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The electronic structure of BaTi2As2O, a parent compound of the newly discovered titanium-based oxypnictide superconductors, is studied by angle-resolved photoemission spectroscopy. The electronic structure shows multi-orbital nature and…

Superconductivity · Physics 2015-06-18 H. C. Xu , M. Xu , R. Peng , Y. Zhang , Q. Q. Ge , F. Qin , M. Xia , J. J. Ying , X. H. Chen , M. Arita , K. Shimada , M. Taniguchi , D. H. Lu , B. P. Xie , D. L. Feng

Two-dimensional materials with a proper band gap and high carrier mobility are urgently desired in the field of nanoelectronics. We propose a novel two-dimensional crystal monolayer $\mathrm{TlP_5}$, which is dynamically and…

Various ternary chalcogenide systems and their properties are one of the hot topics for researchers nowadays. In this article, one of the ternary chalcogenide compounds, CdTl2Te4 is studied including its electronic structures and optical…

Materials Science · Physics 2020-05-11 Aditya Dey

Li2FeSiO4 is an important alternative cathode for next generation Li-ion batteries due to its high theoretical capacity (330 mA h/g). However, its development has faced significant challenges arising from structural complexity and poor…

Materials Science · Physics 2016-11-15 P. Vajeeston , H. Fjellvåg

A new modification of KOs2O6, the representative of a new structural type (Pearson symbol aP18, a=5.5668(1)A, b=6.4519(2)A, c=7.2356(2)A, space group P-1, no.2) was synthesized employing high pressure technique. Its structure was determined…

Superconductivity · Physics 2010-03-03 S. Katrych , Q. F. Gu , Z. Bukowski , N. D. Zhigadlo , G. Krauss , J. Karpinski

SrRh2As2 exhibits structural phase transitions reminiscent to those of BaFe2As2, but crystallizes with three polymorphs derived from the tetragonal ThCr2Si2-type structure. The structure of \alpha-SrRh2As2 is monoclinic with a = 421.2(1)…

Superconductivity · Physics 2012-02-02 V. Zinth , V. Petricek , M. Dusek , D. Johrendt

We present a study of the thermodynamic and physical properties of Ta5Si3 compounds by means of density functional theory based calculations. Among the three different structures (D8m, D8l, D88), the D8l structure (Cr5B3-prototype) is the…

Materials Science · Physics 2015-06-03 Xiaoma Tao , Philippe Jund , Catherine Colinet , Jean-Claude Tedenac

Single crystalline Tl2Ba2Ca2Cu3O10 was studied using electronic Raman scattering. The renormalization of the scattering continuum was investigated as a function of the scattering geometry to determine the superconducting energy gap…

Condensed Matter · Physics 2009-10-22 A. Hoffmann , P. Lemmens , G. Guentherodt , V. Thomas , K. Winzer

First-principle FLAPW-GGA band structure calculations are employed to obtain the structural, electronic properties and chemical bonding picture for two related layered phases, namely, quaternary oxyarsenides LaZnAsO and YZnAsO. These…

Materials Science · Physics 2008-10-16 V. V. Bannikov , I. R. Shein , A. L. Ivanovskii

We present a combined experimental and theoretical study on the quasi-one-dimensional organic conductor (TMTTF)$_2$PF$_6$, and elucidate the variation of its physical properties under pressure. We fully resolve the crystal structure by…

We report a comprehensive electronic structure investigation of the paramagnetic (PM), the large moment antiferromagnetic (LMAF), and the hidden order (HO) phases of URu$_2$Si$_2$. We have performed relativistic full-potential calculations…

Strongly Correlated Electrons · Physics 2015-05-19 P. M. Oppeneer , J. Rusz , S. Elgazzar , M. -T. Suzuki , T. Durakiewicz , J. A. Mydosh

We present first-principles calculations of electronic structures of a class of two-dimensional (2D) honeycomb structures of group-V binary compounds. Our results show these new 2D materials are stable semiconductors with direct or indirect…

Materials Science · Physics 2015-12-11 Yaozhuang Nie , Mavlanjan Rahman , Daowei Wang , Can Wang , Guanghua Guo

We report electronic structure calculations for Ta$_2$PdS$_5$, which is a layered superconductor containing heavy elements and displaying an upper critical field, $H_{c2}(0)$, $\sim$3 times higher than the estimated Pauli limit. We show…

Superconductivity · Physics 2013-11-27 David J. Singh

We report structural, magnetization, electrical resistivity and nuclear- and electron spin resonance data of the complex transition metal oxide In_2VO_5 in which structurally well-defined V-O chains are realized. An itinerant character of…

Strongly Correlated Electrons · Physics 2009-11-13 A. Moller , T. Taetz , N. Hollmann , J. A. Mydosh , V. Kataev , M. Yehia , E. Vavilova , B. Buchner

A detailed reexamination of the (110) surface structure of rutile TiO2 has been carried out using first-principles total-energy methods. This investigation is in response to a recent high-precision LEED-IV measurement revealing certain…

Materials Science · Physics 2009-11-11 Scott J. Thompson , Steven P. Lewis

We present a detailed temperature and frequency dependence of the optical conductivity measured on clean high quality single crystals of URu$_{2}$Si$_{2}$ of $ac$- and $ab$-plane surfaces. Our data demonstrate the itinerant character of the…

Strongly Correlated Electrons · Physics 2016-12-19 N. Bachar , D. Stricker , S. Muleady , K. Wang , J. A. Mydosh , Y. K. Huang , D. van der Marel

First-principles FLAPW-GGA band structure calculations were employed to examine the structural, electronic properties and the chemical bonding picture for four ZrCuSiAs-like Th-based quaternary pnictide oxides ThCuPO, ThCuAsO, ThAgPO, and…

Materials Science · Physics 2011-04-19 V. V. Bannikov , I. R. Shein , A. L. Ivanovskii

The electronic properties of quasi-one-dimensional anatase TiO2 nanostructures, in the form of thin nanowires having (101) and (001) facets, have been systematically investigated using the standard, hybrid density functional and…

Mesoscale and Nanoscale Physics · Physics 2014-07-08 Hatice Unal , Oguz Gulseren , Sinasi Ellialtioglu , Ersen Mete

The AV_nO_{2n+1} mixed valence compounds (n=1, A=Na) are classified as dimerized layered system with strongly interacting d-electrons of vanadium ions. The derived band gaps, energy dispersion relations and density of electronic states are…

Strongly Correlated Electrons · Physics 2019-08-17 V. A. Ivanov , Z. V. Popovic , P. Khuong , V. V. Moshchalkov

We report a first-principles study on the geometric, electronic and magnetic properties of V-doped anatase TiO$_{2}$. The DFT+U (Hubbard coefficient) approach predicts semiconductor band structures for Ti$_{1-x}$V$_{x}$O$_{2}$ (x=6.25 and…

Materials Science · Physics 2007-05-23 Xiaosong Du , Qunxiang Li , Haibin Su , Jinlong Yang