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首页> 外文期刊>Physical review >Field-induced quadrupolar quantum criticality in PrV_2Al_(20)
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Field-induced quadrupolar quantum criticality in PrV_2Al_(20)

机译：PrV_2Al_（20）中的场致四极量子临界

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摘要

PrV_2Al_(20) is a heavy-fermion superconductor based on the cubic Γ_3 doublet that exhibits nonmagnetic quadrupolar ordering below ～0.6 K. Our magnetotransport study on PrV_2Al_(20) reveals field-induced quadrupolar quantum criticality at μ_0H_c ～ 11 T applied along the [111] direction. Near the critical field μ_0H_c required to suppress the quadrupolar state, we find a marked enhancement of the resistivity ρ(H, T), a divergent quasiparticle effective mass and concomitant non-Fermi-liquid (NFL) behavior [i.e., ρ(T) ∝ T~n with n ≤ 0.5]. We also observe the Shubnikov-de Haas effect above μ_0H_c, indicating effective mass enhancement or m~*/m_0 ～ 10. This reveals the competition between the nonmagnetic Kondo effect and the intersite quadrupolar coupling which leads to pronounced NFL behavior in an extensive region of T and μ_0H emerging from the quantum-critical point.
机译：PrV_2Al_（20）是一种基于立方Γ_3双峰的重费米超导体，在〜0.6 K以下具有非磁性四极有序。我们对PrV_2Al_（20）的磁输运研究表明，沿[ 111]方向。在抑制四极状态所需的临界场μ_0H_c附近，我们发现电阻率ρ（H，T）显着增强，准粒子有效质量发散，并且伴随着非费米液体（NFL）行为[即ρ（T） ∝ T〜n，n≤0.5]。我们还观察到在μ_0H_c以上的Shubnikov-de Haas效应，表明有效的质量增强或m〜* / m_0〜10。这揭示了非磁性的Kondo效应与位点间的四极耦合之间的竞争，这导致了NFL行为在宽广的区域中表现出来。 T和μ_0H从量子临界点出现。

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  • 来源
    《Physical review》 |2015年第24期|241102.1-241102.5|共5页
  • 作者

    Yasuyuki Shimura; Masaki Tsujimoto; Bin Zeng; Luis Balicas; Akito Sakai; Satoru Nakatsuji;

  • 作者单位

    Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan;

    Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan;

    National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, Florida 32310, USA;

    National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, Florida 32310, USA;

    Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan ,I. Physikalisches Institut, Georg-August-Universitaet Goettingen, 37077 Goettingen, Germany;

    Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan ,PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan;

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  • 正文语种 eng
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  • 关键词

    magnetotransport phenomena; materials for magnetotransport; scattering mechanisms and kondo effect;

    机译：磁传输现象;磁运输材料;散射机制和近藤效应;

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