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- Title
Thermodynamic Properties of the Superconducting State in the K<sub>3</sub>C<sub>60</sub> Fulleride.
- Authors
Szczęśniak, R.; Barasiński, A.
- Abstract
In the framework of the Eliashberg formalism, we have calculated the thermodynamic properties of the superconducting state in K3C60 (the critical temperature TC = 19:50 K). We have obtained the following results: (i) The critical value of the Coulomb pseudopotential is equal to 0.387. (ii) The values of the ratios R1 ≡ 2Δ(0)=kBTC and R2 ≡ ΔC(TC)=CN(TC) are bigger than in the BCS model; R1 = 4:01 and R2 = 1:58. (iii) The electron effective mass m*e reaches the highest value for T = TC; [m*e ]max = 2:86me, where me is the bare electron mass. Additionally, we have given the analytical expressions for TC, Δ(T), R1 and R2.
- Subjects
THERMODYNAMICS; SUPERCONDUCTING generators; COULOMB potential; PSEUDOPOTENTIAL method; ELECTRONS; EFFECTIVE mass (Physics); FREE electron theory of metals; ENERGY-band theory of solids; PARTICLES (Nuclear physics); CONSTITUTION of matter
- Publication
Acta Physica Polonica: A, 2009, Vol 116, Issue 6, p1053
- ISSN
0587-4246
- Publication type
Article