Inelastic neutron scattering study of crystalline electric field excitations in the caged compounds NdT2Zn20 (T=Co, Rh, and Ir)

Rikako Yamamoto; Manh Duc Le; Devashibhai T. Adroja; Yasuyuki Shimura; Toshiro Takabatake; Takahiro Onimaru

doi:10.1103/PhysRevB.107.075114

Inelastic neutron scattering study of crystalline electric field excitations in the caged compounds NdT2Zn20 (T=Co, Rh, and Ir)

Rikako Yamamoto, Manh Duc Le, Devashibhai T. Adroja, Yasuyuki Shimura, Toshiro Takabatake, Takahiro Onimaru

Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have measured crystalline electric field (CEF) excitations of Nd3+ ions in the two-channel Kondo lattice candidates NdT2Zn20 (T = Co, Rh, and Ir) by means of inelastic neutron scattering (INS). In the INS measurements at 5 K, dispersionless excitations were observed at 3.8 and 7.2 meV for T=Co, 3.1 and 5.8 meV for T=Rh, and 3.0 and 5.3 meV for T=Ir. Analyses of the temperature dependence of the INS spectra confirm that the CEF ground states are the Γ6 doublet, that is a requisite for manifestation of the magnetic two-channel Kondo effect. For T=Co, a shoulder was observed at 7.7 meV close to the CEF excitation peak centered at 7.2 meV. The shoulder is attributed to a bound state of the CEF and low-lying optical phonon excitations.

Original language	English
Article number	075114
Journal	Physical Review B
Volume	107
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.107.075114
Publication status	Published - 15 Feb 2023

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.107.075114

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title = "Inelastic neutron scattering study of crystalline electric field excitations in the caged compounds NdT2Zn20 (T=Co, Rh, and Ir)",

abstract = "We have measured crystalline electric field (CEF) excitations of Nd3+ ions in the two-channel Kondo lattice candidates NdT2Zn20 (T = Co, Rh, and Ir) by means of inelastic neutron scattering (INS). In the INS measurements at 5 K, dispersionless excitations were observed at 3.8 and 7.2 meV for T=Co, 3.1 and 5.8 meV for T=Rh, and 3.0 and 5.3 meV for T=Ir. Analyses of the temperature dependence of the INS spectra confirm that the CEF ground states are the Γ6 doublet, that is a requisite for manifestation of the magnetic two-channel Kondo effect. For T=Co, a shoulder was observed at 7.7 meV close to the CEF excitation peak centered at 7.2 meV. The shoulder is attributed to a bound state of the CEF and low-lying optical phonon excitations.",

author = "Rikako Yamamoto and Le, {Manh Duc} and Adroja, {Devashibhai T.} and Yasuyuki Shimura and Toshiro Takabatake and Takahiro Onimaru",

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T1 - Inelastic neutron scattering study of crystalline electric field excitations in the caged compounds NdT2Zn20 (T=Co, Rh, and Ir)

AU - Yamamoto, Rikako

AU - Le, Manh Duc

AU - Adroja, Devashibhai T.

AU - Shimura, Yasuyuki

AU - Takabatake, Toshiro

AU - Onimaru, Takahiro

PY - 2023/2/15

Y1 - 2023/2/15

N2 - We have measured crystalline electric field (CEF) excitations of Nd3+ ions in the two-channel Kondo lattice candidates NdT2Zn20 (T = Co, Rh, and Ir) by means of inelastic neutron scattering (INS). In the INS measurements at 5 K, dispersionless excitations were observed at 3.8 and 7.2 meV for T=Co, 3.1 and 5.8 meV for T=Rh, and 3.0 and 5.3 meV for T=Ir. Analyses of the temperature dependence of the INS spectra confirm that the CEF ground states are the Γ6 doublet, that is a requisite for manifestation of the magnetic two-channel Kondo effect. For T=Co, a shoulder was observed at 7.7 meV close to the CEF excitation peak centered at 7.2 meV. The shoulder is attributed to a bound state of the CEF and low-lying optical phonon excitations.

AB - We have measured crystalline electric field (CEF) excitations of Nd3+ ions in the two-channel Kondo lattice candidates NdT2Zn20 (T = Co, Rh, and Ir) by means of inelastic neutron scattering (INS). In the INS measurements at 5 K, dispersionless excitations were observed at 3.8 and 7.2 meV for T=Co, 3.1 and 5.8 meV for T=Rh, and 3.0 and 5.3 meV for T=Ir. Analyses of the temperature dependence of the INS spectra confirm that the CEF ground states are the Γ6 doublet, that is a requisite for manifestation of the magnetic two-channel Kondo effect. For T=Co, a shoulder was observed at 7.7 meV close to the CEF excitation peak centered at 7.2 meV. The shoulder is attributed to a bound state of the CEF and low-lying optical phonon excitations.

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Inelastic neutron scattering study of crystalline electric field excitations in the caged compounds NdT2Zn20 (T=Co, Rh, and Ir)

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