Kondo Lattice Behavior in the Valence Fluctuating Systems alpha - and beta -YbAlB sub( 4)
We have measured specific heat and magnetization of the Yb-based heavy Fermion systems alpha -YbAlB ... and ...-YbAlB ... . alpha -YbAlB ... is a locally isostructural polymorph of the first example of an Yb-based heavy Fermion superconductor beta -YbAlB ... , which exhibits pronounced non-Fermi-liq...
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| Veröffentlicht in: | Journal of the Physical Society of Japan 2011-01, Vol.80, p.1-1 |
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| container_title | Journal of the Physical Society of Japan |
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| creator | Matsumoto, Yosuke Kuga, Kentaro Horie, Naoki Nakatsuji, Satoru |
| description | We have measured specific heat and magnetization of the Yb-based heavy Fermion systems alpha -YbAlB ... and ...-YbAlB ... . alpha -YbAlB ... is a locally isostructural polymorph of the first example of an Yb-based heavy Fermion superconductor beta -YbAlB ... , which exhibits pronounced non-Fermi-liquid behavior above the superconducting transition temperature T ... = 80 mK. The results reveal a Fermi liquid ground state for alpha -YbAlB ... in contrast to the quantum criticality found for beta -YbAlB ... . Interestingly, both systems exhibit Kondo lattice behavior with its characteristic temperature scale T * ~8 K, despite of their strongly intermediate valence with the temperature scale of ~ 200 K. We discuss the origin of this unusual behavior, making a comparison with the typical mixed valent compound YbAl ... . Large Wilson ratios indicate the existence of ferromagnetic correlation as a possible origin for the Kondo lattice behavior. (ProQuest: ... denotes formulae/symbols omitted.) |
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The results reveal a Fermi liquid ground state for alpha -YbAlB ... in contrast to the quantum criticality found for beta -YbAlB ... . Interestingly, both systems exhibit Kondo lattice behavior with its characteristic temperature scale T * ~8 K, despite of their strongly intermediate valence with the temperature scale of ~ 200 K. We discuss the origin of this unusual behavior, making a comparison with the typical mixed valent compound YbAl ... . Large Wilson ratios indicate the existence of ferromagnetic correlation as a possible origin for the Kondo lattice behavior. 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The results reveal a Fermi liquid ground state for alpha -YbAlB ... in contrast to the quantum criticality found for beta -YbAlB ... . Interestingly, both systems exhibit Kondo lattice behavior with its characteristic temperature scale T * ~8 K, despite of their strongly intermediate valence with the temperature scale of ~ 200 K. We discuss the origin of this unusual behavior, making a comparison with the typical mixed valent compound YbAl ... . Large Wilson ratios indicate the existence of ferromagnetic correlation as a possible origin for the Kondo lattice behavior. 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The results reveal a Fermi liquid ground state for alpha -YbAlB ... in contrast to the quantum criticality found for beta -YbAlB ... . Interestingly, both systems exhibit Kondo lattice behavior with its characteristic temperature scale T * ~8 K, despite of their strongly intermediate valence with the temperature scale of ~ 200 K. We discuss the origin of this unusual behavior, making a comparison with the typical mixed valent compound YbAl ... . Large Wilson ratios indicate the existence of ferromagnetic correlation as a possible origin for the Kondo lattice behavior. (ProQuest: ... denotes formulae/symbols omitted.)</abstract></addata></record> |
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| identifier | ISSN: 0031-9015 |
| ispartof | Journal of the Physical Society of Japan, 2011-01, Vol.80, p.1-1 |
| issn | 0031-9015 1347-4073 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Heavy fermion superconductors Heavy fermion systems Lattices LATTICES (CRYSTAL) MAGNETIC PROPERTIES Magnetization Origins SPECIFIC HEAT SUPERCONDUCTIVITY SUPERCONDUCTORS Temperature scales Transition temperature VALENCE YTTRIUM OXIDE |
| title | Kondo Lattice Behavior in the Valence Fluctuating Systems alpha - and beta -YbAlB sub( 4) |
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