TY - JOUR
T1 - Evaluation of Bi defect concentration in LnO1-xFxBiCh2 by scanning tunneling microscopy
AU - Demura, S.
AU - Ishida, N.
AU - Fujisawa, Y.
AU - Sakata, H.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2017/7/26
Y1 - 2017/7/26
N2 - We examined a concentration of Bi defects in layered BiCh2 based superconductors LnO1-xFxBiCh2 (Ln = La, Ce, Nd Ch = S, Se). These materials show superconductivity by electron carrier doping into BiCh2 layer. Since Bi defects affect the carrier concentration directly, an examination of the concentration is important to evaluate an actual carrier concentration. In this paper, the concentration of Bi defects on the BiCh2 layers in BiCh2 based superconductors was evaluated by scanning tunneling microscopy measurements in real space. We found the samples with BiSe2 layers have less Bi defects than those with BiS2 layers. Furthermore, the concentration of Bi defects was found to be almost constant regardless of F concentration and Ln ion.
AB - We examined a concentration of Bi defects in layered BiCh2 based superconductors LnO1-xFxBiCh2 (Ln = La, Ce, Nd Ch = S, Se). These materials show superconductivity by electron carrier doping into BiCh2 layer. Since Bi defects affect the carrier concentration directly, an examination of the concentration is important to evaluate an actual carrier concentration. In this paper, the concentration of Bi defects on the BiCh2 layers in BiCh2 based superconductors was evaluated by scanning tunneling microscopy measurements in real space. We found the samples with BiSe2 layers have less Bi defects than those with BiS2 layers. Furthermore, the concentration of Bi defects was found to be almost constant regardless of F concentration and Ln ion.
UR - http://www.scopus.com/inward/record.url?scp=85028011725&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/871/1/012006
DO - 10.1088/1742-6596/871/1/012006
M3 - Conference article
AN - SCOPUS:85028011725
SN - 1742-6588
VL - 871
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012006
T2 - 29th International Symposium on Superconductivity, ISS 2016
Y2 - 13 December 2016 through 15 December 2016
ER -