Trilayer graphene-like structure under defect with ferrimagnetic interlayer coupling

The performance of graphene for specific applications is inevitably reliable to the challenge and prospect of various defects during the production process causing disorder. A finite cluster approximation has been directed to study separately two kinds of disorder including (i) bond dilution and (ii) bond randomness described by random variables p and Delta, respectively, for mixed spin-3/2 and spin-1/2 trilayer graphene-like structure. The dependence of the critical and compensation temperature of the concentration p and the fluctuation Delta and various exchange parameters has been discussed. In particular, we have found that the present system can display a horizontal reentrance because of the competition of the exchange couplings strength with the bond concentration p disfavoring the ferrimagnetic order. Interestingly, two compensation points behavior may appear in a certain range of crystal field. Finally, all these behavior has been validated by analyzing the total, sigma- and S- sublattice magnetizations.

Automated summary

The performance of graphene for specific applications is affected by defects during the production process. In this study, a finite cluster approximation is used to investigate the effects of bond dilution and bond randomness on a trilayer graphene-like structure. The dependence of critical and compensation temperature on concentration and fluctuation parameters is discussed. The results show a horizontal reentrance due to the competition between exchange couplings and bond concentration, as well as the appearance of two compensation points within a certain range of crystal field. These findings are validated by analyzing magnetizations.