Nichele Fabrizio, Drachmann Asbjørn C C, Whiticar Alexander M, O'Farrell Eoin C T, Suominen Henri J, Fornieri Antonio, Wang Tian, Gardner Geoffrey C, Thomas Candice, Hatke Anthony T, Krogstrup Peter, Manfra Michael J, Flensberg Karsten, Marcus Charles M
Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
Department of Physics and Astronomy and Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA.
Phys Rev Lett. 2017 Sep 29;119(13):136803. doi: 10.1103/PhysRevLett.119.136803. Epub 2017 Sep 27.
We report an experimental study of the scaling of zero-bias conductance peaks compatible with Majorana zero modes as a function of magnetic field, tunnel coupling, and temperature in one-dimensional structures fabricated from an epitaxial semiconductor-superconductor heterostructure. Results are consistent with theory, including a peak conductance that is proportional to tunnel coupling, saturates at 2e^{2}/h, decreases as expected with field-dependent gap, and collapses onto a simple scaling function in the dimensionless ratio of temperature and tunnel coupling.
我们报告了一项实验研究，该研究针对由外延半导体 - 超导体异质结构制成的一维结构中，与马约拉纳零模兼容的零偏置电导峰随磁场、隧道耦合和温度的标度关系。实验结果与理论相符，包括：峰电导与隧道耦合成正比，在(2e^{2}/h)处饱和，随磁场依赖能隙如预期那样减小，并且在温度与隧道耦合的无量纲比值上坍缩为一个简单的标度函数。
