Berlin 2018 – scientific programme

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DS: Fachverband Dünne Schichten

DS 31: Poster Session II

DS 31.15: Poster

Thursday, March 15, 2018, 11:15–13:15, Poster F

Synthesis and characterization of transition-metal germanides — •Yufang Xie^{1, 2}, Ye Yuan^{1, 2}, René Hübner¹, Jörg Grenzer¹, Mao Wang^{1, 2}, Manfred Helm^{1, 2}, Shengqiang Zhou¹, and Slawomir Prucnal¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, D-01328 Dresden, Germany — ²Technische Universität Dresden, D-01062 Dresden, Germany

Si was sufficient to fulfil the requirements of microelectronic industry for more than five decades. Further progress based on the miniaturisation of transistors is challenging. Therefore new materials and concepts are considered for the next generation of nanoelectronics. In this work, we present the formation of transition-metal germanides epitaxially grown on Ge wafer. Those materials have great promise for both the ohmic contacts to n-type Ge with extremely low specific contact resistivity and spintronics. The transition-metal germanides are synthesized by metal sputtering on Ge followed by millisecond range flash lamp annealing which is suitable for larger-area fabrication and compatible with CMOS technology. On one hand, orthorhombic NiGe whose contact resistivity is only around 1.2*10-6 Ω cm2, is beneficial for achieving high-performance Ge-based nano-electronic devices. On the other hand, cubic FeGe with B20 phase is a Skyrmion-carrier material attractive for spintronics. In summary, the epitaxial transition-metal germanides materials can be obtained by a novel epitaxial approach which provides insight to their technological usage.