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We study a stochastic variability of SS433 in the $10^{-4} - 5\times 10^{-2}$ Hz frequency range based on RXTE data, and on simultaneous observations with RXTE and optical telescopes. We find that the cross-correlation functions and power…

High Energy Astrophysical Phenomena · Physics 2014-10-31 Kirill Atapin , Sergei Fabrika , Aleksei Medvedev , Alexander Vinokurov

The improved resolution of laser-based angle-resolved photoemission spectroscopy (ARPES) allows reliable access to fine structures in the spectrum. We present a systematic, doping-dependent study of a recently discovered low-energy kink in…

We present a theory for the photon energy and polarization dependence of ARPES intensities from the CuO$_2$ plane in the framework of strong correlation models. We show that for electric field vector in the CuO$_2$ plane the `radiation…

Strongly Correlated Electrons · Physics 2013-05-29 C. Dahnken , R. Eder

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

Recent angle-resolved photoemission spectroscopy (ARPES) experiments on La$_{2.85}$Pr$_{0.15}$Ni$_2$O$_7$ thin films have revealed a superconducting gap near the diagonal direction for the $d_{x^2-y^2}$ orbital, confined to a narrow…

Superconductivity · Physics 2025-08-08 Junkang Huang , Tao Zhou

The evolution of electron correlation in Sr$_{x}$Ca$_{1-x}$VO$_3$ has been studied using a combination of bulk-sensitive resonant soft x-ray emission spectroscopy (RXES), surface-sensitive photoemission spectroscopy (PES), and ab initio…

Strongly Correlated Electrons · Physics 2013-07-25 J. Laverock , B. Chen , K. E. Smith , R. P. Singh , G. Balakrishnan , M. Gu , J. W. Lu , S. A. Wolf , R. M. Qiao , W. Yang , J. Adell

Angle-resolved photoemission spectroscopy (ARPES) is one of the most direct methods of studying the electronic structure of solids. By measuring the kinetic energy and angular distribution of the electrons photoemitted from a sample…

Strongly Correlated Electrons · Physics 2009-11-10 Andrea Damascelli

We have analysed the XMM-Newton spectra of SS 433 using a standard model of adiabatically and radiatively cooling X-ray jets. The multi-temperature thermal jet model reproduces well the strongest observed emission line fluxes. The thermal…

High Energy Astrophysical Phenomena · Physics 2015-05-14 A. Medvedev , S. Fabrika

Using angle-resolved photoemission, we have investigated the development of the electronic structure and the Fermi level pinnning in Ga$_{1-x}$Mn$_{x}$As with Mn concentrations in the range 1--6%. We find that the Mn-induced changes in the…

Materials Science · Physics 2009-11-07 H. Asklund , L. Ilver , J. Kanski , J. Sadowski , R. Mathieu

Data from angle resolved photo-emission spectroscopy (ARPES) often serves as a smoking-gun evidence for the existence of topological materials. It provides the energy dispersion curves of the topological boundary modes which characterize…

Mesoscale and Nanoscale Physics · Physics 2015-12-08 Zohar Ringel

It is anticipated that mass accretion rates exceeding approximately $10^{19}\,{\rm g\,s^{-1}}$ in X-ray pulsars lead to radiation-driven outflows from super-critical accretion discs. The outflows launched from the disc influence the angular…

High Energy Astrophysical Phenomena · Physics 2025-09-16 Sricheta Karmakar , Alexander A. Mushtukov , Matthew Middleton

Recently AMS-02 collaboration publish their measurements of light cosmic-ray nuclei, including lithium, beryllium, boron, carbon and oxygen. All of them reveal a prominent excess above $\sim$ 200 GV, coinciding with proton and helium.…

High Energy Astrophysical Phenomena · Physics 2019-01-09 Wei Liu , Yu-hua Yao , Yi-Qing Guo

Single crystal antiferromagnetic USb2 was studied at 15K by angle-resolved photoemission with an overall energy resolution of 24 meV. The measurements unambiguously show the dispersion of extremely narrow bands situated near the Fermi…

Angle-resolved photoemission spectroscopy (ARPES) is a powerful probe of electron correlations in two-dimensional layered materials. In this Letter we demonstrate that ARPES can be used to probe the onset of exciton condensation in…

Strongly Correlated Electrons · Physics 2013-02-25 Stefan Rist , A. A. Varlamov , A. H. MacDonald , Rosario Fazio , Marco Polini

We explore the interplay of electron-electron correlations and spin-orbit coupling in the model Fermi liquid Sr2RuO4 using laser-based angle-resolved photoemission spectroscopy. Our precise measurement of the Fermi surface confirms the…

We have measured the temperature dependence of the photoemission and x-ray absorption spectra of La$_{1-x}$Sr$_x$FeO$_3$ (LSFO) epitaxial thin films with $x=0.67$, where charge disproportionation ($3{Fe}^{3.67+}\to 2{Fe}^{3+}+ {Fe}^{5+}$)…

Strongly Correlated Electrons · Physics 2007-05-23 H. Wadati , A. Chikamatsu , R. Hashimoto , M. Takizawa , H. Kumigashira , A. Fujimori , M. Oshima , M. Lippmaa , M. Kawasaki , H. Koinuma

Using the tight-binding linear muffin-tin orbitals method, the soft x-ray fluorescence K-emission spectra of boron in MgB_2, excited close to the absorption edge, are estimated. In the calculations the angle of incidence between the…

Superconductivity · Physics 2009-11-10 K. Kokko , V. Kulmala , J. A. Leiro , W. Hergert

We performed a detailed study of the intrinsic electronic structure of YRu2Si2 employing angleresolved photoemission spectroscopy (ARPES) and density-functional theory (DFT) based firstprinciples calculations. Electrical and magnetic…

We use high resolution angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) to investigate the electronic structure of trigonal phase ${\rm PtBi_2}$ (t-${\rm PtBi_2}$), a proposed Weyl semimetal that is…

Mesoscale and Nanoscale Physics · Physics 2025-03-13 Evan O'Leary , Zhuoqi Li , Lin-Lin Wang , Benjamin Schrunk , Andrew Eaton , Paul C. Canfield , Adam Kaminski

Laser angle-resolved photoemission spectroscopy (ARPES) is employed to investigate the temperature (T) dependence of the electronic structure in BaFe2As2 across the magneto-structural transition at TN ~ 140 K. A drastic transformation in…