PHYSICAL REVIEW LETTERS

GIERZ I, CALEGARI F, AESCHLIMANN S, CERVANTES MC, CACHO C, CHAPMAN RT, SPRINGATE E, LINK S, STARKE U, AST CR, CAVALLERI A

NANO LETTERS

STRASSER C, LUDBROOK BM, LEVY G, MACDONALD AJ, BURKE SA, WEHLING TO, KERN K, DAMASCELLI A, AST CR