Direct observation of a quasiparticle band in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi><mml:mi mathvariant="normal">Ir</mml:mi><mml:msub><mml:mi mathvariant="normal">In</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>: An angle-resolved photoemission spectroscopy study

Fujimori, Shin-ichi; Fujimori, A.; Shimada, Kenya; Narimura, Takamasa; Kobayashi, Kenichi; Namatame, H.; Takeuchi, Masaki; Harima, Hisatomo; Shishido, Hiroaki; Ikeda, Shugo; Aoki, Dai; Tokiwa, Yutaka; Haga, Yoshinori; Ōnuki, Yoshichika

doi:10.1103/physrevb.73.224517

Cited by 51 publications

(51 citation statements)

References 21 publications

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“…Also for this material, de Haas-van Alphen experiments indicated a reasonable f-electron delocalization below 500 mK. 36,54 Recent ARPES experiments 55 indicated the development of a small, itinerant f-electron component along the ⌫-X high-symmetry direction at 10 K. The GGA+ U calculated energy bands for U =3-6 eV do indeed predict a narrow 4f band close E F ͑cf. Fig.…”

Section: Discussionmentioning

confidence: 60%

Probing the electronic structure of pure and dopedCeMIn5(M=Co,Rh<

et al. 2008

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We report calculations of the electric-field gradients ͑EFGs͒ in pure and doped CeMIn 5 ͑M = Co, Rh, and Ir͒ compounds and compare with experiment. The degree to which the Ce 4f electron is localized is treated within various models: the local-density approximation, generalized gradient approximation ͑GGA͒, GGA+ U, and 4f-core approaches. We find that there is a correlation between the observed EFG and whether the 4f electron participates in the band formation or not. We also find that the EFG evolves linearly with Sn doping in CeRhIn 5 , suggesting the electronic structure is modified by doping. In contrast, the observed EFG in CeCoIn 5 doped with Cd changes little with doping. These results indicate that nuclear quadrupolar resonance is a sensitive probe of electronic structure.

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Section: Discussionmentioning

confidence: 60%

Probing the electronic structure of pure and dopedCeMIn5(M=Co,Rh<

et al. 2008

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“…Additionally, recent angle-resolved photoemission experiments on CeIrIn 5 have uncovered significant k dependence in the degree of f-electron character at the Fermi energy. 32 In order to account for the multiple bands crossing the Fermi surface and for the k dependence of V cf we have calculated 1 ͑͒ by taking the optical response to be a convolution of the result for a single hybridization gap value 8 …”

Section: A Momentum Dependent Hybridizationmentioning

confidence: 99%

Optical signatures of momentum-dependent hybridization of the local moments and conduction electrons in Kondo lattices

et al. 2007

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An analysis of the optical properties of heavy fermion compounds is reported. We focus on the 1-1-5 series, where strong deviations of the spectra are seen from the predictions of the periodic Anderson model. Specifically we demonstrate that the differences between the experimental results and the theoretical predictions can be explained by accounting for the momentum dependence of the hybridization between the local moments and the conducting carriers. Furthermore we find correlations between the hybridization strength on a particular band and some properties of the 1-1-5 compounds. These correlations suggest that the momentum dependence of the hybridization has to be taken into account, for an understanding of the electronic properties of these heavy fermion compounds.

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“…The hybridization gap structure in CeCoIn 5 is also centred above the chemical potential (8 meV, see Fig. 3a), which makes access difficult for angleresolved photoemission experiments [43][44][45] -the typical technique used for probing electronic band structure in solids.…”

Section: Research Articlementioning

confidence: 99%

Visualizing heavy fermions emerging in a quantum critical Kondo lattice

Aynajian

Neto

Gyenis

et al. 2012

Nature

205

211

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In solids containing elements with f orbitals, the interaction between f-electron spins and those of itinerant electrons leads to the development of low-energy fermionic excitations with a heavy effective mass. These excitations are fundamental to the appearance of unconventional superconductivity and non-Fermi-liquid behaviour observed in actinide- and lanthanide-based compounds. Here we use spectroscopic mapping with the scanning tunnelling microscope to detect the emergence of heavy excitations with lowering of temperature in a prototypical family of cerium-based heavy-fermion compounds. We demonstrate the sensitivity of the tunnelling process to the composite nature of these heavy quasiparticles, which arises from quantum entanglement of itinerant conduction and f electrons. Scattering and interference of the composite quasiparticles is used to resolve their energy-momentum structure and to extract their mass enhancement, which develops with decreasing temperature. The lifetime of the emergent heavy quasiparticles reveals signatures of enhanced scattering and their spectral lineshape shows evidence of energy-temperature scaling. These findings demonstrate that proximity to a quantum critical point results in critical damping of the emergent heavy excitation of our Kondo lattice system.Comment: preprint version, 26 pages, 6 figures. Supplementary: 15 pages, 14 figure

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Direct observation of a quasiparticle band inCeIrIn5: An angle-resolved photoemission spectroscopy study

Cited by 51 publications

References 21 publications

Probing the electronic structure of pure and dopedCeMIn5(M=Co,Rh<

Probing the electronic structure of pure and dopedCeMIn5(M=Co,Rh<

Optical signatures of momentum-dependent hybridization of the local moments and conduction electrons in Kondo lattices

Visualizing heavy fermions emerging in a quantum critical Kondo lattice

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