Coexistence of Antiferromagnetism and Superconductivity in Heavy Fermion Cerium Compound Ce3PdIn11

Kratochvílová, Marie; Prokleška, Ján; Uhlířová, Klára; Tkáč, V.; Dušek, Michal; Sechovský, V.; Custers, J.

doi:10.1038/srep15904

Cited by 29 publications

(45 citation statements)

References 32 publications

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“…On the contrary, the hybridization of different itinerant bands to the 4f states should prevent a strong direct cross talk of the Kondo effect on the different sites. A similar situation might prevail in compounds with different Ce sublattices, for instance in the case of the heavy-fermion systems Ce 3 PdIn 11 33 and Ce 3 PtIn 11 34 , where it is thought that one of the crystallographic Ce sites is responsible for AFM ordering while the second one is responsible for superconductivity. Hence this could be one of the reasons why clear evidence for a cross talk of Kondo effects in such systems is yet lacking.…”

Section: Dispersion Of the Kondo Peakmentioning

confidence: 78%

Unexpected differences between surface and bulk spectroscopic and implied Kondo properties of heavy fermion CeRh2Si2

et al. 2020

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Ultra-violet angle-resolved photoemission spectroscopy (UV-ARPES) was used to explore the temperature dependence of the Ce-4f spectral responses for surface and bulk in the antiferromagnetic Kondo lattice CeRh2Si2. Spectra were taken from Ce- and Si-terminated surfaces in a wide temperature range, and reveal characteristic 4f patterns for weakly (surface) and strongly (bulk) hybridized Ce, respectively. The temperature dependence of the Fermi level peak differs strongly for both cases implying that the effective Kondo temperature at the surface and bulk can be rather distinct. The greatly reduced crystal–electric-field (CEF) splitting at the surface gives reason to believe that the surface may exhibit a larger effective Kondo temperature because of a higher local-moment effective degeneracy. Further, the hybridization processes could strongly affect the 4f peak intensity at the Fermi level. We derived the k-resolved dispersion of the Kondo peak which is also found to be distinct due to different sets of itinerant bands to which the 4f states of surface and bulk Ce are coupled. Overall our study brings into reach the ultimate goal of quantitatively testing many-body theories that link spectroscopy and transport properties, for both the bulk and the surface, separately. It also allows for a direct insight into the broader problem of Kondo lattices with two different local-moment sublattices, providing some understanding of why the cross-talking between the two Kondo effects is weak.

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Section: Dispersion Of the Kondo Peakmentioning

confidence: 78%

Unexpected differences between surface and bulk spectroscopic and implied Kondo properties of heavy fermion CeRh2Si2

et al. 2020

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“…For FeTe/Bi 2 Te 3 heterostructures, our atomic-scale spin-resolved tunnelling spectroscopy measurements provide evidence for the coexistence of superconducting correlations with T c ∼6.5 K and bi-collinear AFM order in the one UC FeTe films. Although the coexistence of static magnetic order and superconductivity was observed earlier by spatially averaging techniques in several systems such as Fe-pnictides3637, heavy fermion compounds38 and Fe-chalcogenides39, the exact microscopic picture of the coexistence still remained unclear because of a lack of spatially resolved data40. Here we can compare the wavelength of the AFM order of λ =2 a =7.5 Å with the size of the Cooper pairs, inferred from the coherence length, of ξ =8.9 Å, giving ξ / λ ∼1.2.…”

Section: Discussionmentioning

confidence: 99%

Interfacial superconductivity in a bi-collinear antiferromagnetically ordered FeTe monolayer on a topological insulator

Manna¹,

Kamlapure²,

Cornils³

et al. 2017

Nat Commun

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The discovery of high-temperature superconductivity in Fe-based compounds triggered numerous investigations on the interplay between superconductivity and magnetism, and on the enhancement of transition temperatures through interface effects. It is widely believed that the emergence of optimal superconductivity is intimately linked to the suppression of long-range antiferromagnetic (AFM) order, although the exact microscopic picture remains elusive because of the lack of atomically resolved data. Here we present spin-polarized scanning tunnelling spectroscopy of ultrathin FeTe1−xSex (x=0, 0.5) films on bulk topological insulators. Surprisingly, we find an energy gap at the Fermi level, indicating superconducting correlations up to Tc∼6 K for one unit cell FeTe grown on Bi2Te3, in contrast to the non-superconducting bulk FeTe. The gap spatially coexists with bi-collinear AFM order. This finding opens perspectives for theoretical studies of competing orders in Fe-based superconductors and for experimental investigations of exotic phases in superconducting layers on topological insulators.

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“…For instance, separate AFM orderings of two Ce sublattices has been reported in Ce 5 Ni 6 In 11 [21], while Ce 9 Ru 4 Ga 5 contains three independent Ce sites where two of them order antiferromagnetically at T N =3.7 K and a third one exhibits valence fluctuations [22]. Most remarkably, in the compounds Ce 3 TIn 11 (T = Pt and Pd), bearing two inequivalent Ce sites, a coexistence of AFM order and HFSC has recently been discovered [23][24][25], which set a new playground for comprehensive studies on mutual relationship between magnetism and superconductivity in Ce-based HF systems.…”

Section: Introductionmentioning

confidence: 95%

Magnetic field driven complex phase diagram of antiferromagnetic heavy-fermion superconductor Ce3PtIn11

Das

Gnida

Bochenek

et al. 2018

Sci Rep

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We present the results of our comprehensive investigation on the antiferromagnetic heavy-fermion superconductor Ce3PtIn11 carried out by means of electrical transport, heat capacity and ac magnetic susceptibility measurements, performed on single-crystalline specimens down to 50 mK in external magnetic fields up to 9 T. Our experimental results elucidate a complex magnetic field – temperature phase diagram which contains both first- and second-order field-induced magnetic transitions and highlights the emergence of field stabilized phases. Remarkably, a prominent metamagnetic transition was found to occur at low temperatures and strong magnetic fields. In turn, the results obtained in the superconducting phase of Ce3PtIn11 corroborate an unconventional nature of Cooper pairs formed by heavy quasiparticles. The compound is an almost unique example of a heavy fermion system in which superconductivity may coexist microscopically with magnetically ordered state.

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Coexistence of Antiferromagnetism and Superconductivity in Heavy Fermion Cerium Compound Ce3PdIn11

Cited by 29 publications

References 32 publications

Unexpected differences between surface and bulk spectroscopic and implied Kondo properties of heavy fermion CeRh2Si2

Unexpected differences between surface and bulk spectroscopic and implied Kondo properties of heavy fermion CeRh2Si2

Interfacial superconductivity in a bi-collinear antiferromagnetically ordered FeTe monolayer on a topological insulator

Magnetic field driven complex phase diagram of antiferromagnetic heavy-fermion superconductor Ce3PtIn11

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