Material Development and Physical Properties of BiS2-Based Layered Compounds

Y Mizuguchi - Journal of the Physical Society of Japan, 2019 - journals.jps.jp
In 2012, we discovered superconductivity in Bi4O4S3 and LaO1− x F x BiS2, whose crystal
structures are composed of alternate stacks of a BiS2-type conduction layer and a blocking …

Recent advances in layered metal chalcogenides as superconductors and thermoelectric materials: Fe‐based and bi‐based chalcogenides

Y Mizuguchi - The Chemical Record, 2016 - Wiley Online Library
Recent advances in layered (Fe‐based and Bi‐based) chalcogenides as superconductors
or functional materials are reviewed. The Fe–chalcogenide (FeCh) family are the simplest …

Bulk Superconductivity Induced by In-Plane Chemical Pressure Effect in Eu0.5La0.5FBiS2−xSex

G Jinno, R Jha, A Yamada, R Higashinaka… - Journal of the Physical …, 2016 - journals.jps.jp
We have investigated the Se substitution effect on the superconductivity of optimally doped
BiS2-based superconductor Eu0. 5La0. 5FBiS2. Eu0. 5La0. 5FBiS2− x Se x samples with x …

Unusual Mixed Valence of Eu in Two MaterialsEuSr2Bi2S4F4 and Eu2SrBi2S4F4: Mössbauer and X-ray Photoemission Spectroscopy Investigations

Z Haque, GS Thakur, R Parthasarathy… - Inorganic …, 2017 - ACS Publications
We have synthesized two new Eu-based compounds, EuSr2Bi2S4F4 and Eu2SrBi2S4F4,
which are derivatives of Eu3Bi2S4F4, an intrinsic superconductor with T c= 1.5 K. They …

Pressure-induced Superconductivity in BiS2-based Superconductors Eu2SrBi2S2.5Se1.5F4

K Ishigaki, J Gouchi, K Torizuka… - Journal of the Physical …, 2024 - journals.jps.jp
BiS2-based superconductor Eu2SrBi2S2. 5Se1. 5F4 has been investigated to clarify
between T c and crystal structure under high-pressure. The electrical resistivity by Cubic …

Interference of the Bloch phase in layered materials with stacking shifts

R Akashi, Y Iida, K Yamamoto, K Yoshizawa - Physical Review B, 2017 - APS
In periodic systems, electronic wave functions of the eigenstates exhibit the periodically
modulated Bloch phases and are characterized by their wave numbers k. We theoretically …

Possible pairing mechanism switching driven by structural symmetry breaking in BiS2-based layered superconductors

A Yamashita, H Usui, K Hoshi, Y Goto, K Kuroki… - Scientific Reports, 2021 - nature.com
Investigation of isotope effects on superconducting transition temperature (T c) is one of the
useful methods to examine whether electron–phonon interaction is essential for pairing …

Strong Bilayer Coupling Induced by the Symmetry Breaking in the Monoclinic Phase of BiS2-Based Superconductors

M Ochi, R Akashi, K Kuroki - Journal of the Physical Society of Japan, 2016 - journals.jps.jp
We perform first-principles band structure calculations for the tetragonal and monoclinic
structures of LaO0. 5F0. 5BiS2. We find that the Bi 6 px, y bands on two BiS2 layers exhibit a …

Coexistence of superconductivity and ferromagnetism in Sr0.5Ce0.5FBiS2-xSex (x = 0.5 and 1.0), a non-U material with Tc < TFM

GS Thakur, G Fuchs, K Nenkov, Z Haque, LC Gupta… - Scientific Reports, 2016 - nature.com
We have carried out detailed magnetic and transport studies of the new Sr0. 5Ce0. 5FBiS2-x
Se x (0.0≤ x≤ 1.0) superconductors derived by doping Se in Sr0. 5Ce0. 5FBiS2. Se …

High-pressure effects on nonfluorinated BiS 2-based superconductors La 1− x M x OBiS 2 (M= Ti and Th)

Y Fang, D Yazici, I Jeon, MB Maple - Physical Review B, 2017 - APS
Layered LnOBiS 2 (where Ln represents a lanthanide element) compounds with Ln= La, Ce,
Pr, Nd, and Yb can be rendered conducting and superconducting via two routes, substitution …