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Structural, elastic and electronic band structure properties of A-15 type Nb-based intermetallic compounds Nb3B (B = Os, Pt, Au) have been revisited using first principles calculations based on the density functional theory (DFT). All these…

Materials Science · Physics 2018-12-05 M. I. Naher , F. Parvin , A. K. M. A. Islam , S. H. Naqib

We report high-resolution, bulk Compton scattering measurements unveiling the Fermi surface of an optimally-doped iron-arsenide superconductor, Ba(Fe$_{0.93}$Co$_{0.07}$)$_2$As$_2$. Our measurements are in agreement with first-principles…

Electronic correlations were long suggested not only to be responsible for the complexity of many novel materials, but also to form essential prerequisites for their intriguing properties. Electronic behavior of iron-based superconductors…

Motivated by the report of superconductivity in bilayer La$_3$Ni$_2$O$_7$ at high pressure, we examine the interacting electrons in this system. First-principles many-body theory is utilized to study the normal-state electronic properties.…

Strongly Correlated Electrons · Physics 2023-12-04 Frank Lechermann , Jannik Gondolf , Steffen Bötzel , Ilya M. Eremin

The AV3Sb5 (A = K, Rb, Cs) kagome materials host an interplay of emergent phenomena including superconductivity, charge density wave states, and non-trivial electronic structure topology. The band structures of these materials exhibit a…

Materials Science · Physics 2024-07-15 Aurland K. Watkins , Dirk Johrendt , Vojtech Vlcek , Stephen D. Wilson , Ram Seshadri

We report high resolution angle-resolved photoemission spectroscopy (ARPES) studies of the electronic structure of BaFe$_2$As$_2$, which is one of the parent compounds of the Fe-pnictide superconductors. ARPES measurements have been…

Lamellar structures of transition metal phosphorus trisulfides possess strong intralayer bonding, albeit adjacent layers are held by weak van der Waals interactions. Those compounds received enormous interest due to their unique combination…

The electronic structure of In$_{2-x}$V$_x$O$_3$ ($x=0.08$) has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The V $2p$ core-level PES and XAS spectra revealed trivalent electronic state…

Tunneling between two parallel, two-dimensional electron gases (2DEGs) in a complex oxide heterostructure containing a large, mobile electron density of ~ 3x10^14 cm^-2 is used to probe the subband structure of the 2DEGs.…

Mesoscale and Nanoscale Physics · Physics 2013-11-26 Santosh Raghavan , S. James Allen , Susanne Stemmer

Resonant inverse photoemission spectra of Ni metal have been obtained across the Ni 3$p$ absorption edge. The intensity of Ni 3$d$ band just above Fermi edge shows asymmetric Fano-like resonance. Satellite structures are found at about 2.5…

Strongly Correlated Electrons · Physics 2009-11-10 Y. Tezuka , K. Kanai , H. Ishii , S. Shin , S. Nozawa , A. Tanaka , T. Jo

The electronic band structure of complex nanostructured semiconductors has a considerable effect on the final electronic and optical properties of the material and, ultimately, on the functionality of the devices incorporating them. Valence…

We present an investigation on electronic structure of 1T-TiTe2 material via high-resolution angle-resolved photoemission spectroscopy (ARPES), utilizing tunable photon energy excitations. The typical semimetal-like electronic structure is…

Strongly Correlated Electrons · Physics 2019-03-27 Xiao-Fang Tang , Yu-Xia Duan , Fan-Ying Wu , Shu-Yu Liu , Chen Zhang , Yin-Zou Zhao , Jiao-Jiao Song , Yang Luo , Qi-Yi Wu , Jun He , H. Y. Liu , Wen Xu , Jian-Qiao Meng

Low energy electron diffraction (LEED) experiments, LEED simulations and finite slab density functional calculations are combined to study the cleavage surface of Co doped BaFe_{2-x}Co_{x}As_{2} (x = 0.1, 0.17). We demonstrate that the…

We compute the electronic band structure and optical properties of boron arsenide using the relativistic quasiparticle self-consistent $GW$ approach, including electron-hole interactions through solution of the Bethe-Salpeter equation. We…

Materials Science · Physics 2019-06-07 John Buckeridge , David O. Scanlon

The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic structure of a parent compound of the newly…

We report the electronic structure of a prototypical valence fluctuation system, YbAl2, using angle-resolved photoemission spectroscopy. The observed band dispersions and Fermi surfaces are well described in terms of band structure…

Strongly Correlated Electrons · Physics 2015-06-11 M. Matsunami , T. Hajiri , H. Miyazaki , M. Kosaka , S. Kimura

Kondo systems are usually described by the interaction of strong correlation induced local moment with the highly itinerant conduction electrons. Here, we study the role of electron correlations among conduction electrons in the electronic…

Strongly Correlated Electrons · Physics 2015-05-14 Swapnil Patil , Sudhir Pandey , V. R. R. Medicherla , R. S. Singh , R. Bindu , E. V. Sampathkumaran , Kalobaran Maiti

Magnetic ordering of the first row transition metal intercalates of NbS$_2$ due to coupling between the conduction electrons and the intercalated ions has been explained in terms of Fermi surface nesting. We use angle-resolved photoelectron…

Strongly Correlated Electrons · Physics 2007-07-19 C. Battaglia , H. Cercellier , L. Despont , C. Monney , M. Prester , H. Berger , L. Forro , M. G. Garnier , P. Aebi

Angle-resolved photoelectron spectroscopy is used for a detailed study of the electronic structure of the topological insulator Bi2Se3. Nominally stoichiometric and calcium-doped samples were investigated. The pristine surface shows the…

We report an angle-resolved photoemission spectroscopy investigation of the Fermi surface and electronic band structure of BaCo$_{2}$As$_2$. Although its quasi-nesting-free Fermi surface differs drastically from that of its Fe-pnictide…

Strongly Correlated Electrons · Physics 2013-02-12 N. Xu , P. Richard , A. van Roekeghem , P. Zhang , H. Miao , W. -L. Zhang , T. Qian , M. Ferrero , A. S. Sefat , S. Biermann , H. Ding
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