Specular interband Andreev reflections at van der Waals interfaces between graphene and NbSe 2

Nature Physics

Volumn 12, Issue 4, 2016, Pages 328-332

  Efetov, D K ^a   Wang, L ^a   Handschin, C ^a   Efetov, K B ^b,c   Shuang, J ^d   Cava, R ^d   Taniguchi, T ^e   Watanabe, K ^e   Hone, J ^a   Dean, C R ^a   Kim, P ^a  

^a Department of Earth and Environmental Sciences   (United States)

^b RUHR UNIVERSITY BOCHUM   (Germany)

^c NATIONAL UNIVERSITY OF SCIENCE AND TECHNOLOGY MISIS   (Russian Federation)

^d PRINCETON UNIVERSITY   (United States)

^e NATIONAL INSTITUTE FOR MATERIALS SCIENCE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

FERMI LEVEL; NIOBIUM COMPOUNDS; SELENIUM COMPOUNDS; SUPERCONDUCTING MATERIALS; VAN DER WAALS FORCES;

ANDREEV PROCESS; ANDREEV REFLECTION; EFFECTIVE MASS; INCIDENT ELECTRONS; MEASUREMENTS OF; SUPERCONDUCTING GAPS; SUPERCONDUCTOR INTERFACE; VAN DER WAALS;

GRAPHENE;

EID: 84949293213     PISSN: 17452473     EISSN: 17452481     Source Type: Journal    
DOI: 10.1038/nphys3583     Document Type: Article

References (28)

1. Andreev, A. F. The thermal conductivity of the intermediate state in superconductors. J. Exp. Theor. Phys. 19, 1228-1231 (1964).
2. DeGennes, P. G. Superconductivity of Metals and Alloys (Benjamin, 1966).
3. Tinkham, M. Introduction to Superconductivity (McGraw Hill, 1996).
4. Beenakker, C.W. J. Specular Andreev reflection in graphene. Phys. Rev. Lett. 97, 067007 (2006).
5. Beenakker, C.W. J. Colloquium: Andreev reflection and Klein tunneling in graphene. Rev. Mod. Phys. 80, 1337-1354 (2008).
6. Klapwijk, T. M. Proximity effect from an Andreev perspective. J. Supercond. 17, 593-611 (2004).
7. Pannetier, B. & Courtois, H. Andreev reflection and proximity effect. J. Low Temp. Phys. 118, 599-615 (2000).
8. Blonder, G. E., Tinkham, M. & Klapwijk, T. M. Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion. Phys. Rev. B 25, 4515-4532 (1982).
9. Das Sarma, S., Adam, S., Hwang, E. H. & Rossi, E. Electronic transport in two-dimensional graphene. Rev. Mod. Phys. 83, 407-470 (2011).
10. Wallace, P. R. The band theory of graphite. Phys. Rev. 71, 622-634 (1947).
11. McCann, E. & Fal'ko, V. Landau-level degeneracy and quantum Hall effect in a graphite bilayer. Phys. Rev. Lett. 96, 086805 (2006).
12. Martin, J. et al. Observation of electron-hole puddles in graphene using a scanning single-electron transistor. Nature Phys. 4, 144-148 (2008).
13. Bolotin, K., Sikes, K., Hone, J., Stormer, H. & Kim, P. Temperature-dependent transport in suspended graphene. Phys. Rev. Lett. 101, 096802 (2008).
14. Dean, C. R. et al. Boron nitride substrates for high-quality graphene electronics. Nature Nanotech. 5, 722-726 (2010).
15. Xue, J. M. et al. Scanning tunnelling microscopy and spectroscopy of ultra-flat graphene on hexagonal boron nitride. Nature Mater. 10, 282-285 (2011).
16. Heersche, H. B., Jarillo-Herrero, P., Oostinga, J. B., Vandersypen, L. M. K. & Morpurgo, A. F. Bipolar supercurrent in graphene. Nature 446, 56-59 (2007).
17. Du, X., Skachko, I. & Andrei, E. Y. Josephson current and multiple Andreev reflections in graphene SNS junctions. Phys. Rev. B 77, 184507 (2008).
18. Miao, F. et al. Phase-coherent transport in graphene quantum billiards. Science 317, 1530-1533 (2007).
19. Popinciuc, M. et al. Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions. Phys. Rev. B 85, 205404 (2012).
20. Rickhaus, P.,Weiss, M., Marot, L. & Schonenberger, C. Quantum Hall effect in graphene with superconducting electrodes. Nano Lett. 12, 1942-1945 (2012).
21. Calado, V. E. et al. Ballistic Josephson junctions in edge-contacted graphene. Nature Nanotech. 10, 761-764 (2015).
22. Ben Shalom, M. et al. Proximity superconductivity in ballistic graphene, from Fabry-Perot oscillations to random Andreev states in magnetic field. Preprint at http://arXiv.org/abs/1504.03286 (2015).
23. Clayman, B. P. & Frindt, R. F. Superconducting energy gap of NbSe2. Solid State Commun. 9, 1881-1884 (1971).
24. Frindt, R. F. Superconductivity in ultrathin NbSe2 layers. Phys. Rev. Lett. 28, 299-301 (1972).
25. Staley, N. E. et al. Electric field effect on superconductivity in atomically thin flakes of NbSe2. Phys. Rev. B 80, 184505 (2009).
26. Geim, A. K. & Grigorieva, I. V. Van derWaals heterostructures. Nature 499, 419-425 (2013).
27. Efetov, D. K. Towards Inducing Superconductivity into Graphene PhD thesis, Univ. Columbia (2014).
28. Ludwig, T. Andreev reflection in bilayer graphene. Phys. Rev. B 75, 195322 (2007).