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A molecule that can exists in different electronic states is brought in between two Au electrodes. The scheme shows a Au STM tip and Au surface. A bias is applied between the electrodes. State-I is highly conducting (thick red arrow) due to high LDOS close the Fermi energy, State-II is less conducting (thin red arrow) due to low LDOS close the Fermi energy. When these states can be externally triggered by light, magnetic or electric field this molecule may function as a molecular switch. |
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An array of molecular switches serving as an array of information. High conducting State-I is 1 and low conducting state-II is 0. |
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© T. G. Gopakumar, IITK |
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Molecular Functional Materials Research Group |
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Molecular Switch |