It is shown that a recent theory due to Kaiser concerning the effect of nonmagnetic resonant states on superconductivity appropriately and accurately describes the dependence of the transition temperatureT c ofThCe alloys on Ce concentration. The parameters describing thef-resonant states in the Anderson model are determined by fitting Kaiser's theory to the data, and reasonable values are obtained. With the assumption that the Hartree-Fock level width remains constant under pressure, it is shown that thef level moves further above the Fermi level as the pressure is increased. This is discussed in relation to recent pressure experiments on La and La compounds containing Ce impurities.
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Research sponsored by the Air Force Office of Scientific Research, Office of Aerospace Research, U.S. Air Force, under Grant No. AF-AFOSR-631-67-A.
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Huber, J.G., Maple, M.B. The effect of nonmagnetic 4f resonances on the superconducting transition temperature:ThCe alloys. J Low Temp Phys 3, 537–544 (1970). https://doi.org/10.1007/BF00628221
- Transition Temperature
- Magnetic Material
- Fermi Level
- Resonant State
- Superconducting Transition Temperature