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100 1 _ |a Wirths, Stephan
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245 _ _ |a High- k Gate Stacks on Low Bandgap Tensile Strained Ge and GeSn Alloys for Field-Effect Transistors
260 _ _ |a Washington, DC
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520 _ _ |a We present the epitaxial growth of Ge and Ge0.94Sn0.06 layers with 1.4% and 0.4% tensile strain, respectively, by reduced pressure chemical vapor deposition on relaxed GeSn buffers and the formation of high-k/metal gate stacks thereon. Annealing experiments reveal that process temperatures are limited to 350 °C to avoid Sn diffusion. Particular emphasis is placed on the electrical characterization of various high-k dielectrics, as 5 nm Al2O3, 5 nm HfO2, or 1 nmAl2O3/4 nm HfO2, on strained Ge and strained Ge0.94Sn0.06. Experimental capacitance–voltage characteristics are presented and the effect of the small bandgap, like strong response of minority carriers at applied field, are discussed via simulations.
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700 1 _ |a Stange, Daniela
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700 1 _ |a Pampillon, Maria
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700 1 _ |a Tiedemann, Andreas
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700 1 _ |a Mussler, Gregor
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700 1 _ |a Fox, Alfred
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700 1 _ |a Breuer, Uwe
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700 1 _ |a Baert, Bruno
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700 1 _ |a San Andrés, Enrique
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700 1 _ |a Nguyen, Ngoc D.
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700 1 _ |a Hartmann, Jean-Michel
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700 1 _ |a Ikonic, Zoran
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700 1 _ |a Mantl, Siegfried
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700 1 _ |a Buca, Dan Mihai
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773 _ _ |a 10.1021/am5075248
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856 4 _ |u http://pubs.acs.org/doi/abs/10.1021/am5075248
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