000058649 001__ 58649 000058649 005__ 20170831220643.0 000058649 037__ $$aTAZ-TFM-2016-811 000058649 041__ $$aeng 000058649 1001_ $$aSchubert, Sonja 000058649 24200 $$aRocksalt ionic insulators for atomic scale ferroelectrics 000058649 24500 $$aFerroelectricidad en la escala atómica basada en aislantes iónicos tipos salroca 000058649 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2016 000058649 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/ 000058649 520__ $$aFerroelectricity at atomic scale has been recently shown in ultrathin layers of NaCl on Cu2N/Cu(001). The origin was suppossed to be the strain of NaCl. In this thesis, the two rocksalt compounds KBr and LiCl were investigated with respect to their growth behaviour on Cu(001) and the polar insulator Cu2N/Cu(001). Furthermore the electronic structure and the ferroelectric behaviour of KBr is described. In gap-states due to the hybridisation with Cu(001) were found at KBr/Cu(001), which are suppressed due to the adding of Cu2N. Surprisingly, also without a strain, ultrathin layers of KBr on Cu2N/Cu(001)shows ferroelectrism. In this thesis we applied the following experimental techniques: Scanning Tunneling Microscopy(STM), Scanning Tunneling Spectroscopy(STS), Atomic Force Microscopy(AFM), Kelvin-Probe-Spectroscopy and Low Energy Electron Refraction(LEED). LiCl was investigated at ultra high vacuum and room temperature, KBr at ultra high vacuum and 4K. 000058649 521__ $$aMáster Universitario en Física y Tecnologías Físicas 000058649 540__ $$aDerechos regulados por licencia Creative Commons 000058649 700__ $$aSerrate Donoso, David$$edir. 000058649 700__ $$aPiantek, Marten$$edir. 000058649 7102_ $$aUniversidad de Zaragoza$$bFísica de la Materia Condensada$$cFísica de la Materia Condensada 000058649 8560_ $$f731343@celes.unizar.es 000058649 8564_ $$s7526903$$uhttps://zaguan.unizar.es/record/58649/files/TAZ-TFM-2016-811.pdf$$yMemoria (eng) 000058649 909CO $$ooai:zaguan.unizar.es:58649$$pdriver$$ptrabajos-fin-master 000058649 950__ $$a 000058649 951__ $$adeposita:2017-01-26 000058649 980__ $$aTAZ$$bTFM$$cCIEN