Ultralong spin coherence time in isotopically engineered diamond
Ultralong spin coherence time in isotopically engineered diamond
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DOI：
10.1038/nmat2420
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发表时间：
2009-05-01
期刊：
影响因子：
41.2
通讯作者：
Wrachtrup, Joerg
中科院分区：
文献类型：
--
作者：
Balasubramanian, Gopalakrishnan;Neumann, Philipp;Wrachtrup, Joerg
随着量子力学进入应用和工程领域，材料科学面临着将物质设计到量子级纯度的必要性。对于这些材料，量子效应定义了它们的物理行为，并为应用开辟了全新的（量子）视角。碳基材料是特别好的例子，例如纳米管（1）或石墨烯（2）的迷人量子特性突出了这一点。在这里，我们展示了合成和应用的超纯同位素控制的单晶化学气相沉积（CVD）金刚石具有显着低浓度的顺磁性杂质。与C-13同位素相关的核自旋的含量被耗尽至0.3%，并且测量到其他顺磁缺陷的浓度为
As quantum mechanics ventures into the world of applications and engineering, materials science faces the necessity to design matter to quantum grade purity. For such materials, quantum effects define their physical behaviour and open completely new (quantum) perspectives for applications. Carbon-based materials are particularly good examples, highlighted by the fascinating quantum properties of, for example, nanotubes(1) or graphene(2). Here, we demonstrate the synthesis and application of ultrapure isotopically controlled single-crystal chemical vapour deposition (CVD) diamond with a remarkably low concentration of paramagnetic impurities. The content of nuclear spins associated with the C-13 isotope was depleted to 0.3% and the concentration of other paramagnetic defects was measured to be