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SUMMARY:(SP Wednesday Workshop) - Proximity-Induced Superconductivity in G
 raphene - Mr Kai Yuan Huang\, University of Cambridge
DTSTART:20140528T131500Z
DTEND:20140528T141500Z
UID:TALK52468@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:Graphene-based Josephson junctions provide a platform for inve
 stigating phase coherent transport in graphene\, a strictly two-dimensiona
 l system\, where the Josephson Effect requires both phase coherence and ti
 me reversal symmetry [1]. Graphene possesses unique physical properties su
 ch as low-energy linear dispersion relation\, vanishing density of states 
 at the Dirac point and tunable carrier density (and type)\, making it rela
 tively straightforward to probe the Josephson phase diagram as well as int
 eresting to study the transport in a 2D system of relativistic particles. 
 Recently\, the field of graphene-superconductor hybrid structures has attr
 acted much attention due to the relevance of Dirac point physics to topolo
 gical insulators\, applications of graphene-based junctions to superconduc
 ting qubits\, and the presence of specular Andreev reflection at zero dopi
 ng in the ballistic regime [2] (which is also related to the realization o
 f electron optics).\nIn this workshop\, I will discuss transport measureme
 nts taken from our first batch of graphene Josephson junctions fabricated 
 on Si/SiO2 substrate\, where the graphene flakes are contacted by supercon
 ducting niobium nitride electrodes with a critical temperature of approxim
 ately 6K. In addition\, I will talk about potential future work for our re
 search and how we can achieve a supercurrent through graphene.\n\n1.	Heers
 che\, H. et al.\, Manifestations of phase coherent transport in \ngraphene
 \, Eur. Phys. J. Special Topics\, 148\, 27-37 (2007)\n2.	Beenakker\, C. W.
 \, Specular Andreev Reflection in Graphene\, Phys. Rev. \nLett.\, 97\, 067
 007 (2006)\n3.	Doh\, Y. J. et al.\, Quantum Interference Effects in InAs S
 emiconductor \nNanowires\, Journal of Korean Physical Society\, 54\, 135-1
 39 (2009)\n
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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