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Low-temperature NMR study of YbAlB4 (CROSBI ID 609325)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa

Grbić, Mihael Srđan ; Kimura, Kentaro ; Takano, Shun ; Tajima, K. ; Yoshida, Makoto ; Takigawa, Masashi ; Kuga, Kentaro ; O’Farrell, Eoin C. T. Nakatsuji, Satoru Low-temperature NMR study of YbAlB4 // Abstracts of Quantum criticality and valence fluctuations in strongly correlated electron systems. 2013. str. 4-5

Podaci o odgovornosti

Grbić, Mihael Srđan ; Kimura, Kentaro ; Takano, Shun ; Tajima, K. ; Yoshida, Makoto ; Takigawa, Masashi ; Kuga, Kentaro ; O’Farrell, Eoin C. T. Nakatsuji, Satoru

engleski

Low-temperature NMR study of YbAlB4

Quantum critical behavior is a perfect playground of condensed matter physics as it can lead to discovery of new phases of matter and better understanding of strongly correlated systems. Two structural isomorphs of YbAlB4 ( and  ), show an interesting sensitivity of quantum criticality on local symmetry of B ring which encircles the Yb ion. While at ambient pressure and zero magnetic field  -YbAlB4 shows non-Fermi-liquid properties of quantum criticality [1],  -YbAlB4 has a Fermi-liquid ground state. We will present most recent results of an NMR study in both compounds, in particular the low temperature behavior of the spin-lattice relaxation rate. While in  -YbAlB4 magnetic field suppresses quantum criticality, in  -YbAlB4 at finite magnetic field we find a clear change from the Fermi-liquid temperature dependence to a divergent non-Fermi-liquid behavior. Existence of a quantum critical point in both isomorphs is a stringent constraint for possible mechanisms of the Kondo-lattice physics in these compounds. [1] Y. Matsumoto, S. Nakatsuji et al., Science 331, 316 (2011).

valence fluctuation; ytterbium; nmr

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Podaci o prilogu

4-5.

2013.

objavljeno

Podaci o matičnoj publikaciji

Abstracts of Quantum criticality and valence fluctuations in strongly correlated electron systems

Podaci o skupu

Quantum criticality and valence fluctuations in strongly correlated electron systems

predavanje

25.02.2013-26.02.2013

Kashiwa, Japan

Povezanost rada

Fizika