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arXiv · 1407.6792

Host isotope mass effects on the hyperfine interaction of group-V donors in silicon

T. Sekiguchi·A. M. Tyryshkin·S. Tojo·E. Abe·R. Mori·H. Riemann·N. V. Abrosimov·P. Becker·H. -J. Pohl·J. W. Ager·E. E. Haller·M. L. W. Thewalt·J. J. L. Morton·S. A. Lyon·K. M. Itoh
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Abstract

The effects of host isotope mass on the hyperfine interaction of group-V donors in silicon are revealed by pulsed electron nuclear double resonance (ENDOR) spectroscopy of isotopically engineered Si single crystals. Each of the hyperfine-split P-31, As-75, Sb-121, Sb-123, and Bi-209 ENDOR lines splits further into multiple components, whose relative intensities accurately match the statistical likelihood of the nine possible average Si masses in the four nearest-neighbor sites due to random occupation by the three stable isotopes Si-28, Si-29, and Si-30. Further investigation with P-31 donors shows that the resolved ENDOR components shift linearly with the bulk-averaged Si mass.

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T. Sekiguchi, A. M. Tyryshkin, S. Tojo, E. Abe, R. Mori, H. Riemann, N. V. Abrosimov, P. Becker, H. -J. Pohl, J. W. Ager, E. E. Haller, M. L. W. Thewalt, J. J. L. Morton, S. A. Lyon, K. M. Itoh. 2014-07-25. Host isotope mass effects on the hyperfine interaction of group-V donors in silicon. https://doi.org/10.1103/physrevb.90.121203

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