Impossibility of increasing N´eel temperature in zigzag graphene nanoribbon by electric field and carrier doping

We investigated the dependence of Ne?el temperature as a critical temperature on the electric field and hole-electron doping in the antiferromagnetically ordered zigzag graphene nanoribbon. The temperature was calcu-lated by averaging the magnon energy in the Brillouin zone within the mean-field approximation. We employed the generalized Bloch theorem instead of the supercell approach to reduce the computational cost significantly to obtain the magnon spectrum. We showed that the Ne?el temperature reduces when increasing both the electric field and the hole-electron doping, thus these treatments will never enhance the Ne?el temperature.

Automated summary

The study found that in antiferromagnetically ordered zigzag graphene nanoribbons, the Ne?el temperature decreases with increasing electric field and hole-electron doping, indicating that these treatments will not enhance the Ne?el temperature.