Investigation of Supercurrent in the Quantum Hall Regime in Graphene Josephson Junctions
作者： Anne W. Draelos , Ming Tso Wei , Andrew Seredinski , Chung Ting Ke , Yash Mehta
DOI: 10.1007/S10909-018-1872-9
关键词:
摘要: In this study, we examine multiple encapsulated graphene Josephson junctions to determine which mechanisms may be responsible for the supercurrent observed in quantum Hall (QH) regime. Rectangular with various widths and lengths were studied identify parameters affect occurrence of QH supercurrent. We also additional samples where region is extended beyond contacts on one side, making that edge mesa significantly longer than opposite edge. This done order distinguish two potential mechanisms: (a) supercurrents independently flowing along both non-contacted edges mesa, (b) sides being coupled by hybrid electron–hole modes superconductor/graphene boundary. The appears suppressed junctions, suggesting latter mechanism.
springer.com
harvard.edu
arxiv-vanity.com
arxiv.org 参考文章(32)
P Joyez, D Vion, M Götz, MH Devoret, D Esteve, The Josephson Effect in Nanoscale Tunnel Junctions Journal of Superconductivity. ,vol. 12, pp. 757- 766 ,(1999) , 10.1023/A:1007733009637
A. A. Golubov, M. Yu. Kupriyanov, E. Il’ichev, The current-phase relation in Josephson junctions Reviews of Modern Physics. ,vol. 76, pp. 411- 469 ,(2004) , 10.1103/REVMODPHYS.76.411
M. T. Allen, O. Shtanko, I. C. Fulga, A. R. Akhmerov, K. Watanabe, T. Taniguchi, P. Jarillo-Herrero, L. S. Levitov, A. Yacoby, Spatially resolved edge currents and guided-wave electronic states in graphene Nature Physics. ,vol. 12, pp. 128- 133 ,(2016) , 10.1038/NPHYS3534
V. E. Calado, S. Goswami, G. Nanda, M. Diez, A. R. Akhmerov, K. Watanabe, T. Taniguchi, T. M. Klapwijk, L. M. K. Vandersypen, Ballistic Josephson junctions in edge-contacted graphene. Nature Nanotechnology. ,vol. 10, pp. 761- 764 ,(2015) , 10.1038/NNANO.2015.156
A. V. Svidzinsky, T. N. Antsygina, E. N. Bratus', Concerning the theory of the Josephson effect in pure SNS junctions Journal of Low Temperature Physics. ,vol. 10, pp. 131- 136 ,(1973) , 10.1007/BF00655245
R. C. Dynes, T. A. Fulton, Supercurrent density distribution in Josephson junctions Physical Review B. ,vol. 3, pp. 3015- 3023 ,(1971) , 10.1103/PHYSREVB.3.3015
L. Wang, I. Meric, P. Y. Huang, Q. Gao, Y. Gao, H. Tran, T. Taniguchi, K. Watanabe, L. M. Campos, D. A. Muller, J. Guo, P. Kim, J. Hone, K. L. Shepard, C. R. Dean, One-dimensional electrical contact to a two-dimensional material. Science. ,vol. 342, pp. 614- 617 ,(2013) , 10.1126/SCIENCE.1244358
Peter Rickhaus, Romain Maurand, Ming-Hao Liu, Markus Weiss, Klaus Richter, Christian Schönenberger, Ballistic interferences in suspended graphene Nature Communications. ,vol. 4, pp. 2342- ,(2013) , 10.1038/NCOMMS3342
J. A. M. van Ostaay, A. R. Akhmerov, C. W. J. Beenakker, Spin-triplet supercurrent carried by quantum Hall edge states through a Josephson junction Physical Review B. ,vol. 83, pp. 195441- ,(2011) , 10.1103/PHYSREVB.83.195441
D. Vion, M. Götz, P. Joyez, D. Esteve, M. H. Devoret, Thermal Activation above a Dissipation Barrier: Switching of a Small Josephson Junction. Physical Review Letters. ,vol. 77, pp. 3435- 3438 ,(1996) , 10.1103/PHYSREVLETT.77.3435