Screw dislocations: The key to high critical currents in YBa2Cu3O7?



Research News: Defects in high-Tc superconductors recently observed with the aid of scanning tunneling microscopy could hold the key to increased critical current densities, a crucial requirement for power applications. The observation, by teams from the Los Alamos National Laboratory, and IBM Zurich, and origin of the defects (see Figure) are discussed.

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