Superconducting transition temperature and pressure effect in bcc transition metals

1976 ◽  
Vol 14 (7) ◽  
pp. 2857-2864 ◽  
Author(s):  
A. Birnboim
Keyword(s):  
Transition Temperature ◽  
Transition Metals ◽  
Superconducting Transition Temperature ◽  
Pressure Effect ◽  
Superconducting Transition ◽  
Temperature And Pressure

Simulation of Structural Parameters and Superconducting Transition Temperature of MgB2 under Pressure

2005 ◽  
Vol 475-479 ◽  
pp. 3319-3322
Author(s):  
Yang Shao ◽  
X. Zhang ◽  
Fu Ling Tang
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Pressure Effect ◽  
Structural Parameters ◽  
Experimental Results ◽  
Bcs Theory ◽  
Superconducting Transition ◽  
Potential Parameters

We successfully developed the potential parameters for simulation of MgB2. With these potential parameters, we calculate the lattice parameters and volume variations with pressure up to 240GPa. All these results agree well with experimental data under 40GPa and provide reasonable tendencies from 40GPa to 240GPa. By employing the McMillan expression, it is found that the lattice stiffening dominants the behavior of Tc under pressure in the scope of BCS theory. Using our calculated Grüneisen parameter G g , the simulated pressure effect on Tc accords well with experimental results. Our result shows that the Tc of MgB2 can be destroyed by high pressure.

Pressure Effect on the Superconducting Transition Temperature for (YxBa1-x)CuO2.3Compound System

1987 ◽  
Vol 26 (Part 2, No. 5) ◽  
pp. L867-L868 ◽  
Author(s):  
Hajime Yoshida ◽  
Hiroaki Morita ◽  
Koshichi Noto ◽  
Takejiro Kaneko ◽  
Hiroyasu Fujimori
Keyword(s):  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Pressure Effect ◽  
Superconducting Transition

HIGH PRESSURE STUDY OF La3Ni2B2Nx

1995 ◽  
Vol 09 (11n12) ◽  
pp. 731-736
Author(s):  
Y. CAO ◽  
R. L. MENG ◽  
C. W. CHU
Keyword(s):  
High Pressure ◽  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Pressure Effect ◽  
Nominal Composition ◽  
Superconducting Transition ◽  
Superconducting Compounds ◽  
High Pressure Study

The pressure effect on the superconducting transition temperature (T c ) of the newly discovered compound with a nominal composition La 3 Ni 2 B 2 N x with a T c ~14 K has been determined up to 1.5 GPa. T c was found to decrease linearly at a rate of –0.9 K/GPa, which is much greater than that of similar superconducting compounds, LuNi 2 B 2 C and Lu 2 Ni 2 B 2 C 2, while the compound resistivity remains unchanged. Reasons for the observation remain unknown.

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