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Kim, S. K.; Torikachvili, M. S.; Bud’ko, Sergey L.; Canfield, Paul C.

doi:10.1103/physrevb.88.045116

Cited by 14 publications

(28 citation statements)

References 46 publications

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“…Reported data of hydrostatic pressure in YbFe 2 Zn 20 showed that the residual resistivity increases as a function of pressure [18] and is in agreement with the reduction of ρ 0 for negative pressures (see Tab. 3). The inset of Fig.…”

Section: Analysis and Discussionsupporting

confidence: 78%

“…For the undoped sample a clear coherence shoulder is seen at low temperatures, in agreement with previous studies. [8,18] For the doped samples the coherence peak broadens as the overall resistivity decreases strongly in the full range of temperatures. The inset shows the low-temperature behavior of the electrical resistivity as a function of T 2 , evidencing Fermi liquid behavior ρ = ρ 0 + AT 2 at the lowest temperatures.…”

Section: Resultsmentioning

confidence: 99%

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Tuning the electronic hybridization in the heavy fermion cage compound YbFe₂Zn₂₀with Cd doping

Cabrera-Baez

Ribeiro

Ávila

2016

J. Phys.: Condens. Matter

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Abstract.Tuning of the electronic properties of heavy fermion compounds by chemical substitutions provides excellent opportunities to further understand the physics of hybridized ions in crystal lattices. Here we present an investigation on the effects of Cd doping in flux-grown single crystals of the complex intermetallic cage compound YbFe 2 Zn 20 , that has been described as a heavy fermion with Sommerfeld coefficient of 535 mJ/mol.K 2 . Substitution of Cd for Zn disturbs the system by expanding the unit cell and, in this case, the size of the Zn cages that surround Yb and Fe. With increasing amount of Cd, the hybridization between Yb 4f electrons and the conduction electrons is weakened, as evidenced by a decrease in the Sommerfeld coefficient, which should be accompanied by a valence shift of the Yb 3+ due to the negative chemical pressure effect. This scenario is also supported by the low temperature dc-magnetic susceptibility, that is gradually suppressed and evidences an increment of the Kondo temperature, based on a shift to higher temperatures of the characteristic broad susceptibility peak. Furthermore, the DC resistivity decreases with the isoelectronic Cd substitution for Zn, contrary to the expectation for an increasingly disordered system, and implying that the valence shift is not related to charge carrier doping. The combined results demonstrate excellent complementarity between positive physical pressure and negative chemical pressure, and point to a rich playground for exploring the physics and chemistry of strongly correlated electron systems in the general family of Zn 20 compounds, despite their structural complexity.

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Section: Analysis and Discussionsupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Tuning the electronic hybridization in the heavy fermion cage compound YbFe₂Zn₂₀with Cd doping

Cabrera-Baez

Ribeiro

Ávila

2016

J. Phys.: Condens. Matter

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“…For sample 1, when increasing the pressure, the 300 K resistivity, ρ 300K , is monotonically suppressed, which is similar to Ref. 46. ρ 300K shows a non-monotonic dependence on pressure when higher pressure values are achieved.…”

Section: Resultssupporting

confidence: 85%

“…Several years ago, high pressure resistivity measure-arXiv:1808.01367v1 [cond-mat.str-el] 3 Aug 2018 ments were performed up to 8.23 GPa for YbFe 2 Zn 20 [46]. Increasing pressure drives T K to lower values and enhanced the A-coefficient (∆ρ(T ) ∝ AT 2 ); a QCP of ∼ 10 GPa was inferred [46]. In this work, by employing a diamond anvil cell in a dilution refrigerator, we extend the pressure range up to ∼ 26 GPa and lower the base temperature to 50 mK.…”

Section: Introductionmentioning

confidence: 99%

Collapse of the Kondo state and ferromagnetic quantum phase transition in YbFe2Zn20

