Electron paramagnetic resonance of ensembles of phosphorus donors in silicon has been detected electrically with externally applied magnetic fields lower than 200 G. Because the spin Hamiltonian was dominated by the contact hyperfine term rather than by the Zeeman terms at such low magnetic fields, superposition states α | ↑↓ 〉 +β | ↓↑ 〉 and -β | ↑↓ 〉 +α | ↓↑ 〉 were formed between phosphorus electron and nuclear spins, and electron paramagnetic resonance transitions between these superposition states and | ↑↑ 〉 or | ↓↓ 〉 states are observed clearly. A continuous change of α and β with the magnetic field was observed with a behavior fully consistent with theory of phosphorus donors in silicon.
|ジャーナル||Physical Review B - Condensed Matter and Materials Physics|
|出版ステータス||Published - 2009 11月 24|
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