Electron paramagnetic resonance spectroscopy of lithium donors in monoisotopic silicon
| Autor: | A. V. Soukhorukov, Davud V. Guseinov, Alexandr A. Ezhevskii, Anatoly V. Gusev |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Silicon Doping Analytical chemistry chemistry.chemical_element Condensed Matter Physics Spectral line Electronic Optical and Magnetic Materials law.invention Tetragonal crystal system Nuclear magnetic resonance chemistry law Lithium Monoisotopic mass Electrical and Electronic Engineering Electron paramagnetic resonance Hyperfine structure |
| Zdroj: | Physica B: Condensed Matter. 404:5063-5065 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2009.08.225 |
| Popis: | Electron paramagnetic resonance (X-band EPR) spectra are reported for lithium-related donors in monoisotopic silicon. High resolution EPR spectra of lithium donor centers in monoisotopic silicon, enriched by 28 Si isotope (99.99%) with very narrow individual lines are observed. In monoisotopic silicon sample ( 28 Si enriched floating zone silicon with low concentration of lithium ~10 16 cm −3 ), the trigonal EPR spectrum, with well resolved 7 Li hyperfine structure is recorded in the temperature range 3.5–20 K. This spectrum was attributed to LiO complex. At high concentration of lithium (about 10 18 cm −3 ) in monoisotopic silicon two types of spectra are observed. The trigonal one has the same feature as for low concentration of lithium with g -values: g ∥ =1.9974 and g ⊥ =1.9989. Another spectrum consists of two lines and has tetragonal symmetry with g ∥ =1.9992 and g ⊥ =1.9983. This spectrum is more intensive than the trigonal one and has no resolved hyperfine structure probably due to time averaging of the hyperfine interaction caused by hopping motion of electrons. |
| Databáze: | OpenAIRE |
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