caa a22 4500 445383259 CHVBK 20180317143024.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10948-010-1091-3 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1091-3 Soodchomshom Bumned Thailand Center of Excellence in Physics, Commission Higher on Education, Ministry of Education, 10400, Bangkok, Thailand aut Tunneling Conductance in Strained Graphene-Based Superconductor: Effect of Asymmetric Weyl-Dirac Fermions [Elektronische Daten] [Bumned Soodchomshom] Based on the BTK theory, we investigate the tunneling conductance in uniaxially strained graphene-based normal metal (NG)/barrier (I)/superconductor (SG) junctions. In the present model, we assume that by depositing the conventional superconductor on the top of the uniaxially strained graphene, normal graphene may turn to superconducting graphene with the Cooper pairs formed by the asymmetric Weyl-Dirac electrons, the massless fermions with direction-dependent velocity. The highly asymmetrical velocity, v y /v x ≫1, may be created by strain in the zigzag direction near the transition point between gapless and gapped graphene. In the case of highly asymmetrical velocity, we find that the Andreev reflection strongly depends on the direction of strain, and the current perpendicular to the direction of strain can flow through the junction as if there were no barrier. Also, the current parallel to the direction of strain anomalously oscillates as a function of the gate voltage with very high frequency. Our predicted result is quite different from the feature of the quasiparticle tunneling in the unstrained graphene-based NG/I/SG conventional junction. This is because of the presence of the direction-dependent-velocity quasiparticles in the highly strained graphene system. Springer Science+Business Media, LLC, 2010 Tunneling conductance nationallicence Strained graphene nationallicence Specular Andreev reflection nationallicence N/I/S junction nationallicence Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1715-1724 1557-1939 24:5<1715 2011 24 10948 https://doi.org/10.1007/s10948-010-1091-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1091-3 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Soodchomshom Bumned Thailand Center of Excellence in Physics, Commission Higher on Education, Ministry of Education, 10400, Bangkok, Thailand aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1715-1724 1557-1939 24:5<1715 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer