High Pressure Measurements of the Resistivity of β-YbAlB4

The electric resistivity ρ(T) under hydrostatic pressure up to 8 GPa was measured above 2 K using a high-quality single crystal of the Yb-based heavy fermion system β-YbAlB4. We found pressure-induced magnetic ordering above the critical pressure Pc ≈ 2.4 GPa. This phase transition temperature TM is enhanced with pressure and reaches 30 K at a pressure of 8 GPa, which is the highest transition temperature for the Yb-based heavy fermion compounds. In contrast, the resistivity is insensitive to pressure below Pc and exhibits the T-linear behavior in the temperature range between 2 and 20 K. Our results indicate that quantum criticality for β-YbAlB4 is also located near Pc in addition to the ambient pressure.

[1]  S. Nakatsuji,et al.  Evolution of c-f hybridization and two-component Hall effect in β-YbAlB4. , 2012, Physical review letters.

[2]  P. Coleman,et al.  Quantum Criticality Without Tuning in the Mixed Valence Compound β-YbAlB4 , 2011, Science.

[3]  T. Ishikawa,et al.  Strong valence fluctuation in the quantum critical heavy fermion superconductor β-YbAlB4: a hard x-ray photoemission study. , 2009, Physical review letters.

[4]  T. Takabatake,et al.  Formation of a Hybridization Gap in a Cage-Like Compound CeFe2Al10 , 2009 .

[5]  S. Nakatsuji,et al.  Superconducting properties of the non-Fermi-liquid system beta-YbAlB4. , 2008, Physical review letters.

[6]  Z. Fisk,et al.  Superconductivity and quantum criticality in the heavy-fermion system |[beta]|-YbAlB4 , 2008 .

[7]  K. Matsubayashi,et al.  Pressure-induced Magnetic Transition in a Single Crystal of YbCo2Zn20 , 2008 .

[8]  A. Vlaicu,et al.  Intermediate-Valence Behavior of YbCu5-xAlx around Quantum Critical Point Measured by Resonant Inelastic X-ray Scattering at Yb L3 Absorption Edge , 2007 .

[9]  Z. Fisk,et al.  Crystal Structure and Physical Properties of Polymorphs of LnAlB4 (Ln = Yb, Lu) , 2007 .

[10]  J. Thompson,et al.  Investigation of YbInCu4 at pressures to 7 GPa , 2006 .

[11]  G. Lonzarich.  Magnetic quantum liquid enigma , 2005 .

[12]  L. Pintschovius,et al.  Partial order in the non-Fermi-liquid phase of MnSi , 2004, Nature.

[13]  N. Mōri,et al.  Low‐temperature and high-pressure apparatus developed at ISSP, University of Tokyo , 2004 .

[14]  C. Geibel,et al.  Unusual behavior of the low-moment magnetic ground state of YbRh2Si2 under high pressure , 2003 .

[15]  P. Canfield,et al.  Magnetically ordered Kondo lattice in YbNi2Ge2 at high pressure , 2001 .

[16]  C. Geibel,et al.  YbRh2Si2: Pronounced Non-Fermi-Liquid Effects above a Low-Lying Magnetic Phase Transition , 2000 .

[17]  H. Micklitz,et al.  Direct observation of a magnetically ordered state in YbCu 2 Si 2 under high pressure , 1999 .

[18]  N. Mathur,et al.  Magnetically mediated superconductivity in heavy fermion compounds , 1998, Nature.

[19]  N. Mathur,et al.  Magnetic and superconducting phases of CePd2Si2 , 1996 .