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We report the crystal growth and structural, magnetic, conductivity, and specific heat investigations of Rb(1-x)Fe(2-y)Se2 single crystals with varying stoichiometry prepared by self-flux and Bridgman methods. The system exhibits a strongly…

Superconductivity · Physics 2011-11-01 V. Tsurkan , J. Deisenhofer , A. Günther , H. -A. Krug von Nidda , S. Widmann , A. Loidl

Obtaining the electronic structure of the newly discovered iron-based superconductors is the key to understanding the mechanism of their high-temperature superconductivity. We used angle-resolved photoemission spectroscopy (ARPES) to make…

We have systematically investigated the structural property and electrical structures of the transition metal intercalated titanium disulfide compound Fe$_x$TiS$_2$ ($0\leq x\leq0.33$) from angle-resolved photoelectron spectroscopy with…

Materials Science · Physics 2010-08-25 X. Y. Cui , H. Negishi , A. N. Titov , S. G. Titova , M. Shi , L. Patthey

In Sr2IrO4 and Sr3Ir2O7, correlations, magnetism and spin-orbit coupling compete on similar energy scales, creating a new context to study metal-insulator transitions (MIT). We use here Angle-Resolved photoemission to investigate the MIT as…

Strongly Correlated Electrons · Physics 2018-12-13 V. Brouet , L. Serrier-Garcia , A. Louat , L. Fruchter , F. Bertran , P. Le Fevre , J. Rault , A Forget , D. Colson

Altermagnetism is a novel magnetic phase combining characteristics of both antiferromagnetism and ferromagnetic ordering. Despite growing theoretical interest in altermagnetic materials, reports of experimentally verified high Neel…

The ab-plane resistivity of Ba(Fe1-xRux)2As2 (x = 0.00, 0.09, 0.16, 0.21, and 0.28) was studied under nearly hydrostatic pressures, up to 7.4 GPa, in order to explore the T-P phase diagram and to compare the combined effects of…

Superconductivity · Physics 2015-05-30 S. K. Kim , M. S. Torikachvili , E. Colombier , A. Thaler , S. L. Bud'ko , P. C. Canfield

Band structure calculations for Ba_2Cu_3O_4Cl_2 within the local density approximation (LDA) are presented. The investigated compound is similar to the antiferromagnetic parent compounds of cuprate superconductors but contains additional…

Strongly Correlated Electrons · Physics 2009-10-30 H. Rosner , R. Hayn , J. Schulenburg

Magnetization, resistivity and specific heat measurements were performed on the solution-grown, single crystals of six GdT$_2$Zn$_{20}$ (T = Fe, Ru, Os, Co, Rh and Ir) compounds, as well as their Y analogues. For the Gd compounds, the Fe…

Strongly Correlated Electrons · Physics 2009-11-13 Shuang Jia , Ni Ni , G. D. Samolyuk , A. Safa-Sefat , K. Dennis , Hyunjin Ko , G. J. Miller , S. L. Bud'ko , P. C. Canfield

Electronic and magnetic properties of the heavily H-doped LaFeAsO$_{1-x}$H$_x$ $(x\sim0.5 )$ were studied in the framework of the density functional theory combined with the dynamical mean field theory (DFT+DMFT). We found a…

Strongly Correlated Electrons · Physics 2019-06-05 Mehdi Hesani , Ahmad Yazdani , Kourosh Rahimi

The crystal structure, anisotropic electrical resistivity and magnetic susceptibility, as well as specific heat results from single crystals of BaFe2As2, BaNi2As2, and BaFeNiAs2 are surveyed. BaFe2As2 properties demonstrate the equivalence…

The Fermi surfaces (FS's) and band dispersions of EuRh2As2 have been investigated using angle-resolved photoemission spectroscopy. The results in the high-temperature paramagnetic state are in good agreement with the full potential…

Layered SnAs-based Zintl compounds exhibit a distinctive electronic structure, igniting extensive research efforts in areas of superconductivity, topological insulators and quantum magnetism. In this paper, we systematically investigate the…

Two dimensional layered materials exhibit versatile electronic properties in their different phases. The intrinsic electronic properties of these materials can be modulated through doping or intercalation. In this study, we investigated the…

First principles density functional calculations within the local spin density approximation (LSDA) and the generalized gradient approximation (GGA) are reported for pyrochlore Cd$_2$Os$_2$O$_7$ and Cd$_{2}$Re$_{2}$O$_7$. The transition…

Condensed Matter · Physics 2009-11-07 D. J. Singh , P. Blaha , K. Schwarz , J. O. Sofo

Two-dimensional layered electrides possessing anionic excess electrons in the interstitial spaces between cationic layers have attracted much attention due to their promising opportunities in both fundamental research and technological…

Materials Science · Physics 2022-12-13 Shuyuan Liu , Yanwei Luo , Chongze Wang , Hyunsoo Jeon , Yu Jia , Jun-Hyung Cho

The crystallographic and physical properties of polycrystalline and single crystal samples of BaCo2As2 and K-doped Ba{1-x}K{x}Co2As2 (x = 0.06, 0.22) are investigated by x-ray and neutron powder diffraction, magnetic susceptibility chi,…

We have carried out magnetization, heat capacity, electrical and magnetoresistance measurements (2-300 K) for the polycrystalline form of intermetallic compounds, R2RhSi3 (R= Gd, Tb, and Dy), forming in a AlB2 derived hexagonal structure…

Strongly Correlated Electrons · Physics 2020-05-20 Ram Kumar , Kartik K Iyer , P. L. Paulose , E. V. Sampathkumaran

Experimental results that BaIn2As2 and Ca(Sr)In2As2, which are the same class of alkali metal compounds, belong to different structural phases have puzzled the current materials physics community. Here, we investigate the pressure-induced…

Materials Science · Physics 2024-07-04 Wen-Ti Guo , Zhigao Huang , Jian-Min Zhang

We calculate electronic structures of a high-Tc iron-based superconductor Sr2VFeAsO3 by LDA+U method. We assume a checker-board antiferromagnetic order on blocking layers including vanadium and strong correlation in d-orbits of vanadium…

Superconductivity · Physics 2015-05-18 Hiroki Nakamura , Masahiko Machida

The low energy band structure and Fermi surface of the newly discovered superconductor, AxFe2Se2 (A=K,Cs), have been studied by angle-resolved photoemission spectroscopy. Compared with iron pnictide superconductors, AxFe2Se2 (A=K,Cs) is the…

Superconductivity · Physics 2011-04-15 Y. Zhang , L. X. Yang , M. Xu , Z. R. Ye , F. Chen , C. He , J. Jiang , B. P. Xie , J. J. Ying , X. F. Wang , X. H. Chen , J. P. Hu , D. L. Feng