Electron Spin Coherence and Electron Nuclear Double Resonance of Bi Donors in Natural Si
Electron Spin Coherence and Electron Nuclear Double Resonance of Bi Donors in Natural Si
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DOI：
10.1103/physrevlett.105.067601
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发表时间：
2010-08-06
影响因子：
8.6
通讯作者：
Morton, John J. L.
中科院分区：
文献类型：
--
作者：
George, Richard E.;Witzel, Wayne;Morton, John J. L.
硅的捐助者对新兴量子技术抱有相当大的希望，因为它们具有独特的长电子自旋相干时间。硅中的铋给体与被广泛研究的V族给体（如磷）在几个重要方面有所不同：它们具有最强的结合能（70.98 meV），较大的核自旋（I = 9/2）和强超精细耦合常数（a = 1475.4 MHz）。这些更大的能量尺度使我们能够对描述谱扩散机制的理论模型进行详细的测试，该机制已知是控制天然硅中P供体的电子自旋退相干的。我们报道了铋给体在200 MHz至1.4 GHz范围内的电子-核双共振谱，并证实了在这些更高频率下电子和核自旋自由度之间的相干转移是可能的。
Donors in silicon hold considerable promise for emerging quantum technologies, due to their uniquely long electron spin coherence times. Bismuth donors in silicon differ from more widely studied group V donors, such as phosphorous, in several significant respects: They have the strongest binding energy (70.98 meV), a large nuclear spin (I = 9/2), and a strong hyperfine coupling constant (A = 1475.4 MHz). These larger energy scales allow us to perform a detailed test of theoretical models describing the spectral diffusion mechanism that is known to govern the electron spin decoherence of P donors in natural silicon. We report the electron-nuclear double resonance spectra of the Bi donor, across the range 200 MHz to 1.4 GHz, and confirm that coherence transfer is possible between electron and nuclear spin degrees of freedom at these higher frequencies.