Departamento de Física Aplicada, Universidad de Alicante, San Vicente del Raspeig, Spain.
Phys Rev Lett. 2011 Aug 12;107(7):076804. doi: 10.1103/PhysRevLett.107.076804. Epub 2011 Aug 9.
Detection of a single nuclear spin constitutes an outstanding problem in different fields of physics such as quantum computing or magnetic imaging. Here we show that the energy levels of a single nuclear spin can be measured by means of inelastic electron tunneling spectroscopy (IETS). We consider two different systems, a magnetic adatom probed with scanning tunneling microscopy and a single Bi dopant in a silicon nanotransistor. We find that the hyperfine coupling opens new transport channels which can be resolved at experimentally accessible temperatures. Our simulations evince that IETS yields information about the occupations of the nuclear spin states, paving the way towards transport-detected single nuclear spin resonance.
检测单个核自旋是量子计算或磁成像等不同物理领域的一个突出问题。在这里，我们表明，可以通过非弹性电子隧道谱（IETS）来测量单个核自旋的能级。我们考虑了两个不同的系统，一个是用扫描隧道显微镜探测的磁吸附原子，另一个是在硅纳米晶体管中的单个 Bi 掺杂剂。我们发现超精细耦合开辟了新的传输通道，这些通道可以在实验可达到的温度下得到分辨。我们的模拟表明，IETS 提供了关于核自旋态占据的信息，为传输检测的单核自旋共振铺平了道路。
