Quantum critical transition from Kondo insulator to metallic state studied by band‐structure calculations for doped compounds: CeRhSb and CeNiSn

Goraus, Jerzy; Ślebarski, A.

doi:10.1002/pssb.201200615

Cited by 6 publications

(4 citation statements)

References 21 publications

(19 reference statements)

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“…substitution of antimony by a group IV element. This has also been tested for the more complex solid solutions CeNi 1−δ Sn 1+δ−x Sb x [299] and CeRhSb 1−x Te x [300].…”

Section: Solid Solutionsmentioning

confidence: 99%

Cerium intermetallics with TiNiSi-type structure

Janka

Niehaus

Pöttgen

et al. 2016

Zeitschrift Für Naturforschung B

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Intermetallic compounds with the equiatomic composition CeTX that crystallize with the orthorhombic TiNiSi-type structure can be synthesized with electronrich transition metals (T) and X = Zn, Al, Ga, Si, Ge, Sn, As, Sb, and Bi. The present review focusses on the crystal chemistry and chemical bonding of these CeTX phases and on their physical properties, 119 Sn and 121 Sb Mössbauer spectra, high-pressure effects, hydrogenation reactions and the formation of solid solutions in order to elucidate structure-property relationships. This paper is the final one of a series of four reviews on equiatomic intermetallic cerium compounds [Part I

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“…substitution of antimony by a group IV element. This has also been tested for the more complex solid solutions CeNi 1−δ Sn 1+δ−x Sb x [299] and CeRhSb 1−x Te x [300].…”

Section: Solid Solutionsmentioning

confidence: 99%

Cerium intermetallics with TiNiSi-type structure

Janka

Niehaus

Pöttgen

et al. 2016

Zeitschrift Für Naturforschung B

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“…In Kondo insulators such as CeNiSn123, CeRhSb23, and Ce 3 Bi 4 Pt 3 4, interesting new physics has been proposed such as the bound states near the Kondo holes56789. With increasing concentrations of doping, an insulator-to-metal transition has been widely observed, accompanying with the change from the dense Kondo lattice regime to the single-ion Kondo regime.…”

mentioning

confidence: 99%

Doping-induced perturbation and percolation in the two-dimensional Anderson lattice

Wei

Yang

2017

Sci Rep

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We examine the doping effects in the two-dimensional periodic Anderson model using the determinant Quantum Monte Carlo (DQMC) method. We observe bound states around the Kondo hole site and find that the heavy electron states are destroyed at the nearest-neighbor sites. Our results show no clear sign of hybridization oscillation predicted in previous mean-field calculations. We further study the electron transport with increasing doping and as a function of temperature and obtain a critical doping xc ≈ 0.6 that marks a transition from the Kondo insulator regime to the single-ion Kondo regime. The value of xc is in good agreement with the predicted threshold for the site percolation. Our results confirm the percolative nature of the insulator-metal transition widely observed in doped Kondo insulators.

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“…Transition from KI in CeRhSb to a metallic state in CeRhSn via the critical point was studied by means of density functional theory (DFT) calculations before [26]. It was shown that QPT is manifested by a change of Mulliken occupation of Ce 5d states as a function of x.…”

Section: Introductionmentioning

confidence: 99%

Studies of electronic structure across a quantum phase transition in CeRhSb1−xSnx

et al. 2019

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We study an electronic structure of CeRhSb 1−x Sn x system, which displays quantum critical transition from a Kondo insulator to a non-Fermi liquid at x = 0.13. We provide ultraviolet photoelectron spectra of valence band obtained at 12.5 K. A coherent peak at the Fermi level is not present in the data, but a signal related to 4f 1 7/2 final state is detected. Spectral intensity at the Fermi edge has a general tendency to grow with Sn content. Theoretical calculations of band structure are realized with full-potential local-orbital minimum-basis code using scalar relativistic and full relativistic approach. The calculations reveal a depletion of density of states at the Fermi level for CeRhSb. This gap is shifted above the Fermi energy with increasing Sn content and thus a rise of density of states at the Fermi level is reflected in the calculations. It agrees with metallic properties of compounds with larger x. The calculations also yield another important effects of Sn substitution. Band structure is displaced in a direction corresponding to hole doping, although with deviations from a rigid band shift scenario. Lifshitz transitions modify a topology of the Fermi surface a few times and a number of bands crossing the Fermi level increases.

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Quantum critical transition from Kondo insulator to metallic state studied by band‐structure calculations for doped compounds: CeRhSb and CeNiSn

Cited by 6 publications

References 21 publications

Cerium intermetallics with TiNiSi-type structure

Cerium intermetallics with TiNiSi-type structure

Doping-induced perturbation and percolation in the two-dimensional Anderson lattice

Studies of electronic structure across a quantum phase transition in CeRhSb1−xSnx

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