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We review topological properties of two series of ternary compounds AMgBi (A=K, RB, Cs) and ABC with a hexagonal ZrBeSi type structure. The first series of materials AMgBi are predicted to be topological critical Dirac semimetals. The…

Materials Science · Physics 2019-06-11 Shengshan Qin , Congcong Le , Xianxin Wu , Jiangping Hu

SrAl2Si2 crystallizes into either a semimetallic, CaAl2Si2-type, \alpha phase or a superconducting, BaZn2P2-type, \beta phase. We explore possible \alpha --Pc;Tc--> \beta transformations by employing pressure- and temperature-dependent…

SnxSey crystalline compounds consisting of Sn and Se atoms of varying composition are systematically investigated at pressures from 0 to 100 GPa using the first-principles evolutionary crystal structure search method based on density…

Materials Science · Physics 2017-09-25 Kien Nguyen-Cong , Joseph M. Gonzalez , Brad A. Steele , Ivan I. Oleynik

For the Sn$_2$P$_2$S$_6$ crystalline compound with a rich temperature--pressure phase diagram that contains the ferroelectric phase, semiconductor-to-metal transition, and superconductive state, \mbox{\textit{ab initio}} molecular dynamics…

We report synthesis, characterization, and physical properties of layered bismuth-sulfide compounds La2O2Bi3-xPb1+xS6. We synthesized a new La2O2Bi3PbS6 compound, whose crystal structure is similar to those of the La2O2Bi3AgS6…

Developing efficient anode materials with low electrode voltage, high specific capacity and superior rate capability is urgently required on the road to commercially viable sodium-ion batteries (SIBs). Aiming at finding a new SIB anode…

Materials Science · Physics 2019-07-16 Song-Hyok Choe , Chol-Jun Yu , Kum-Chol Ri , Jin-Song Kim , Un-Gi Jong , Yun-Hyok Kye , Song-Nam Hong

Experimental measurements clearly reveal the presence of bulk superconductivity in the CsPbxBi4-xTe6 (0.3=<x=<1.0) materials, i.e. the first member of the thermoelectric series of Cs[PbmBi3Te5+m], these materials have the layered…

Superconductivity · Physics 2015-12-09 R. X. Zhang , H. X. Yang , H. F. Tain , G. F. Chen , S. L. Wu , L. L. Wei , J. Q. Li

The stability of different stoichiometric H$_n$Br ($n$=1-7) compounds under pressure are extensively studied using density functional theory calculations. Five new energetically stable stoichiometries of H$_2$Br, H$_3$Br, H$_4$Br, H$_5$Br,…

Superconductivity · Physics 2015-04-07 Defang Duan , Fubo Tian , Xiaoli Huang , Da Li , Hongyu Yu , Yunxian Liu , Yanbin Ma , Bingbing Liu , Tian Cui

An interesting class of ternary metallic borides, known as the 212 MAX phase borides, is the recent advancement of the MAX phase family. In this article, results from ab-initio calculations on unexplored Ti$_2$PB$_2$, Zr$_2$PbB$_2$, and…

Materials Science · Physics 2022-09-07 M. A. Ali , M. M. Hossain , M. M. Uddin , A. K. M. A. Islam , S. H. Naqib

We report on the synthesis and physical properties of the new ternary intermetallic Ce$_2$Rh$_2$Ga. Its formation and dimorphism have been investigated by powder and single crystal X-ray diffractometry, as well as by differential thermal…

Strongly Correlated Electrons · Physics 2020-05-12 Sergey Nesterenko , Anna Tursina , Mathieu Pasturel , Sindisiwe Xhakaza , André Strydom

Density functional theory (DFT) based first-principles investigations of structural, elastic, electronic band structure, and optical properties of superconducting ternary phosphides (BaM2P2; M = Ni, Rh) have been carried out in this study.…

Materials Science · Physics 2020-04-01 Md. Maruf Mridha , S. H. Naqib

In this paper, we have presented the density functional theory (DFT) based calculations performed within the first-principles pseudopotential method to investigate the physical properties of the newly discovered superconductor LaRu2As2 for…

Materials Science · Physics 2017-04-05 M. A. Hadi , M. S. Ali , S. H. Naqib , A. K. M. A. Islam

The structure and ground state electronic structure of the recently synthesized SrPdO$_3$ perovskite [A. Galal {\em et al.}, J. Power Sources, {\bf 195}, 3806 (2010)] have been studied by means of screened hybrid functional and the GW…

Materials Science · Physics 2015-06-18 Jiangang He , Cesare Franchini

Group IV and V monolayers are very crucial 2D materials for their high carrier mobilities, tunable band gaps, and optical linear dichroism. Very recently, a novel group IV-V binary compound, Sn2Bi, has been synthesized on silicon substrate,…

Exploring the chemistry of materials at high pressures has lead to the discovery of previously unknown exotic compounds. Here, we systematically search for all thermodynamically stable Sr-C compounds under pressure (up to 100 GPa) using the…

Materials Science · Physics 2025-06-30 Nikita Rybin , Evgeny Moerman , Pranab Gain , Artem R. Oganov , Alexander Shapeev

We report a theoretical study of Sb2S3, Sb2Se3 and Bi2S3 sesquichalcogenides at hydrostatic pressures up to 60 GPa. We explore the possibility that the R-3m, C2/m, C2/c and Im-3m phases observed in sesquichalcogenides with heavier cations,…

A new ternary intermetallic compound, namely, YbMn2Sb2, has been synthesized and its magnetic and electrical transport properties have been studied in the temperature range of 2 to 300 K. This compound crystallizes in a trigonal, La2O2S…

Materials Science · Physics 2009-11-11 R. Nirmala , S. K. Malik , A. V. Morozkin , K. G. Suresh , H. -D. Kim , J. -Y. Kim , B. -G. Park , S. -J. Oh

We review five years of experimental and theoretical attempts (2020-2025) to enhance the superconducting critical temperature ($\textit{T$_c$}$) of hydrogen-rich compounds by alloying binary superhydrides with additional elements. Despite…

This paper presents the results of an extensive structural search of ternary solids containing lutetium, nitrogen and hydrogen. Based on thousands of thermodynamically stable structures, available online, the convex hull of the formation…

Superconductivity · Physics 2024-12-06 Moritz Gubler , Marco Krummenacher , Jonas A. Finkler , Stefan Goedecker

The In-Sn binary alloy system exhibits several unusual features that challenge crystallographic and thermodynamic expectations. We combine first principles total energy calculation with simple thermodynamic modeling to address two key…

Materials Science · Physics 2024-02-07 Michael Widom