119 citations · 652 across the 31 of their papers we have counts for
31 papers
Stabilization and high thermoelectric performance of high-entropy-type cubic AgBi(S, Se, Te)2
Asato Seshita, Aichi Yamashita, Takeshi Fujita +6
As thermoelectric generators can convert waste heat into electricity, they play an important role in energy harvesting. The metal chalcogenide AgBiSe2 is one of the high-performanc…
Lattice Anharmonicity in BiS2-Based Layered Superconductor RE(O,F)BiS2 (RE = La, Ce, Pr, Nd)
Fysol Ibna Abbas, Kazuhisa Hoshi, Aichi Yamashita +9
We studied Grüneisen parameter (γG) to investigate lattice anharmonicity in a layered BiS2-based superconductor system REO1-xFxBiS2 (RE = La, Ce, Pr, Nd), where in-plane chemical p…
Observing and modeling the sequential pairwise reactions that drive solid-state ceramic synthesis
Akira Miura, Christopher J. Bartel, Yusuke Goto +11
Solid-state synthesis from powder precursors is the primary processing route to advanced multicomponent ceramic materials. Designing ceramic synthesis routes is usually a laborious…
Structural phase diagram of LaO1-xFxBiSSe: suppression of the structural phase transition by partial F substitutions
Kazuhisa Hoshi, Shunsuke Sakuragi, Takeshi Yajima +5
We have investigated low-temperature crystal structure of BiCh2-based compounds LaO1-xFxBiSSe (x = 0, 0.01, 0.02, 0.03, and 0.5), in which anomalous two-fold-symmetric in-plane ani…
Two-fold symmetry of in-plane magnetoresistance anisotropy in the superconducting states of BiCh2-based LaO0.9F0.1BiSSe single crystal
Kazuhisa Hoshi, Motoi Kimata, Yosuke Goto +5
Recently, two-fold symmetric in-plane anisotropy of the superconducting properties have been observed in a single crystal of BiCh2-based (Ch: S, Se) layered superconductor LaO0.5F0…
Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect
Aichi Yamashita, Rajveer Jha, Yosuke Goto +7
Polycrystalline samples of Sr1-xRExFBiS2 (RE: La, Ce, Pr, Nd, and Sm) were synthesized via the solid-state reaction and characterized using synchrotron X-ray diffraction. Although…
Crystal Structure and Thermoelectric Transport Properties of As-Doped Layered Pnictogen Oxyselenides NdO0.8F0.2Sb1-xAsxSe2
Kota Morino, Yosuke Goto, Akira Miura +3
We report the synthesis and thermoelectric transport properties of As-doped layered pnictogen oxyselenides NdO0.8F0.2Sb1-xAsxSe2 (x < 0.7), which are predicted to show high-perform…
Bulk superconductivity induced by Se substitution in self-doped BiCh2-based compound CeOBiS2-xSex
Ryosuke Kiyama, Yosuke Goto, Kazuhisa Hoshi +7
We report the Se substitution effects on the crystal structure, superconducting properties, and valence states of self-doped BiCh2-based compound CeOBiS2-xSex. Polycrystalline CeOB…
Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-xEuxO2Bi3Ag0.6Sn0.4S6
Rajveer Jha, Yosuke Goto, Ryuji Higashinaka +4
We have investigated the substitution effect of Eu on the superconductivity in La2-xEuxO2Bi3Ag0.6Sn0.4S6. Recently, we reported an observation of superconductivity at 0.5 K in a la…
Enhanced superconductivity by Na doping in SnAs-based layered compound NaSnAs
Hao Yuwen, Yosuke Goto, Rajveer Jha +6
Superconducting transition temperature (Tc) reported in SnAs-based layered compound NaSnAs varies from 1.2 to 1.6 K, implying that its superconductivity is critically sensi…
Effect of Bi Substitution on Thermoelectric Properties of SbSe2-based Layered Compounds NdOFSbBiSe
Yosuke Goto, Akira Miura, Chikako Moriyoshi +2
Although SbSe2-based layered compounds have been predicted to be high-performance thermoelectric materials and topological materials, most of these compounds obtained experimentall…
Efficient Bayesian Inference of Sigmoidal Gaussian Cox Processes
Christian Donner, Manfred Opper
We present an approximate Bayesian inference approach for estimating the intensity of an inhomogeneous Poisson process, where the intensity function is modelled using a Gaussian pr…
