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Related papers: The electronic structure of the Na$_x$CoO$_2$ surf…

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Ab initio calculations and angle-resolved photoemission experiments show that the bulk and surface electronic structure of Weyl semimetal candidate MoTe$_2$ changes significantly by tuning the chemical potential by less than 0.4 eV.…

Using LDA+GTB (local density approximation+generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high-$T_c$ material Sm$_{2-x}$Ce$_{x}$CuO$_4$. Parameters of the minimal tight-binding model for…

Strongly Correlated Electrons · Physics 2009-12-03 M. M. Korshunov , E. V. Zakharova , I. A. Nekrasov , Z. V. Pchelkina , S. G. Ovchinnikov

We study the Fermi surface of metallic, non-magnetic \textit{ortho}-II YBa$_2$Cu$_3$O$_{6.5}$ using three different density-functional-based band-structure techniques (GGA, GGA+U, PSIC). The calculated Fermi surface exhibits no pockets in…

Superconductivity · Physics 2009-11-13 Danilo Puggioni , Alessio Filippetti , Vincenzo Fiorentini

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

The electronic structure of surfaces plays a key role in the properties of quantum devices. However, surfaces are also the most challenging to simulate and engineer. Here, we study the electronic structure of InAs(001), InAs(111), and…

We present the first angle-resolved photoemission (ARPES) measurement of Fermi Surface in the "misfit" cobaltate [Bi2Ba2O4].[CoO2]~2. This compound contains the same triangular Co planes as Na cobaltates, but in a different 3D environment.…

Strongly Correlated Electrons · Physics 2009-11-13 V. Brouet , A. Nicolaou , M. Zacchigna , A. Tejeda , L. Patthey , S. Hebert , W. Kobayashi , H. Muguerra , D. Grebille

Density functional calculations are used to investigate the doping dependence of the electronic structure and magnetic properties in hexagonal Na$_x$CoO$_2$. The electronic structure is found to be highly two dimensional, even without…

Superconductivity · Physics 2009-11-10 D. J. Singh

The electronic structures of UX$_3$ (X=Al, Ga, and In) were studied by photoelectron spectroscopy to understand the relationship between their electronic structures and magnetic properties. The band structures and Fermi surfaces of UAl$_3$…

We investigate the electronic structure of CaFe$_2$As$_2$ using high resolution photoemission spectroscopy. Experimental results exhibit three energy bands crossing the Fermi level making hole pockets around the $\Gamma$-point. Temperature…

Superconductivity · Physics 2014-04-03 G. Adhikary , D. Biswas , N. Sahadev , R. Bindu , N. Kumar , S. K. Dhar , A. Thamizhavel , K. Maiti

The electronic structure of the Cr(001) surface with its sharp resonance at the Fermi level is a subject of controversial debate of many experimental and theoretical works. To date, it is unclear whether the origin of this resonance is an…

Strongly Correlated Electrons · Physics 2016-05-12 M. Schüler , S. Barthel , M. Karolak , A. I. Poteryaev , A. I. Lichtenstein , M. I. Katsnelson , G. Sangiovanni , T. O. Wehling

Fermi surfaces, three-dimensional (3D) abstract interfaces that define the occupied energies of electrons in a solid, are important for characterizing and predicting the thermal, electrical, magnetic, and optical properties of crystalline…

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…

We use angle-resolved photoemission spectroscopy and full-potential linearized augmented-plane-wave (FP-LAPW) calculations to study the electronic structure of BaCo2As2. The Fermi surface (FS) maps and the corresponding band dispersion data…

Superconductivity · Physics 2017-03-21 R. S. Dhaka , Y. Lee , V. K. Anand , D. C. Johnston , B. N. Harmon , Adam Kaminski

We have studied the electronic structure of EuFe2As2-xPx using high resolution angle-resolved photoemission spectroscopy. Upon substituting As with the isovalent P, which leads to a chemical pressure and to superconductivity, we observe a…

We report density functional calculations of the electronic structure and Fermi surface of the BaFe$_2$As$_2$ and LiFeAs phases including doping via the virtual crystal approximation. The results show that contrary to a rigid band picture,…

Superconductivity · Physics 2008-09-19 D. J. Singh

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…

We have performed angle-resolved photoemission spectroscopy (ARPES) measurements and first-principles electronic structure calculations on the electron-doped high-Tc superconductors Ln1.85Ce0.15CuO4 (Ln = Nd, Sm, and Eu). The observed Fermi…

Superconductivity · Physics 2009-07-17 M. Ikeda , T. Yoshida , A. Fujimori , M. Kubota , K. Ono , Hena Das , T. Saha-Dasgupta , K. Unozawa , Y. Kaga , T. Sasagawa , H. Takagi

There exists presently considerable debate over the question whether local Coulomb interactions can explain the absence of the small e'_g Fermi surface hole pockets in photoemission studies of Na_{0.3}CoO_2. By comparing dynamical mean…

Strongly Correlated Electrons · Physics 2009-11-13 A. Liebsch , H. Ishida

We perform an orthogonal basis tight binding fit to an LAPW calculation of paramagnetic Na$_x$CoO$_2$ for several dopings. The optimal position of the apical oxygen at each doping is resolved, revealing a non-trivial dependence of the band…

Superconductivity · Physics 2009-11-10 M. D. Johannes , D. A. Papaconstantopoulos , D. J. Singh , M. J. Mehl

We measured the electronic structure of an iron arsenic parent compound LaFeAsO using angle resolved photoemission spectroscopy (ARPES). By comparing with a full-potential Linear Augmented PlaneWave calculation we show that the extra large…