The puzzle of the $ \gamma\to\alpha$ and other phase transitions in cerium

Николаев, А. В.; Tsvyashchenko, A. V.

doi:10.3367/ufne.0182.201207b.0701

Cited by 61 publications

(34 citation statements)

References 201 publications

(548 reference statements)

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“…An overview on the cerium volume collapse can be found in Ref. [13]. Most of the previous models proposed consider exclusively the interplay among the spd electrons and the f electrons, whereas the possible effects from the phonons are completely ignored.…”

Section: Introductionmentioning

confidence: 99%

Periodic Anderson model with Holstein phonons for the description of the cerium volume collapse

Yang

Zhang

et al. 2019

Phys. Rev. B

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Recent experiments have suggested that the electron-phonon coupling may play an important role in the γ → α volume collapse transition in Cerium. A minimal model for the description of such transition is the periodic Anderson model. In order to better understand the effect of the electron-phonon interaction on the volume collapse transition, we study the periodic Anderson model with coupling between Holstein phonons and electrons in the conduction band. We find that the electron-phonon coupling enhances the volume collapse, which is consistent with experiments in Cerium. While we start with the Kondo Volume Collapse scenario in mind, our results capture some interesting features of the Mott scenario, such as a gap in the conduction electron spectra which grows with the effective electron-phonon coupling. arXiv:1704.08684v6 [cond-mat.str-el]

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Section: Introductionmentioning

confidence: 99%

Periodic Anderson model with Holstein phonons for the description of the cerium volume collapse

Yang

Zhang

et al. 2019

Phys. Rev. B

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“…The γ  α phase transition in Ce also occurs at room temperature under a pressure of only 7 kbar [9,10,11]. This isostructural γ  α transition is accompanied by a drastic reduction in the magnetic susceptibility [7,12,13] which appears to be due to delocalization of 4f electron in γ-Ce [14]. The low-temperature α' phase, which is stable above 50 kbar, exhibits superconductivity with a T c ≈ 1.7 K [15].…”

Section: Introductionmentioning

confidence: 99%

Antiferromagnetism of β-Ce under hydrostatic pressure

Malavi

Deng

Guillou

et al. 2019

Solid State Communications

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The magnetic properties of β-Ce at low temperature have been studied through ac susceptibility measurements under hydrostatic He-gas pressure up to 4.5 kbar. The Néel temperature, TN = 12.7 K at 58 bar, initially increases with pressure at the rate dTN/dP = +0.32 ± 0.05 K/kbar. After releasing pressure from 4.5 to 0.06 kbar at 40 K, the magnetic susceptibility anomaly associated with the antiferromagnetic transition is markedly reduced. Surprisingly, TN also shifts from 12.7 to 14 K. Both effects likely arise from an irreversible β → α transition under pressure.

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“…The deformation behavior of cerium under diamond cutting is complex for its unique chemical, physical, and mechanical properties. Cerium has multiple lattice structures accompanied with rich paths of phase transformation [ 7 , 8 , 9 , 10 , 11 ]. It has been demonstrated that there are seven kinds of solid phases in cerium: γ (face centered-cubic, FCC), α (FCC), β (double hexagonal close packed, DHCP), δ (body centered-cubic, BCC), α ’ (C-type orthorhombic or the α -U structure), α ’’ (C2/m monoclinic) and ε (body centered tetragonal, BCT).…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Investigation of Residual Stress and Surface Roughness of Cerium under Diamond Cutting

Shuai

Zhang

et al. 2018

Micromachines

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Machined surface quality in terms of residual stress and surface roughness has an important influence on the performance of devices and components. In the present work, we elucidate the formation mechanisms of residual stress and surface roughness of single crystalline cerium under ultraprecision diamond cutting by means of molecular dynamics simulations. Influences of machining parameters, such as the rake angle of a cutting tool, depth of cut, and crystal orientation of the workpiece on the machined surface quality were also investigated. Simulation results revealed that dislocation activity and lattice distortion are the two parallel factors that govern the formation of both residual stress and surface roughness. It was found that both distributions of residual stress and surface roughness of machined surface are significantly affected by machining parameters. The optimum machining parameters for achieving high machined surface quality of cerium by diamond cutting are revealed.

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The puzzle of the $ \gamma\to\alpha$ and other phase transitions in cerium

Abstract: We discuss recent research on the phase transitions in cerium under pressure, including new experiments on the  transition, which indicate that it is a hidden structural phase transition.

Cited by 61 publications

References 201 publications

Periodic Anderson model with Holstein phonons for the description of the cerium volume collapse

Periodic Anderson model with Holstein phonons for the description of the cerium volume collapse

Antiferromagnetism of β-Ce under hydrostatic pressure

Molecular Dynamics Investigation of Residual Stress and Surface Roughness of Cerium under Diamond Cutting

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