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Magnetic field dependence of cyclotron masses in heavy-fermion conductors in a two-band hybridization model

We present a theory which describes the magnetic field dependence of the cyclotron masses in an exactly solvable two-band hybridization model (TBHM) of a heavy fermion conductor with quadratic dispersion laws of electrons. The heavy cyclotron mass strongly decreases with increasing magnetic field, eventually reaching the value of a light band mass. The results obtained explain the de Haas-van Alphen (dHvA)-effect data in some heavy fermionic conductors (HFC) and indicate a direction in comprehension of the nonmonotonic dependence of the heat capacity term linear in the temperature on the magnetic field.