Superconductivity of CeRhIn5 under High Pressure

The pressure dependence of transport properties in CeRhIn5 was studied up to 8.5 GPa by using a diamond-anvil cell. The electrical resistivity does not follow the T 2 -dependecne of a Fermi liquid nature under any pressure. In this non-Fermi liquid state, superconductivity was observed in a wide pressure range of 1:5 GPa <P <7:6 GPa. The superconducting temperature TC has a double-maximum structure with a minimum at 5.2 GPa. A maximum of TC ¼ 2:2 K was observed at P ¼ 2:5 GPa, where the corresponding electrical resistivity just above TC has the maximum. The upper critical ;eld HC2 and the magnetoresistances were also investigated under pressure.

[1]  S. Kawasaki,et al.  Pressure-induced anomalous magnetism and unconventional superconductivity in CeRhIn 5 : 115 In-NQR study under pressure , 2001 .

[2]  H. Shishido,et al.  Angular position of nodes in the superconducting gap of quasi-2D heavy-fermion superconductor CeCoIn5. , 2001, Physical review letters.

[3]  K. Tanabe,et al.  Unique spin dynamics and unconventional superconductivity in the layered heavy fermion compound CeIrIn5: NQR evidence. , 2001, Physical review letters.

[4]  Z. Fisk,et al.  Unconventional superconductivity in CeIrIn5 and CeCoIn5: specific heat and thermal conductivity studies. , 2000, Physical review letters.

[5]  Z. Fisk,et al.  A new heavy-fermion superconductor CeIrIn5: A relative of the cuprates? , 2000, cond-mat/0012261.

[6]  Y. Kohori,et al.  Appearance of anisotropic non s-wave superconductivity above the critical pressure of antiferromagnetic CeRhIn5 , 2000 .

[7]  Z. Fisk,et al.  Incommensurate magnetic structure of CeRhIn 5 , 2000, cond-mat/0010196.

[8]  Z. Fisk,et al.  Evidence for spiral magnetic order in the heavy fermion material CeRhIn 5 , 2000 .

[9]  Fisk,et al.  Pressure-induced superconductivity in quasi-2D CeRhIn5 , 2000, Physical review letters.

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

[11]  T. Hiraoka.  The simple spot-welding apparatus , 1998 .

[12]  I. R. Walker,et al.  Spot welder for making small electrical contacts , 1998 .

[13]  K. Shimizu,et al.  Enhancement of superconducting transition temperature in CeCu2Ge2 under high pressures , 1998 .

[14]  I. R. Walker,et al.  The normal and superconducting states of CeIn3 near the border of antiferromagnetic order , 1997 .

[15]  K. Murata,et al.  Pt resistor thermometry and pressure calibration in a clamped pressure cell with the medium, Daphne 7373 , 1997 .

[16]  Cox,et al.  Structural phase transformations and superconductivity in La2-xBaxCuO4. , 1989, Physical review letters.

[17]  E. Helfand,et al.  Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . III. Electron Spin and Spin-Orbit Effects , 1966 .