Epitaxial Growth of High Curie-Temperature Ge1-xMnx quantum dots on Si(001) by auto-assembly

Luong Thi Kim Phuong, An Manh Nguyen
Author affiliations

Authors

  • Luong Thi Kim Phuong Aix Marseille University, CNRS, CINaM-UMR 7325, F-13288 Marseille, France and Hong Duc University, 565 Quang Trung, Thanh Hoa
  • An Manh Nguyen Hong Duc University, 565 Quang Trung, Thanh Hoa

DOI:

https://doi.org/10.15625/0868-3166/24/1/3477

Keywords:

Ferromagnetic quantum dots, high Curie temperature, Stranski-Krastanov growth, spintronics

Abstract

We report on successful growth of epitaxial and high Curie-temperature Ge1-xMnx quantum dots on Si (001) substrates using the auto-assembled approach. By reducing the growth temperature down to 400 °C, we show that the Mn diffusion into the Si substrate can be neglected. No indication of secondary phases or clusters was observed. Ge1-xMnx quantum dots were found to be epitaxial and perfectly coherent to the Si substrate. We also observe ferromagnetic ordering in quantum dots at a temperature higher 320 K. It is believed that single-crystalline quantum dots exhibiting a high Curie temperature are potential candidates for spin injection at temperatures higher than room temperature.

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Published

23-03-2014

How to Cite

[1]
L. T. K. Phuong and A. M. Nguyen, Epitaxial Growth of High Curie-Temperature Ge1-xMnx quantum dots on Si(001) by auto-assembly, Comm. Phys. 24 (2014) 69. DOI: https://doi.org/10.15625/0868-3166/24/1/3477.

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Received 11-12-2013
Published 23-03-2014