Abnormal topological domains in a high-density array of ferroelectric nanodots

What is it about?

Our studies of domain structure in nanodot arrays by vector PFM identify four types of topological domain states, including convergent and divergent domains with upward and downward polarization, as well as double-central and triplecentral domains. These center domains can be switched reversibly under the electric field generated by the biased PFM tip, and their stability can be preserved by compensating the polarization charge with the accumulated charge. These findings, therefore, indicate that the topological domain state is highly stable in discrete nanodots, and the key parameters controlling the size of the opological domain are identified.

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