Kaluarachchi

Ying

et al. 2018

Phys. Rev. B

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We present the electrical resistivity data under application of pressures up to ∼ 26 GPa and down to 50 mK temperatures on YbFe2Zn20. We find a pressure induced magnetic phase transition with an onset at pc = 18.2± 0.8 GPa. At ambient pressure, YbFe2Zn20 manifests a heavy fermion, nonmagnetic ground state and the Fermi liquid behavior at low temperatures. As pressure is increased, the power law exponent in resistivity, n, deviates significantly from Fermi liquid behavior and tends to saturate with n = 1 near pc. A pronounced resistivity maximum, Tmax, which scales with Kondo temperature is observed. Tmax decreases with increasing pressure and flattened out near pc indicating the suppression of Kondo exchange interaction. For p > pc, Tmax shows a sudden upward shift, most likely becoming associated with crystal electric field scattering. Application of magnetic field for p > pc broadens the transition and shifts it toward the higher temperature, which is a typical behavior of the ferromagnetic transition. The magnetic transition appears to abruptly develop above pc, suggesting probable first-order (with changing pressure) nature of the transition; once stabilized, the ordering temperature does not depend on pressure up to ∼ 26 GPa. Taken as a whole, these data suggest that YbFe2Zn20 has a quantum phase transition at pc = 18.2 GPa associated with the avoided quantum criticality in metallic ferromagnets.

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“…As a tuning parameter, pressure is considered clean compared to substitution since it does not induce extra chemical disorder into the systems. It has been proven to be very useful in terms of tuning the ground state in many systems [15][16][17][18] , such as Fe-based superconductors [19][20][21][22] and quantum-critical materials [23][24][25][26] . Earlier studies of the effect of hydrostatic pressure on ABi 3 revealed that, for LaBi 3 and SrBi 3 , pressure linearly suppresses T c up to 1.55 GPa and 0.81 GPa, respectively 11,13 .…”

Section: Introductionmentioning

confidence: 99%

Pressure-induced multiple phase transformations of the BaBi3 superconductor

Ribeiro

Kaluarachchi

et al. 2018

Phys. Rev. B

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Measurements of temperature-dependent resistance and magnetization under hydrostatic pressures up to 2.13 GPa are reported for single-crystalline, superconducting BaBi3. A temperaturepressure phase diagram is determined and the results suggest three different superconducting phases α, β, and γ in the studied pressure range. We further show that occurrence of the three superconducting phases is intuitively linked to phase transitions at higher temperature which are likely first order in nature. Tp, which separates phase α from β and γ, is associated with an abrupt resistance change as pressure is increased from 0.27 GPa to 0.33 GPa. Above 0.33 GPa, an "S-shape" anomaly in the temperature-dependent resistance curve, TS, is observed and associated with the transition between the β and γ phases. Further increasing of pressure above 1.05 GPa suppresses this transition and BaBi3 stays in γ phase over the whole investigated temperature range. These high-temperature anomalies are likely related to structural degrees of freedom. With the α phase being the ambient-pressure tetragonal structure (P 4/mmm), our first-principle calculations suggest the β phase to be cubic structure (P m − 3m) and the γ phase to be a distorted tetragonal structure where the Bi atoms are moved out of the face-centered position. Finally, an analysis of the evolution of the superconducting upper critical field with pressure further confirms these transitions in the superconducting state and suggests a possible change of band structure or a Lifshitz transition near 1.54 GPa in γ phase. Given the large atomic numbers of both Ba and Bi, our results establish BaBi3 as a good candidate for the study of the interplay of structure with superconductivity in the presence of strong spin-orbit coupling.

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Search for pressure-induced quantum criticality in YbFe2Zn20

Cited by 14 publications

References 46 publications

Tuning the electronic hybridization in the heavy fermion cage compound YbFe₂Zn₂₀with Cd doping

Tuning the electronic hybridization in the heavy fermion cage compound YbFe₂Zn₂₀with Cd doping

Collapse of the Kondo state and ferromagnetic quantum phase transition in YbFe2Zn20

Pressure-induced multiple phase transformations of the BaBi3 superconductor

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Search for pressure-induced quantum criticality in YbFe2Zn20

Cited by 14 publications

References 46 publications

Tuning the electronic hybridization in the heavy fermion cage compound YbFe2Zn20with Cd doping

Tuning the electronic hybridization in the heavy fermion cage compound YbFe2Zn20with Cd doping

Collapse of the Kondo state and ferromagnetic quantum phase transition in YbFe2Zn20

Pressure-induced multiple phase transformations of the BaBi3 superconductor

Contact Info

Product

Resources

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Tuning the electronic hybridization in the heavy fermion cage compound YbFe₂Zn₂₀with Cd doping

Tuning the electronic hybridization in the heavy fermion cage compound YbFe₂Zn₂₀with Cd doping