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- K. Xue, Boubacar TraorÃ©, +7 authors Yoshio Nishi
- IEEE Transactions on Electron Devices
- 2014

Through ab initio calculations, we propose that the conductive filaments in Pt/HfO2/Pt resistive random access memories are due to HfOx suboxides, possibly tetragonal, where x â‰¤ 1.5. Theâ€¦ (More)

- Kan-Hao Xue, Philippe Blaise, Leonardo R. C. Fonseca, Y. Nishi
- Physical review letters
- 2013

Tetragonal semimetallic phases are predicted for Hf(2)O(3) and Zr(2)O(3) using density functional theory. The structures belong to space group P4[over Â¯]m2 and are more stable than their corundumâ€¦ (More)

The continuous size downscaling of complementary metalâ€“oxideâ€“semiconductor (CMOS) transistors has led to the replacement of SiO2 with a HfO2-based high dielectric constant (or high-k) oxide, and theâ€¦ (More)

- Boubacar TraorÃ©, K. Xue, +8 authors Yoshio Nishi
- 2013 IEEE International Reliability Physicsâ€¦
- 2013

In this work we investigate in detail the effects of metal electrodes on the retention performances of HfOx RRAM devices. Motivated by our experimental data, we employ physics-based RRAM modeling andâ€¦ (More)

In the present computational study, we focus on graphene ribbons with zigzag edge atoms with their unsaturated bonds either dangling or terminated by various adsorbates ~H, O, or Cs!. Using thisâ€¦ (More)

- Tsanka Z. Todorova, Philippe Blaise, Elisa Vianello, Leonardo R. C. Fonseca
- 2013 Proceedings of the European Solid-Stateâ€¦
- 2013

Using first-principles calculations we have investigated the electronic properties of Ag<sub>2</sub>S, which is commonly employed as the active matrix in nonvolatile conductive-bridge random accessâ€¦ (More)

Spatially heterogeneous permeability data from several sites is reviewed. The spatial correlations in this data are valid (i.e. statistically signi cant) for short distances only. Multifractalâ€¦ (More)

Using a two-dimensional model, we have considered the effects of spatially changing fields and potentials, stochastic electron emission, and ballistic electron motion on the anode current and on theâ€¦ (More)

We have developed a method for calculating the field-emission current from a clean or adsorbate-covered metal surface using the transfer Hamiltonian method of Bardeen. The present formalism can beâ€¦ (More)

The purpose of this work is to present elements of a design tool for field emission displays using carbon nanotubes as emitters. We use a continuum model to describe the carbon nanotubes and we use aâ€¦ (More)