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We study electronic and topographic properties of the vicinal Si(557)-Au surface using scanning tunneling microscopy and reflection of high energy electron diffraction technique. STM data reveal double wire structures along terraces.…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 M. Krawiec , T. Kwapinski , M. Jalochowski

We have constructed microscopic, structurally-relaxed atomistic models of Si/SiO$_2$ superlattices. The structural distortion and oxidation-state characteristics of the interface Si atoms are examined in detail. The role played by the…

Materials Science · Physics 2015-06-24 Pierre Carrier , Laurent J. Lewis , M. W. Chandre Dharma-wardana

High resolution angle-resolved photoemission measurements have been carried out on (Sr,K)Fe$_2$As$_2$ superconductor (Tc=21 K). Three hole-like Fermi surface sheets are clearly resolved for the first time around the Gamma point. The overall…

Hexagonal SiGe is a promising material for combining electronic and photonic technologies. In this work, the energetic, structural, elastic and electronic properties of the hexagonal polytypes (2$H$, 4$H$ and 6$H$) of silicon and germanium…

Locally noncentrosymmetric CeRh$_{2}$As$_{2}$ exhibits characteristic two-phase unconventional $H$--$T$ superconducting phase diagram. The transition from even- to odd-parity superconducting phase is supported by the P4/nmm crystal…

Superconductivity · Physics 2023-11-03 Konrad Jerzy Kapcia , Andrzej Ptok

Ge$_{1-x}$Fe$_{x}$ (Ge:Fe) shows ferromagnetic behavior up to a relatively high temperature of 210 K, and hence is a promising material for spintronic applications compatible with Si technology. We have studied its electronic structure by…

Recent high-pressure x-ray diffraction studies of alkali metals revealed unusual complex structures that follow the body-centered and face-centered cubic structures on compression. The structural sequence of potassium under compression to 1…

Materials Science · Physics 2013-10-18 V F Degtyareva , O Degtyareva

The electronic structure of layered Sr$_{3}$Ru$_{2}$O$_{7}$ in its orthorhombic structure is investigated using density functional calculations. The band structure near the Fermi energy, consists of Ru $% t_{2g}$ states hybridized with O…

Superconductivity · Physics 2009-10-31 D. J. Singh , I. I. Mazin

We theoretically study, through combining the density functional theory and an unfolding technique, the electronic band structure and the charge doping effects for the deposition of potassium (K) on multilayer FeSe films grown on SrTiO3…

Mesoscale and Nanoscale Physics · Physics 2016-02-24 Fawei Zheng , Li-Li Wang , Qi-Kun Xue , Ping Zhang

In this paper, we investigate the topological properties of ZrRuP and ScPd$_{3}$ using the first-principles calculations. We calculate the electronic structure, surface states, and Z$_{2}$ topological invariant. The band structure of ZrRuP…

Materials Science · Physics 2018-01-10 Armindo S. Cuamba , Hong-Yan Lu , Lei Hao , C. S. Ting

We present a detailed electronic structure study of the non-centrosymmetric superconductor BiPd based on our angle resolved photoemission spectroscopy (ARPES) measurements and Density Functional Theory (DFT) based calculations. We observe a…

Superconductivity · Physics 2023-10-31 H. Lohani , P. Mishra , Anurag Gupta , V. P. S. Awana , B. R. Sekhar

Rare-earth platinum bismuth (RPtBi) has been recently proposed to be a potential topological insulator. In this paper we present measurements of the metallic surface electronic structure in three members of this family, using angle resolved…

Spin-filtered time-of-flight photoelectron momentum microscopy reveals a systematic variation of the band structure within a series of highly spin-polarized ferromagnetic Heusler compounds with increasing number of valence electrons…

Materials Science · Physics 2021-02-10 S. Chernov , C. Lidig , O. Fedchenko , M. Jourdan , G. Schönhense , H. J. Elmers

We report electronic structure calculations for BaTi$_2$Sb$_2$O and discuss the results in relation to the observed superconductivity of this material when hole doped with Na. The Fermi surface shows several sheets. These include a nested…

Superconductivity · Physics 2012-12-10 D. J. Singh

Topological semimetals such as Weyl or Dirac semimetals with superconductivity have emerged as a new class of topological materials to realize and study Majorana Fermion. This article reports the Density Functional Theory (DFT) calculated…

Superconductivity · Physics 2022-09-13 N. K. Karn , M. M. Sharma , V. P. S. Awana

We studied the low-lying electronic structure of the newly discovered iron-platinum-arsenide superconductor, Ca10(Pt4As8)(Fe2-xPtxAs2)5 (Tc=22 K) with angle-resolved photoemission spectroscopy. We found that the Pt4As8 layer contributes to…

Superconductivity · Physics 2013-08-15 X. P. Shen , S. D. Chen , Q. Q. Ge , Z. R. Ye , F. Chen , H. C. Xu , S. Y. Tan , X. H. Niu , Q. Fan , B. P. Xie , D. L. Feng

We use scanning tunneling spectroscopy to investigate the filled and empty electronic states of superconducting single-unit-cell FeSe deposited on SrTiO$_3$(001). We map the momentum-space band structure by combining quasiparticle…

Surface-bound porphyrins are promising candidates for molecular switches, electronics and spintronics. Here, we studied the structural and the electronic properties of Fe-tetra-pyridil-porphyrin adsorbed on Au(111) in the monolayer regime.…

Mesoscale and Nanoscale Physics · Physics 2020-12-22 Arnulf Stein , Daniela Rolf , Christian Lotze , Constantin Czekelius , Katharina J. Franke , Petra Tegeder

The study of magnetism in two-dimensional materials has garnered significant interest, driven by fundamental investigations into low-dimensional magnetic phenomena and their potential for applications in spintronic devices. Through…

Strongly Correlated Electrons · Physics 2025-08-18 Yuanji Xu , Xintao Jin , Haoyuan Tang , Fuyang Tian

The electronic structure of the recently synthesised (3x3) reconstructed silicene on (4x4) Ag(111) is investigated by first-principles calculations. New states emerge due to the strong hybridization between silicene and Ag. Analyzing the…

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