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We present a joint experimental and theoretical study of the superconducting phase of the layered binary silicide BaSi2. Compared with the layered AlB2 structure of graphite or diboride-like superconductors, in the hexagonal structure of…

Using the ab initio approaches, the comparative stability, structural, elastic, and electronic properties of three polymorphs of the superconducting disilicide YIr2Si2, which differ in the atomic configurations of [Ir2Si2] (or [Si2Ir2])…

超导电性 · 物理学 2015-05-28 Igor R. Shein

The structural, electronic, mechanic, vibrational and thermodynamic properties of Ti2SiB which is a hypothetical MAX phase compound, have been investigated using density functional theory calculations. The structural optimization of Ti2SiB…

材料科学 · 物理学 2018-05-15 Aysenur Gencer , Gokhan Surucu

Electronic structure of recently discovered isotypic ternary borides Li$_2$Pd$_3$B and Li$_2$Pt$_3$B, with noncentrosymmetric crystal structures, is studied with a view to understanding their superconducting properties. Estimates of the…

超导电性 · 物理学 2015-06-25 S. K. Bose , E. S. Zijlstra

Employing the first-principles computations based on the density functional theory (DFT), we have investigated the structural, mechanical, electronic, bonding, optical and thermodynamics properties of newly discovered bulk superconductors…

材料科学 · 物理学 2018-02-01 Md. Atikur Rahman , Md. Zahidur Rahaman , Md. Lokman Ali , Md. Shahjahan Ali

Topological superconductors host new states of quantum matter which show a pairing gap in the bulk and gapless surface states providing a platform to realize Majorana fermions. Recently, alkaline-earth metal Sr intercalated Bi2Se3 has been…

Here we report the discovery of the first ternary molybdenum pnictide based superconductor K2Mo3As3. Polycrystalline samples were synthesized by the conventional solid state reaction method. X-ray diffraction analysis reveals a…

超导电性 · 物理学 2018-08-02 Qing-Ge Mu , Bin-Bin Ruan , Kang Zhao , Bo-Jin Pan , Tong Liu , Lei Shan , Gen-Fu Chen , Zhi-An Ren

The elastic, electronic and optical properties of MNNi3 (M= Zn, Sn and Cu) have been calculated using the plane-wave ultrasoft pseudopotential technique which is based on the first-principles density functional theory (DFT) with generalized…

材料科学 · 物理学 2015-05-30 M. A. Helal , A. K. M. A. Islam

The electronic properties of the heavy metal superconductor LaIr3 are reported. The estimated superconducting parameters obtained from physical properties measurements indicate that LaIr3 is a BCS-type superconductor. Electronic band…

Structural, elastic, electronic properties and the features of inter-atomic bonding in hypothetical Ir-based carbides-antiperovskites Ir3MC (M=Ti, Zr, Nb and Ta), as predicted from first-principles calculations, have been investigated for a…

材料科学 · 物理学 2019-04-18 Slava Bannikov , Igor. R. Shein , Dmitry V. Suetin

BaPd2As2 belongs to 122 pnictide group, famous for exhibiting superconductivity at high temperatures and other electronic correlations. Unlike the 122 iron arsenides, BaPd2As2 exhibits superconductivity at low temperature when realized in…

超导电性 · 物理学 2018-10-31 F. Parvin , S. H. Naqib

Since the discovery of pressure-induced superconductivity in the two-leg ladder system BaFe$_2X_3$ ($X$=S, Se), with the 3$d$ iron electronic density $n = 6$, the quasi-one-dimensional iron-based ladders have attracted considerable…

强关联电子 · 物理学 2020-04-22 Yang Zhang , Ling-Fang Lin , Adriana Moreo , Shuai Dong , Elbio Dagotto

The electronic structure and lattice vibrational frequencies of the newly discovered superconductors, LiFeAs and NaFeAs, are calculated within density functional theory. We show that in the vicinity of the Fermi energy, the density of…

超导电性 · 物理学 2009-10-13 R. A. Jishi , H. M. Alyahyaei

We observe superconductivity below a critical temperature TC = 1.8 K in single-crystal Ir3Te8, which also exhibits normal-state diamagnetism and a linear temperature dependence of electrical resistivity for a wide temperature interval, 20 K…

The latest discovery of a new iron-chalcogenide superconductor A$_x$Fe$_{2-y}$Se$_2$(A=K, Cs, Rb, Tl and etc.) has attracted much attention due to a number of its unique characteristics, such as the possible insulating state of the parent…

超导电性 · 物理学 2012-01-04 Daixiang Mou , Lin Zhao , Xingjiang Zhou

Electronic structures of superconducting ternaries: La3Ni4Si4, La3Ni4Ge4, La3Pd4Si4, La3Pd4Ge4, and their non-superconducting counterpart, La3Rh4Ge4, have been calculated employing the full-potential local-orbital method within the density…

超导电性 · 物理学 2014-09-08 M. J. Winiarski , M. Samsel-Czekała

Ternary semiconductor CuYS2 is studied by using the first-principles methods in the density functional theory (DFT) framework. The structural, electronic, optical and elastic properties were calculated at the ambient and elevated…

材料科学 · 物理学 2013-09-13 M. G. Brik

Transition metal oxides display a great variety of quantum electronic behaviours where correlations often play an important role. The achievement of high quality epitaxial interfaces involving such materials gives a unique opportunity to…

First-principles calculations were performed to investigate electronic and elastic properties of the newly discovered 7.5K superconductor: layered Nb2InC. As a result, electronic bands, total and site-projected l- decomposed DOS at the…

超导电性 · 物理学 2010-04-08 I. R. Shein , A. L. Ivanovskii

Motivated by an experimental report of iridate superlattices, we performed first-principle electronic structure calculations for SrIrO$_3$/SrTiO$_3$. Heterostructuring causes SrIrO$_3$ to become Sr$_2$IrO$_4$-like, and the system has the…

强关联电子 · 物理学 2014-07-01 Kang-Hwan Kim , Heung-Sik Kim , Myung Joon Han