Synthesis, Crystal Structure, and Thermoelectric Properties of Layered Antimony Selenides REOSbSe2 (RE = La, Ce)
Yosuke Goto, Akira Miura, Ryosuke Sakagami +4
Inspired by the recent first-principles calculations showing the high thermoelectric performance of layered pnictogen chalcogenides, we experimentally characterise the crystal stru…
Na1-xSn2P2 as a new member of van der Waals-type layered tin pnictide superconductors
Yosuke Goto, Akira Miura, Chikako Moriyoshi +4
Superconductors with a van der Waals (vdW) structure have attracted a considerable interest because of the possibility for truly two-dimensional (2D) superconducting systems. We re…
Evolution of Anisotropic Displacement Parameters and Superconductivity with Chemical Pressure in BiS2-Based REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd)
Yoshikazu Mizuguchi, Kazuhisa Hoshi, Yosuke Goto +4
In order to understand the mechanisms behind the emergence of superconductivity by the chemical pressure effect in REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd), where bulk superconduct…
Synthesis, Crystal Structure, and Physical Properties of New Layered Oxychalcogenide La2O2Bi3AgS6
Yudai Hijikata, Tomohiro Abe, Chikako Moriyoshi +7
We have synthesized a new layered oxychalcogenide La2O2Bi3AgS6. From synchrotron X-ray diffraction and Rietveld refinement, the crystal structure of La2O2Bi3AgS6 was refined using…
Crystal structure, site selectivity, and electronic structure of layered chalcogenide LaOBiPbS3
Y. Mizuguchi, Y. Hijikata, T. Abe +10
We have investigated the crystal structure of LaOBiPbS3 using neutron diffraction and synchrotron X-ray diffraction. From structural refinements, we found that the two metal sites,…
Origin of high piezoelectricity at the morphotropic phase boundary (MPB) in (Pb0.94Sr0.06)(ZrxTi1-x)O3
Ravindra Singh Solanki, Sunil Kumar Mishra, Chikako Moriyoshi +4
In this work, we address the issue of peaking of piezoelectric response at a particular composition in the morphotropic phase boundary (MPB) region of (Pb0.940Sr0.06)(ZrxTi1-x)O3 (…
Intrinsic Phase Diagram of Superconductivity in the BiCh2-based System Without In-plane Disorder
Kouhei Nagasaka, Atsuhiro Nishida, Rajveer Jha +11
We have investigated the crystal structure and physical properties of LaO1-xFxBiSSe to reveal the intrinsic superconductivity phase diagram of the BiCh2-based layered compound fami…
Bi Substitution Effects on Superconductivity of Valence-Skip superconductor AgSnSe2
Yudai Hijikata, Atsuhiro Nishida, Kohei Nagasaka +5
We have synthesized AgSn1-xBixSe2 polycrystalline samples to investigate the effect of partial substitution of mixed-valence Sn by Bi3+ to the superconductivity of the valence-skip…
Synchrotron powder X-ray diffraction and structural analysis of Eu0.5La0.5FBiS2-xSex
K. Nagasaka, G. Jinno, O. Miura +4
Eu0.5La0.5FBiS2-xSex is a new BiS2-based superconductor system. In Eu0.5La0.5FBiS2-xSex, electron carriers are doped to the BiS2 layer by the substitution of Eu by La. Bulk superco…
Improper ferroelectricity in stuffed aluminate sodalites for pyroelectric energy harvesting
Yusaku Maeda, Toru Wakamatsu, Ayako Konishi +6
Ferroelectricity in stuffed aluminate sodalites is demonstrated in the present study. The present results indicate that stuffed aluminate sodalites exhibit excellent performance as…
Compositional and temperature evolution of crystal structure of new thermoelectric compound LaOBiS2-xSex
Y. Mizuguchi, A. Miura, A. Nishida +7
We examined the crystal structure of the new thermoelectric material LaOBiS2-xSex, whose thermoelectric performance is enhanced by Se substitution, by using powder synchrotron X-ra…
An Unconventional Phase Transition in BaAl2O4 Driven by Two Competing Soft Modes
Y. Ishii, S. Mori, Y. Nakahira +4
We investigated the temperature dependence of the superlattice intensity and thermal diffuse scattering intensity of BaAl2O4, which has a network structure with corner-sharing AlO4…