Appearance of a Domain Structure and Its Electronic States in Iron Doped 1T-TaS2 Observed Using Scanning Tunneling Microscopy and Spectroscopy
Appearance of a Domain Structure and Its Electronic States in Iron Doped 1T-TaS2 Observed Using Scanning Tunneling Microscopy and Spectroscopy
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DOI：
10.7566/jpsj.86.113703
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发表时间：
2017-10
影响因子：
1.7
通讯作者：
Y. Fujisawa;T. Shimabukuro;H. Kojima;K. Kobayashi;S. Ohta;T. Machida;S. Demura;H. Sakata
中科院分区：
文献类型：
--
作者：
Y. Fujisawa;T. Shimabukuro;H. Kojima;K. Kobayashi;S. Ohta;T. Machida;S. Demura;H. Sakata
在本文中，我们报告的扫描隧道显微镜和光谱（STM/STS）测量铁掺杂的1 T-Ta 1 − xFexS 2。在Ta_（0.99）Fe_（0.01）S_2中观察到一种由畴壁分隔的局域畴结构，Mott转变被完全抑制。这表明Mott态的熔化伴随着畴结构的出现。由于在超导Ta_（0.98）Fe_（0.02）S_2中畴壁的数目增加，因此畴壁似乎是掺杂铁的1 T-Ta_2中的超导电性的原因。
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.