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We examine the interdependence of structural and electronic properties of two substituted pyrene crystals by means of combined spectroscopic probes and density-functional theory calculations. One derivative features n-hexyl side groups,…

We present the c-axis optical reflectance measurement on single crystals of BaFe$_2$As$_2$ and SrFe$_2$As$_2$, the parent compounds of FeAs based superconductors. Different from the ab-plane optical response where two distinct energy gaps…

Superconductivity · Physics 2013-05-29 Z. G. Chen , T. Dong , R. H. Ruan , B. F. Hu , B. Cheng , W. Z. Hu , P. Zheng , Z. Fang , X. Dai , N. L. Wang

To accelerate development of innovative materials, their modelings and predictions with useful functionalities are of vital importance. Here, based on a recently developed crystal structure prediction method, we find a new family of stable…

Materials Science · Physics 2019-04-12 Kisung Chae , Young-Woo Son

Indium Sulphide (InS) single crystals are successfully grown by In flux. Single crystal X-ray diffraction shows orthorhombic structure of Pnnm space group. Ellipsometry measurements performed on the (010) oriented crystal exhibit low…

Semimetallic tungsten ditelluride (WTe2) displays an extremely large non-saturating magnetoresistance (XMR), which is the subject of intense interest. This phenomenon is thought to arise from the combination of perfect n-p charge…

If magnetic semiconductors are ever to find wide application in real spintronic devices, their magnetic and electronic properties will require tailoring in much the same way that band gaps are engineered in conventional semiconductors.…

Materials Science · Physics 2007-05-23 Steven C. Erwin , Igor Zutic

We study the electronic structure of Ta2NiSe5 in its low-temperature semiconducting phase, using resonant inelastic x-ray scattering (RIXS) at the Ta L3 edge. We also investigate the electronic properties of Ta2NiSe5 within the…

Strongly Correlated Electrons · Physics 2024-12-23 D. A. Kukusta , L. V. Bekenov , A. N. Yaresko , K. Ishii , T. Takayama , H. Takagi , V. N. Antonov

Thin films of CdTe were deposited on glass substrates by thermal evaporation. From the XRD measurements itis found that the films are of zinc-blende-type structure. Transmittance, absorption, extinction, and refractive coefficients are…

Materials Science · Physics 2009-11-11 S. Lalitha , S. Zh. Karazhanov , P. Ravindran , S. Senthilarasu , R. Sathyamoorthy , J. Janabergenov

The crystal structure of the superconductor FeSe0.44Te0.56 was redetermined by high-resolution X-ray single crystal diffraction at 173 K (anti-PbO-type, P4/nmm, a=3.7996(2), c=5.9895(6) A, R1=0.022, wR2=0.041, 173 F^2). Significantly…

Superconductivity · Physics 2010-02-24 Marcus Tegel , Catrin Loehnert , Dirk Johrendt

The multiband nature of iron-pnictide superconductors is one of the keys to the understanding of their intriguing behavior. The electronic and magnetic properties heavily rely on the multiband interactions between different electron and…

Superconductivity · Physics 2015-12-02 S. Kong , D. Y. Liu , S. T. Cui , S. L. Ju , A. F. Wang , X. G. Luo , L. J. Zou , X. H. Chen , G. B. Zhang , Z. Sun

A comprehensive study of the structural, electronic, and optical properties of lead-free perovskites has been carried out by means of first principles method based on DFT. The calculations are performed for the compound of the type A2BX6…

Materials Science · Physics 2020-04-24 M. Faizan , K. C. Bhamu , S. H. Khan , G. Murtaza , Xin He

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…

Materials Science · Physics 2013-09-13 M. G. Brik

Crystal structures and microstructural features, such as structural phase transitions, defect structures, chemical and structural inhomogeneities, are known to have profound effects on the physical properties of superconducting materials.…

Superconductivity · Physics 2013-07-22 Wang Zhen , Cai Yao , Yang Huai-Xin , Tian Huan-Fang , Wang Zhi-Wei , Ma Chao , Chen Zhen , Li Jian-Qi

When a crystal becomes thinner and thinner to the atomic level, peculiar phenomena discretely depending on its layer-numbers (n) start to appear. The symmetry and wave functions strongly reflect the layer-numbers and stacking order, which…

Structural and electronic properties of the alpha- and gamma-phases of cerium sesquisulfide, Ce2S3, are examined by first-principles calculations using the GGA+U extension of density functional theory. The strongly correlated f-electrons of…

Materials Science · Physics 2007-05-23 Rene Windiks , Erich Wimmer , Leonid Pourovskii , Silke Biermann , Antoine Georges

We report the growth of single crystals of SrCu2As2, SrCu2Sb2, SrCu2(As{0.84}Sb{0.16})2 and BaCu2Sb2 using the self-flux technique and their structural, magnetic, thermal and transport properties that were investigated by powder x-ray…

Superconductivity · Physics 2012-09-11 V. K. Anand , P. Kanchana Perera , Abhishek Pandey , R. J. Goetsch , A. Kreyssig , D. C. Johnston

Layered indium selenides ($In_{2}Se_{3}$) have recently been discovered to host robust out-of-plane and in-plane ferroelectricity in the $\alpha$ and $\beta$' phases, respectively. In this work, we utilise angle-resolved photoelectron…

Birefringence ($\Delta n$) is the dependence of the refractive index of a material on the polarization of light travelling through it. Birefringent materials are used as polarizers, waveplates, and for novel light-matter coupling. While…

Materials Science · Physics 2025-07-24 Gwan Yeong Jung , Guodong Ren , Pravan Omprakash , Jayakanth Ravichandran , Rohan Mishra

The full potential linearized augmented plane wave (FLAPW) method was used to study the crystal structure and electronic structure properties of PbFe0.5Nb0.5O3 (PFN). The optimized crystal structure, density of states, band structure and…

Materials Science · Physics 2009-11-10 Yuan Xu Wang , C L Wang , M L Zhao , J L Zhang

High quality WSe2 films have been grown on bilayer graphene (BLG) with layer-by-layer control of thickness using molecular beam epitaxy (MBE). The combination of angle-resolved photoemission (ARPES), scanning tunneling…