Structural evolution of Re (0001) thin films grown on Nb (110) surfaces by molecular beam epitaxy

Physics – Condensed Matter – Materials Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

5 pages, 7 figures, corrected references

Scientific paper

10.1063/1.3511347

The heteroepitaxial growth of Re (0001) films on Nb (110) surfaces has been investigated. Nb/Re bilayers were grown on A-plane sapphire -- alpha-Al2O3 (11-20) -- by molecular beam epitaxy. While Re grew with a (0001) surface, the in-plane epitaxial relationship with the underlying Nb could be best described as a combination of Kurdjumov-Sachs and Nishiyama-Wassermann orientations. This relationship was true regardless of Re film thickness. However, an evolution of the surface morphology with increasing Re thickness was observed, indicative of a Stranski-Krastanov growth mode. Re (0001) layers less than 15 nm thick were atomically smooth, with a typical rms roughness of less than 0.5 nm, while thicker films showed granular surface structures. And despite the presence of a substantial lattice misfit, the Re layer strain diminished rapidly and the Re lattice was fully relaxed by about 20 nm. The strain-free and atomically smooth surface of thin Re overlayers on Nb is ideal for the subsequent epitaxial growth of ultra-thin oxide tunnel barriers. Utilizing bcc/hcp (or bcc/fcc) heteroepitaxial pairs in advanced multi-layer stacks may enable the growth of all-epitaxial superconductor/insulator/superconductor trilayers for Josephson junction-based devices and circuits.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Structural evolution of Re (0001) thin films grown on Nb (110) surfaces by molecular beam epitaxy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Structural evolution of Re (0001) thin films grown on Nb (110) surfaces by molecular beam epitaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structural evolution of Re (0001) thin films grown on Nb (110) surfaces by molecular beam epitaxy will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-704367

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.