xFexS2. A novel domain structure composed of the domains with localized nature divided by the walls is observed in Ta0.99Fe0.01S2, where the Mott transition is completely suppressed. This indicates that the melting of the Mott state accompanies the appearance of the domain structure. Since the number of walls increase in superconducting Ta0.98Fe0.02S2, the domain walls seem to be responsible for superconductivity in iron doped 1T-TaS2.

• 出版日期2017-11-15
• 单位RIKEN