Metamagnetic transitions, electronic structures and quantum critical point of CeRu2 (Si1 - x Gex)2

M. Sugi; T. Fujiwara; Y. Matsumoto; T. Isshiki; N. Kimura; T. Komatsubara; H. Aoki; I. Satoh; T. Terashima; S. Uji

doi:10.1016/j.jmmm.2006.10.027

Metamagnetic transitions, electronic structures and quantum critical point of CeRu₂ (Si_{1 - x} Ge_x)₂

M. Sugi^*, T. Fujiwara, Y. Matsumoto, T. Isshiki, N. Kimura, T. Komatsubara, H. Aoki, I. Satoh, T. Terashima, S. Uji

^*Corresponding author for this work

Department of Physics

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

Abstract

We have studied the electronic structures of CeRu₂ (Si_{1 - x} Ge_x)₂ single crystals, whose ground state changes from paramagnetic state to antiferromagnetic state with increasing Ge concentration across the quantum critical point, via the dHvA effect. It has been reported that the effective masses of the up and down spin conduction electrons in CeRu₂ Si₂ are considerably different, although their Fermi surfaces are nearly the same. Such anomalous conduction electron state is found to exist above the metamagnetic transition fields in both the samples of the paramagnetic and antiferromagnetic ground state.

Original language	English
Pages (from-to)	331-333
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.027
State	Published - 2007/03

Keywords

Fermi surface
Metamagnetic Transition
Spin dependence

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.027

Cite this

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title = "Metamagnetic transitions, electronic structures and quantum critical point of CeRu2 (Si1 - x Gex)2",

abstract = "We have studied the electronic structures of CeRu2 (Si1 - x Gex)2 single crystals, whose ground state changes from paramagnetic state to antiferromagnetic state with increasing Ge concentration across the quantum critical point, via the dHvA effect. It has been reported that the effective masses of the up and down spin conduction electrons in CeRu2 Si2 are considerably different, although their Fermi surfaces are nearly the same. Such anomalous conduction electron state is found to exist above the metamagnetic transition fields in both the samples of the paramagnetic and antiferromagnetic ground state.",

keywords = "Fermi surface, Metamagnetic Transition, Spin dependence",

author = "M. Sugi and T. Fujiwara and Y. Matsumoto and T. Isshiki and N. Kimura and T. Komatsubara and H. Aoki and I. Satoh and T. Terashima and S. Uji",

year = "2007",

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T1 - Metamagnetic transitions, electronic structures and quantum critical point of CeRu2 (Si1 - x Gex)2

AU - Sugi, M.

AU - Fujiwara, T.

AU - Matsumoto, Y.

AU - Isshiki, T.

AU - Kimura, N.

AU - Komatsubara, T.

AU - Aoki, H.

AU - Satoh, I.

AU - Terashima, T.

AU - Uji, S.

PY - 2007/3

Y1 - 2007/3

N2 - We have studied the electronic structures of CeRu2 (Si1 - x Gex)2 single crystals, whose ground state changes from paramagnetic state to antiferromagnetic state with increasing Ge concentration across the quantum critical point, via the dHvA effect. It has been reported that the effective masses of the up and down spin conduction electrons in CeRu2 Si2 are considerably different, although their Fermi surfaces are nearly the same. Such anomalous conduction electron state is found to exist above the metamagnetic transition fields in both the samples of the paramagnetic and antiferromagnetic ground state.

AB - We have studied the electronic structures of CeRu2 (Si1 - x Gex)2 single crystals, whose ground state changes from paramagnetic state to antiferromagnetic state with increasing Ge concentration across the quantum critical point, via the dHvA effect. It has been reported that the effective masses of the up and down spin conduction electrons in CeRu2 Si2 are considerably different, although their Fermi surfaces are nearly the same. Such anomalous conduction electron state is found to exist above the metamagnetic transition fields in both the samples of the paramagnetic and antiferromagnetic ground state.

KW - Fermi surface

KW - Metamagnetic Transition

KW - Spin dependence

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