A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs. - Wu, Rong; Maudet, Florian; Phan, Thanh Luan; Hamouda, Wassim; Schroedter, Richard; Demirkol, Ahmet Samil; Tetzlaff, Ronald; Deshpande, Veeresh; Dubourdieu, Catherine (Advanced Functional Materials, 2026)