Formation of an extended 'CO''SI' IND. 2' thin nanohexagons array coherently buried in silicon single crystal - Kellermann, Guinther; Montoro, Luciano A; Ramirez, Antonio J; Giovanetti, Lisandro J; Claro, Paula C dos Santos; Requejo, Félix G; Zhang, Liang; Craievich, Aldo Felix (Applied physics letters, 2012)