The authors report transport measurements through a single-mol. magnet, the Mn12 deriv. [Mn12O12(O2C-C6H4-SAc)16(H2O)4], in a single-mol. transistor geometry. Thiol groups connect the mol. to gold electrodes that are fabricated by electromigration. Striking observations are regions of complete current suppression and excitations of neg. differential conductance on the energy scale of the anisotropy barrier of the mol. Transport calcns., taking into account the high-spin ground state and magnetic excitations of the mol., reveal a blocking mechanism of the current involving nondegenerate spin multiplets.
Electron Transport through Single Mn12 Molecular Magnets / H. B., HEERSCHE; Z., DE GROOT; J. A., FOLK; H. S. J., VAN DER ZANT; C., ROMEIKE; M. R., WEGEWIJS; ZOBBI, Laura; D., BARRECA; E., TONDELLO; CORNIA, Andrea. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 96:(2006), pp. 206801/1-206801/4. [10.1103/PhysRevLett.96.206801]
Electron Transport through Single Mn12 Molecular Magnets
ZOBBI, Laura;CORNIA, Andrea
2006
Abstract
The authors report transport measurements through a single-mol. magnet, the Mn12 deriv. [Mn12O12(O2C-C6H4-SAc)16(H2O)4], in a single-mol. transistor geometry. Thiol groups connect the mol. to gold electrodes that are fabricated by electromigration. Striking observations are regions of complete current suppression and excitations of neg. differential conductance on the energy scale of the anisotropy barrier of the mol. Transport calcns., taking into account the high-spin ground state and magnetic excitations of the mol., reveal a blocking mechanism of the current involving nondegenerate spin multiplets.
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CORNIA, Phys. Rev. Lett. 2006, 96, 206801 1-4.pdf
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