A ballistic two-dimensional-electron-gas Andreev interferometer

作者：Amado M^*; Fornieri A; Biasiol G; Sorba L; Giazotto F

来源：Applied Physics Letters, 2014, 104(24): 242604.

DOI：10.1063/1.4884952

We report the realization and investigation of a ballistic Andreev interferometer based on an InAs two dimensional electron gas coupled to a superconducting Nb loop. We observe strong magnetic modulations in the voltage drop across the device due to quasiparticle interference within the weak-link. The interferometer exhibits flux noise down to similar to 80 mu Phi(0)/root Hz and a robust behavior in temperature with voltage oscillations surviving up to similar to 7K. Besides this remarkable performance, the device represents a crucial first step for the realization of a fully-tunable ballistic superconducting magnetometer and embodies a potential advanced platform for the investigation of Majorana bound states, non-local entanglement of Cooper pairs, as well as the manipulation and control of spin triplet correlations.

• 出版日期2014-6-16