Christmann, KlausHafner, JürgenKresse, GeorgLischka, MarkusSchmidt, Pia K.2004-12-032004-12-0320012001http://hdl.handle.net/2003/91510.17877/DE290R-3803enThe American Physical SocietyPhysical Review Letters530Coexistence of Atomic and Molecular Chemisorption States10.1103/PhysRevLett.87.096103article (journal)