Nonvolatile memory with molecule-engineered tunneling barriers

Details Nonvolatile memory with molecule-engineered tunneling barriers Nonvolatile memory with molecule-engineered tunneling barriers

2008-03-28

arxiv.org/abs/0803.4038v1

Appl. Phys. Lett. 92, 153109 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in Applied Physics Letters

Scientific paper

10.1063/1.2911741

We report a novel field-sensitive tunneling barrier by embedding C60 in SiO2 for nonvolatile memory applications. C60 is a better choice than ultra-small nanocrystals due to its monodispersion. Moreover, C60 provides accessible energy levels to prompt resonant tunneling through SiO2 at high fields. However, this process is quenched at low fields due to HOMO-LUMO gap and large charging energy of C60. Furthermore, we demonstrate an improvement of more than an order of magnitude in retention to program/erase time ratio for a metal nanocrystal memory. This shows promise of engineering tunnel dielectrics by integrating molecules in the future hybrid molecular-silicon electronics.

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