Effects of Pressure on Cage-Structural Compound Ce3Pd20Ge6

Hidaka, Hisao; Ramos, S. M.; Hering, E. N.; Fontes, M. B.; Baggio-Saitovitch, E.; Otani, S.; Wakabayashi, Takumi; Shimizu, Yusei; Yanagisawa, Tatsuya; Arima, Hiroshi

doi:10.1088/1742-6596/391/1/012019

Cited by 5 publications

(7 citation statements)

References 16 publications

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“…A similar influence of the CEF levels on the electrical resistivity can be observed in many other cerium based compounds. [29][30][31][32][33][34][35][36][37][38][39][40][41] The two anomalies we observe are expected to merge under pressure with the increase of the Kondo effect 42 and indeed, at a qualitative level, this is observed in Fig. 1(b) as the pressure is increased.…”

Section: Resultssupporting

confidence: 53%

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

et al. 2013

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Thorough resistivity measurements on single crystals of CeZn11 under pressure p and magnetic field H are presented. At ambient pressure, CeZn11 orders antiferromagnetically at TN=2 K. The pressure dependence of the resistivity reveals an increase of the Kondo effect. We determine the pressure evolution of the magnetic exchange interaction between conduction and localized 4f electrons. It qualitatively reproduces the pressure evolution of the magnetic ordering temperature TO1 (with TO1=TN at ambient pressure). In addition to TO1, a new anomaly TO2appears under pressure. Both anomalies are found to increase with applied pressure up to 4.9 GPa, indicating that CeZn11 is far from a pressure induced quantum critical point. Complex T-H phase diagrams are obtained under pressure which reveal the instability of the ground state in this compound. Keywords Physics and Astronomy Disciplines Condensed Matter Physics CommentsThis article is from Physical Review B 88 (2013) Thorough resistivity measurements on single crystals of CeZn 11 under pressure p and magnetic field H are presented. At ambient pressure, CeZn 11 orders antiferromagnetically at T N = 2 K. The pressure dependence of the resistivity reveals an increase of the Kondo effect. We determine the pressure evolution of the magnetic exchange interaction between conduction and localized 4f electrons. It qualitatively reproduces the pressure evolution of the magnetic ordering temperature T O 1 (with T O 1 = T N at ambient pressure). In addition to T O 1 , a new anomaly T O 2 appears under pressure. Both anomalies are found to increase with applied pressure up to 4.9 GPa, indicating that CeZn 11 is far from a pressure induced quantum critical point. Complex T -H phase diagrams are obtained under pressure which reveal the instability of the ground state in this compound.

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Section: Resultssupporting

confidence: 53%

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

et al. 2013

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“…Below T max , ρ(T ) falls rapidly, showing an S-shaped profile below 3 K, with a broad hump around 1 K. This profile is similar to ρ(T ) data previously reported for p < 80 kbar and T > 0.5 K in a sample that showed a lower T N and no clear sign of quadrupolar order [22]. The maximum and the kink might either be due to Kondo scattering from the excited and ground state crystal electric field levels, respectively, as expected in the Cornut and Coqblin scenario [25], or due to Kondo scattering from the two different Ce sites of the crystal structure as suggested previously [22,23]. In either case, we expect the temperature of the maximum (T max ) to contain information on the Kondo temperature of at least one site.…”

Section: A Electrical Transportsupporting

confidence: 58%

“…We observe that the relative enhancement from 0 up to 0.8 T is . This phase diagram is distinctly different from the T -p phase diagrams reported for the related compounds CeB 6 [34] and Ce 3 Pd 20 Ge 6 [23]. These are cubic heavy fermion compounds that were shown to undergo magnetic and quadrupolar transitions [35].…”

