Relation between metamagnetic transition and quantum critical point in heavy fermion compound YbIr2Zn20

Y. Onuki, S. Yasui, S. Yoshiuchi, M. Ohya, M. Matsushita, Y. Hirose, T. Takeuchi, F. Honda, R. Settai, K. Sugiyama, E. Yamamoto, Y. Haga

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Abstract

We measured the electrical resistivity in magnetic field H under pressure P for a heavy fermion compound YbIr2Zn20. The quantum critical point is found to be defined as an electronic state where the metamagnetic transition field Hm becomes zero. This is realized at Pc ≃ 5.2 GPa. The most characteristic feature in the quantum critical pressure region is an anomalously large A value of the electrical resistivity ρ = ρ0 + AT2, reaching A 380μΩcm/K 2 at 5.0 GPa, which is, however, strongly reduced with increasing the magnetic field: A 1.45μΩcm/K2 at 80 kOe. From the result of the de Haas-van Alphen experiment at ambient pressure, the corresponding cyclotron effective mass of conduction electrons at 5.0 GPa is 400 - 500 m 0 (m0: rest mass of an electron).

Original languageEnglish
Article number012013
JournalJournal of Physics: Conference Series
Volume273
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Onuki, Y., Yasui, S., Yoshiuchi, S., Ohya, M., Matsushita, M., Hirose, Y., Takeuchi, T., Honda, F., Settai, R., Sugiyama, K., Yamamoto, E., & Haga, Y. (2011). Relation between metamagnetic transition and quantum critical point in heavy fermion compound YbIr2Zn20. Journal of Physics: Conference Series, 273(1), [012013]. https://doi.org/10.1088/1742-6596/273/1/012013