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Title: Cubic-structured HfO2 with optimized doping of lanthanum for higher dielectric constant
Authors: He, W. 
Zhang, L.
Chan, D.S.H. 
Cho, B.-J.
Keywords: Crystallization
Cubic structure
Hafnium oxide
High-κ dielectric
Lanthanum oxide
Issue Date: 2009
Citation: He, W., Zhang, L., Chan, D.S.H., Cho, B.-J. (2009). Cubic-structured HfO2 with optimized doping of lanthanum for higher dielectric constant. IEEE Electron Device Letters 30 (6) : 623-625. ScholarBank@NUS Repository.
Abstract: It is demonstrated that HfO2 films can have much higher dielectric-constant values than the usual reported value of 20-24 by optimized incorporation of lanthanum element and crystallization to cubic structure. When HfO2 with 8% La is crystallized into cubic structure, the film exhibits the κ value of ∼38 which is the highest among ever reported HfO2-based high-κ dielectrics. The increased value of HfO2 with 8% La enables the leakage current to be reduced more than one order of magnitude lower, compared to amorphous-phase HfO2 under the same electric field. The dependence of film thickness and annealing temperature on the cubic crystallization is also reported. © 2009 IEEE.
Source Title: IEEE Electron Device Letters
ISSN: 07413106
DOI: 10.1109/LED.2009.2020613
Appears in Collections:Staff Publications

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