Section: Quantum Criticality Under B and Pmentioning

confidence: 62%

“…The maximum and the kink might either be due to Kondo scattering from the excited and ground state crystal electric field levels, respectively, as expected in the Cornut and Coqblin scenario [25], or due to Kondo scattering from the two different Ce sites of the crystal structure as suggested previously [22,23]. In either case, we expect the temperature of the maximum (T max ) to contain information on the Kondo temperature of at least one site.…”

Section: A Electrical Transportmentioning

confidence: 63%

“…However, no information about the pressure evolution of T N or T Q could be inferred from those measurements. More recently, electrical resistivity measurements up to 40 kbars in the isostructural germanide compound Ce 3 Pd 20 Ge 6 revealed that both the AF (T N = 0.75 K) and the ferroquadrupolar (T F Q = 1.2 K) transition show a tendency to disappear at pressures higher than 50 kbars [23].…”

Section: Introductionmentioning

confidence: 99%

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Converse effect of pressure on the quadrupolar and magnetic transition inCe3Pd20Si6

et al. 2016

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The heavy fermion compound Ce 3 Pd 20 Si 6 displays unconventional quantum criticality as the lower of two consecutive phase transitions is fully suppressed by magnetic field. Here we report on the effects of pressure as an additional tuning parameter. Specific heat and electrical resistivity measurements reveal a converse effect of pressure on the two transitions, leading to the merging of both transitions at 6.2 kbars. The field-induced quantum criticality is robust under pressure tuning. We rationalize our findings within an extended version of the global phase diagram for antiferromagnetic heavy fermion quantum criticality.

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Electronic structure of the heavy-fermion caged compoundCe3Pd20X6(X=Si,Ge)
Yamaoka
¹
,
Schwier
²
,
Arita
³

et al. 2015
Phys. Rev. B
6
4
8
0
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The electronic structure of Ce3Pd20X6 (X = Si, Ge) has been studied by using detailed density functional theory (DFT) calculations and high-resolution photoelectron spectroscopy (PES) measurements. The orbital decomposition of the electronic structure by DFT calculations indicate that the Ce atoms in the (8c) site surrounded by 16 Pd atoms have a more localized nature and a tendency to be magnetic. Ce atoms in the (4a) site surrounded by 12 Pd and 6 X atoms, on the other hand, show only a negligible magnetic moment. In the photoemission valence-band spectra we observe a strong f 0 (Ce 4+) component with a small fraction of f 1 (Ce 3+) component. The spectral weight of the f 1 component near the Fermi level of Ce3Pd20Si6 is stronger than that for Ce3Pd20Ge6 at the 4d-4f resonance, suggesting stronger c-f hybridization in the former. This may hint to the origin of the large electronic specific coefficient of Ce3Pd20Si6 compared to Ce3Pd20Ge6.

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Effects of Pressure on Cage-Structural Compound Ce₃Pd₂₀Ge₆

Cited by 5 publications

References 16 publications

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Converse effect of pressure on the quadrupolar and magnetic transition inCe3Pd20Si6

Electronic structure of the heavy-fermion caged compoundCe3Pd20X6(X=Si,Ge)
Yamaoka
¹
,
Schwier
²
,
Arita
³

et al. 2015
Phys. Rev. B
6
4
8
0
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Effects of Pressure on Cage-Structural Compound Ce3Pd20Ge6

Cited by 5 publications

References 16 publications

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Converse effect of pressure on the quadrupolar and magnetic transition inCe3Pd20Si6

Electronic structure of the heavy-fermion caged compoundCe3Pd20X6(X=Si,Ge)Yamaoka1, Schwier2, Arita3 et al. 2015Phys. Rev. B6480View full textAdd to dashboardCite

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Effects of Pressure on Cage-Structural Compound Ce₃Pd₂₀Ge₆

Electronic structure of the heavy-fermion caged compoundCe3Pd20X6(X=Si,Ge)
Yamaoka
¹
,
Schwier
²
,
Arita
³

et al. 2015
Phys. Rev. B
6
4
8
0
View full text Add to dashboard Cite