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Electric-Field-Induced Triplet to Singlet Transition in Size-2 Trigonal Zigzag Graphene Nanoflake | ||
| Journal of Sciences, Islamic Republic of Iran | ||
| مقاله 10، دوره 23، شماره 3، آذر 2012، صفحه 263-267 اصل مقاله (389.29 K) | ||
| نویسنده | ||
| M. Ghaffarian | ||
| Department of Physics, Faculty of Science, University of Shahid Beheshti, | ||
| چکیده | ||
| Using Hartree-Fock Su-Sheriffer-Heeger (HF-SSH) model, we have studied the dependence of the energies of the ground (magnetic triplet state) and the first exited (nonmagnetic singlet state) states of the size-2 trigonal zigzag graphene nanoflake (size-2 NF) on the intensity of an external in plane static electric field at zero temperature. We identify a transition from the magnetic triplet state to a nonmagnetic singlet state in size-2 NF caused by the polarization energy induced by the in plane static electric field. This transition has a unique property of being accompanied by a sudden increase in the electric dipole moment of the size-2 NF. | ||
| عنوان مقاله [English] | ||
| Electric-Field-Induced Triplet to Singlet Transition in Size-2 Trigonal Zigzag Graphene Nanoflake | ||
| نویسندگان [English] | ||
| M. Ghaffarian | ||
| چکیده [English] | ||
| Using Hartree-Fock Su-Sheriffer-Heeger (HF-SSH) model, we have studied the dependence of the energies of the ground (magnetic triplet state) and the first exited (nonmagnetic singlet state) states of the size-2 trigonal zigzag graphene nanoflake (size-2 NF) on the intensity of an external in plane static electric field at zero temperature. We identify a transition from the magnetic triplet state to a nonmagnetic singlet state in size-2 NF caused by the polarization energy induced by the in plane static electric field. This transition has a unique property of being accompanied by a sudden increase in the electric dipole moment of the size-2 NF. | ||
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