"Checkerboard stripe" electronic state on cleaved surface of NdO0.7F0.3BiS2 probed by scanning tunneling microscopy

Tadashi Machida, Yuita Fujisawa, Masanori Nagao, Satoshi Demura, Keita Deguchi, Yoshikazu Mizuguchi, Yoshihiko Takano, Hideaki Sakata

研究成果: ジャーナルへの寄稿記事査読

42 被引用数 (Scopus)

抄録

We present scanning tunneling microscopy measurements on a cleaved surface of the recently discovered superconductor NdO0.7F0.3BiS2 with a transition temperature (Tc) of 5.1 K. Tunneling spectra at 4.2K (below Tc) and 22K (above Tc) show a large spectroscopic gap (∼40 mV), which is inconsistent with the metallic nature demonstrated in bulk measurements. Moreover, we find two interesting real-space electronic features. The first feature is a "checkerboard stripe" electronic state characterized by an alternating arrangement of two types of nanocluster. In one cluster, one-dimensional electronic stripes run along one Bi-Bi direction, whereas, in the other cluster, the stripes run along the other Bi Bi direction. The second feature is a nanoscale electronic inhomogeneity whose microscopic source seems to be atomic defects on the cleaved surface or dopant F atoms.

本文言語英語
論文番号113701
ジャーナルJournal of the Physical Society of Japan
83
11
DOI
出版ステータス出版済み - 15 11月 2014
外部発表はい

フィンガープリント

「"Checkerboard stripe" electronic state on cleaved surface of NdO0.7F0.3BiS2 probed by scanning tunneling microscopy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル