Pressure-induced Quantum Phase Transition in Cr1-xVx Alloys

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概要

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•   The electrical resistivities and Hall effect of Cr1-xVx alloys(x<0.04) were measured at high pressure. The Néel temperature TN of x = 0.015, 0.032 and 0.035 was found to disappear at corresponding Pc of 5.6 GPa, 1.1 GPa and 0.7 GPa, respectively. The Hall coefficients of x = 0.032 and 0.035 demonstrated a discontinuous change around Pc, which implies a quantum phase transition induced by high pressure. We found that the exponents in the power law of resistivity of x = 0.015 had an anomaly around Pc, which means that the large quantum fluctuations affect the resistivity even at high temperature. A possibility of superconductivity is explored near Pc for x = 0.032. A slight decrease in the ρ(T) curve was observed below 1 K at high pressure. The origins for that are briefly discussed.

• 社団法人　日本磁気学会の論文

著者

• Nakano T.

  Department Of Physics Kyoto University

• UWATOKO Y.

  Institute for Solid State Physics, University of Tokyo

• OOMI G.

  Department of Mechanical Engineering and Materials Science, Kumamoto University

• Fuchizaki Y.

  Department of Physics, Kyushu University

• Ohashi M.

  Faculty of Environmental Design, Kanazawa University

• Uwatoko Y.

  Institute For Solid State Physics University Of Tokyo

• Uwatoko Y.

  Institute of Solid State Physics, Tokyo University

• FUCHIZAKI Y.

  Department of Physics, Kyushu Univ.

• Oomi G.

  Department of Mechanical Engineering and Materials Science, Faculty of Engineering, Kumamoto University

• OOMI G.

  Department of Physics, Kyushu University

• Uwatoko Y.

  Institute for Solid State Physice, University of Tokyo

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