Observation of supermodulation in Lao0.5F0.5BiSe2 by scanning tunneling microscopy and spectroscopy

Satoshi Demura; Naoki Ishida; Yuita Fujisawa; Hideaki Sakata

doi:10.7566/JPSJ.86.113701

Observation of supermodulation in Lao_0.5F_0.5BiSe₂ by scanning tunneling microscopy and spectroscopy

Satoshi Demura, Naoki Ishida, Yuita Fujisawa, Hideaki Sakata

Tokyo University of Science

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We observed the surface and electronic structure of single-crystal LaO_0.5F_0.5BiSe₂ by scanning tunneling microscopy= spectroscopy at 4.2 K. A square lattice composed of Bi atoms was observed at a positive sample bias voltage for the surface prepared by cleavage. At a negative sample bias voltage, a stripe structure along the Bi-Bi directions was observed as in a previous report on NdO_0.7F_0.3BiS₂. Furthermore, we observed a supermodulation along the diagonal directions with a period of about five times the lattice constant. This seems to be indicative of the structural instability of this system rather than the electronic instability attributed to a nesting picture.

Original language	English
Article number	113701
Journal	Journal of the Physical Society of Japan
Volume	86
Issue number	11
DOIs	https://doi.org/10.7566/JPSJ.86.113701
Publication status	Published - 15 Nov 2017
Externally published	Yes

Access to Document

10.7566/JPSJ.86.113701

Cite this

@article{806198014a454b8aae09732c6517083a,

title = "Observation of supermodulation in Lao0.5F0.5BiSe2 by scanning tunneling microscopy and spectroscopy",

abstract = "We observed the surface and electronic structure of single-crystal LaO0.5F0.5BiSe2 by scanning tunneling microscopy= spectroscopy at 4.2 K. A square lattice composed of Bi atoms was observed at a positive sample bias voltage for the surface prepared by cleavage. At a negative sample bias voltage, a stripe structure along the Bi-Bi directions was observed as in a previous report on NdO0.7F0.3BiS2. Furthermore, we observed a supermodulation along the diagonal directions with a period of about five times the lattice constant. This seems to be indicative of the structural instability of this system rather than the electronic instability attributed to a nesting picture.",

author = "Satoshi Demura and Naoki Ishida and Yuita Fujisawa and Hideaki Sakata",

note = "Publisher Copyright: {\textcopyright} 2017 The Physical Society of Japan.",

year = "2017",

month = nov,

day = "15",

doi = "10.7566/JPSJ.86.113701",

language = "English",

volume = "86",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "The Physical Society of Japan",

number = "11",

}

TY - JOUR

T1 - Observation of supermodulation in Lao0.5F0.5BiSe2 by scanning tunneling microscopy and spectroscopy

AU - Demura, Satoshi

AU - Ishida, Naoki

AU - Fujisawa, Yuita

AU - Sakata, Hideaki

PY - 2017/11/15

Y1 - 2017/11/15

N2 - We observed the surface and electronic structure of single-crystal LaO0.5F0.5BiSe2 by scanning tunneling microscopy= spectroscopy at 4.2 K. A square lattice composed of Bi atoms was observed at a positive sample bias voltage for the surface prepared by cleavage. At a negative sample bias voltage, a stripe structure along the Bi-Bi directions was observed as in a previous report on NdO0.7F0.3BiS2. Furthermore, we observed a supermodulation along the diagonal directions with a period of about five times the lattice constant. This seems to be indicative of the structural instability of this system rather than the electronic instability attributed to a nesting picture.

AB - We observed the surface and electronic structure of single-crystal LaO0.5F0.5BiSe2 by scanning tunneling microscopy= spectroscopy at 4.2 K. A square lattice composed of Bi atoms was observed at a positive sample bias voltage for the surface prepared by cleavage. At a negative sample bias voltage, a stripe structure along the Bi-Bi directions was observed as in a previous report on NdO0.7F0.3BiS2. Furthermore, we observed a supermodulation along the diagonal directions with a period of about five times the lattice constant. This seems to be indicative of the structural instability of this system rather than the electronic instability attributed to a nesting picture.

UR - http://www.scopus.com/inward/record.url?scp=85034102136&partnerID=8YFLogxK

U2 - 10.7566/JPSJ.86.113701

DO - 10.7566/JPSJ.86.113701

M3 - Article

AN - SCOPUS:85034102136

SN - 0031-9015

VL - 86

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 11

M1 - 113701

ER -

Observation of supermodulation in Lao_0.5F_0.5BiSe₂ by scanning tunneling microscopy and spectroscopy

Abstract

Access to Document

Other files and links

Fingerprint

Cite this