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Ultrafast optical spectroscopy is used to study the antiferromagnetic f-electron system USb2. We observe the opening of two charge gaps at low temperatures (<45 K), arising from renormalization of the electronic structure. Analysis of our…

We have investigated the electronic structure of LaFeAsO$_{1-x}$F$_{x}$ (x = 0; 0.1; 0.2) by angle-integrated photoemission spectroscopy and local density approximation (LDA) based band structure calculations. The valence band consists of a…

The electronic structure of ThPd$_2$Al$_3$, which is isostructural to the heavy fermion superconductor UPd$_2$Al$_3$, was investigated by photoelectron spectroscopy. The band structure and Fermi surfaces of ThPd$_2$Al$_3$ were obtained by…

Strongly Correlated Electrons · Physics 2022-04-06 Shin-ichi Fujimori , Yukiharu Takeda , Hiroshi Yamagami , Jiří Pospíšil , Etsuji Yamamoto , Yoshinori Haga

The first angle-resolved photoemission spectroscopy results from MgB$_2$ single crystals are reported. Close to the $\Gamma$K and $\Gamma$M directions, three distinct dispersions are observed approaching the Fermi energy, as can be assigned…

Superconductivity · Physics 2016-08-31 H. Uchiyama , K. M. Shen , S. Lee , A. Damascelli , D. H. Lu , D. L. Feng , Z. -X. Shen , S. Tajima

We present density functional theory (DFT) calculations and a full set of X-ray spectra (resonant inelastic X-ray scattering and X-ray photoelectron spectra) measurements of single crystal CaFe2As2. The experimental valence band spectra are…

The electronic structures of element cerium under high pressure remain unclear all the time. We tried to calculate the electronic structures of $\alpha'$, $\alpha"$, and $\epsilon$-Ce which only exist in the presence of pressure, by using…

Strongly Correlated Electrons · Physics 2018-11-02 Haiyan Lu , Li Huang

The self-interaction corrected (SIC) local spin-density approximation (LSD) is used to investigate the groundstate valency configuration of the actinide ions in the actinide mono-carbides, AC (A = U, Np, Pu, Am, Cm), and the actinide…

Strongly Correlated Electrons · Physics 2009-04-29 L. Petit , A. Svane , Z. Szotek , W. M. Temmerman , G. M. Stocks

A systematic first-principle study is performed to calculate the lattice parameters, electronic structure, and thermodynamic properties of UN using the local-density approximation (LDA)+\emph{U} and the generalized gradient approximation…

Materials Science · Physics 2015-05-19 Yong Lu , Bao-Tian Wang , Rong-Wu Li , Hongliang Shi , Ping Zhang

The temperature-dependent evolution pattern of 5f electrons helps to elucidate the long-standing itinerant-localized dual nature in plutonium-based compounds. In this work, we investigate the correlated electronic states of PuIn3 dependence…

Strongly Correlated Electrons · Physics 2021-05-26 Haiyan Lu , Li Huang

Electronic structures of single crystalline black phosphorus were studied by state-of-art angleresolved photoemission spectroscopy. Through high resolution photon energy dependence measurements, the band dispersions along out-of-plane and…

Materials Science · Physics 2015-06-16 C. Q. Han , M. Y. Yao , X. X. Bai , Lin Miao , Fengfeng Zhu , D. D. Guan , Shun Wang , C. L. Gao , Canhua Liu , Dong Qian , Y. Liu , Jin-feng Jia

We report the electronic structure of monoclinic CuO as obtained from first principles calculations utilizing density functional theory plus effective Coulomb interaction (DFT + U) method. In contrast to standard DFT calculations taking…

Strongly Correlated Electrons · Physics 2014-02-19 C. E. Ekuma , V. I. Anisimov , J. Moreno , M. Jarrell

The structural properties of the uranium-encapsulated nano-cage U@Au14 are predicted using density functional theory. The presence of the uranium atom makes the Au14 structure more stable than the empty Au14-cage, with a triplet ground…

Atomic and Molecular Clusters · Physics 2013-12-30 Yang Gao , Xing Dai , Seung-gu Kang , Camilo Andres Jimenez Cruz , Minsi Xin , Yan Meng , Jie Han , Zhigang Wang , Ruhong Zhou

The surface and electronic structure of MOCVD-grown layers of Ga(0.92)In(0.08)N have been investigated by means of photoemission. An additional feature at the valence band edge, which can be ascribed to the presence of In in the layer, has…

We report the bulk sensitive Hard X-ray (hv=5.95keV) core level photoemission spectroscopy to investigate the intrinsic electronic structure of strained (La0.85Ba0.15)MnO3 thin films. In a 20nm thick well-strained film with strongly…

Non-resonant inelastic x ray scattering (NIXS) experiments have been performed to probe the 5d-5f electronic transitions at the uranium O(4,5) absorption edges in uranium dioxide. For small values of the scattering vector q, the spectra are…

Strongly Correlated Electrons · Physics 2013-12-19 R. Caciuffo , G. van der Laan , L. Simonelli , T. Vitova , C. Mazzoli , M. A. Denecke , G. H. Lander

The bulk and surface electronic structure of MoAlB(010) is studied by a combination of angle-resolved photoemission spectroscopy and density functional calculations. The observed bulk Fermi-level crossings agree with the previously reported…

We have performed x-ray photoemission spectroscopy on the system of noncentrosymmetric superconductor, Li$_2$(Pd$_x$Pt$_{1-x}$3)B. For Li$_2$Pt$_3$B, we found 2 major peaks with 2 other weak components, and the band calculations were in…

The correlated-band theory implemented as a combination of the local-density approximation with the dynamical mean-field theory is applied to PuO2. An insulating electronic structure, consistent with the experimental valence-band…

Strongly Correlated Electrons · Physics 2015-03-24 Jindrich Kolorenc , Agnieszka L. Kozub , Alexander B. Shick

We report high-resolution hard x-ray photoemission spectroscopy results on (Ga,Mn)As films as a function of Mn doping. Supported by theoretical calculations we identify, over the entire 1% to 13% Mn doping range, the electronic character of…

In heavy-fermion compounds, the dual character of $f$ electrons underlies their rich and often exotic properties like fragile heavy quasipartilces, variety of magnetic orders and unconventional superconductivity. 5$f$-electron actinide…

Strongly Correlated Electrons · Physics 2019-09-13 Q. Y. Chen , X. B. Luo , D. H. Xie , M. L. Li , X. Y. Ji , R. Zhou , Y. B. Huang , W. Zhang , W. Feng , Y. Zhang , X. G. Zhu , Q. Q. Hao , Q. Liu , L. Huang , P. Zhang , X. C. Lai , Q. Si , S. Y. Tan