Contact induced spin relaxation in graphene spin valves with Al2O3 and MgO tunnel barriers
Source abstract
Abstract
We investigate spin relaxation in graphene by systematically comparing the roles of spin absorption, other contact-induced effects (e.g., fringe fields), and bulk spin relaxation for graphene spin valves with MgO barriers, Al2O3 barriers, and transparent contacts. We obtain effective spin lifetimes by fitting the Hanle spin precession data with two models that include or exclude the effect of spin absorption. Results indicate that additional contact-induced spin relaxation other than spin absorption dominates the contact effect. For tunneling contacts, we find reasonable agreement between the two models with median discrepancy of ∼20% for MgO and ∼10% for Al2O3.
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Research context
OpenAlex topics: Graphene research and applications · Quantum and electron transport phenomena · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of California 1 Program of Materials Science and Engineering, , Riverside, California 92521, USA
University of California 2 Department of Physics and Astronomy, , Riverside, California 92521, USA
University of California 3 Department of Electrical and Computer Engineering, , Riverside, California 92521, USA
The Ohio State University 4 Department of Physics, , Columbus, Ohio 43210, USA
Funding
DARPA/MARCO STARnet · National Science Foundation · Office of Naval Research
References (33)
Show source-provided references
1. Phys. Rev. B · 2006 · 74 · 15542610.1103/PhysRevB.74.155426 ↗
2. Phys. Rev. B · 2006 · 74 · 16531010.1103/PhysRevB.74.165310 ↗
3. Phys. Rev. B · 2007 · 75 · 041401(R)10.1103/PhysRevB.75.041401 ↗
4. Nat. Phys. · 2007 · 3 · 19210.1038/nphys544 ↗
5. Phys. Rev. Lett. · 2009 · 103 · 14680110.1103/PhysRevLett.103.146801 ↗
6. Nat. Nano · 2014 · 9 · 79410.1038/nnano.2014.214 ↗
7. Nature · 2007 · 448 · 57110.1038/nature06037 ↗
8. Phys. Rev. B · 2009 · 80 · 241403(R)10.1103/PhysRevB.80.241403 ↗
9. Phys. Rev. B · 2009 · 80 · 21442710.1103/PhysRevB.80.214427 ↗
10. Adv. Funct. Mater. · 2009 · 19 · 371110.1002/adfm.200900989 ↗
11. Phys. Rev. Lett. · 2010 · 104 · 18720110.1103/PhysRevLett.104.187201 ↗
12. Phys. Rev. Lett. · 2010 · 105 · 16720210.1103/PhysRevLett.105.167202 ↗
13. Phys. Rev. Lett. · 2011 · 107 · 04720710.1103/PhysRevLett.107.047207 ↗
14. Appl. Phys. Lett. · 2009 · 94 · 22210910.1063/1.3147203 ↗
15. Phys. Rev. Lett. · 2011 · 107 · 04720610.1103/PhysRevLett.107.047206 ↗
16. Phys. Rev. Lett. · 1985 · 55 · 179010.1103/PhysRevLett.55.1790 ↗
17. Phys. Rev. B · 2012 · 86 · 23540810.1103/PhysRevB.86.235408 ↗
18. Phys. Rev. B · 2011 · 84 · 05441010.1103/PhysRevB.84.054410 ↗
19. Phys. Rev. Lett. · 2005 · 94 · 17660110.1103/PhysRevLett.94.176601 ↗
20. Phys. Rev. B · 2014 · 89 · 16541710.1103/PhysRevB.89.165417 ↗
21. Appl. Phys. Lett. · 2011 · 98 · 13311110.1063/1.3571553 ↗
22. Phys. Rev. B · 2013 · 88 · 16140510.1103/PhysRevB.88.161405 ↗
23. Phys. Rev. B · 2014 · 90 · 16540310.1103/PhysRevB.90.165403 ↗
24. Phys. Rev. X · 2012 · 2 · 04101710.1103/PhysRevX.2.041017 ↗
25. Phys. Rev. B · 2009 · 80 · 03543710.1103/PhysRevB.80.035437 ↗
26. Nanoscale · 2013 · 5 · 190210.1039/c2nr32972g ↗
27. Nature · 2002 · 416 · 71310.1038/416713a ↗
28. Phys. Rev. B · 2014 · 89 · 08130810.1103/PhysRevB.89.081308 ↗
29. Phys. Rev. B · 2014 · 89 · 24543610.1103/PhysRevB.89.245436 ↗
30. Phys. Rev. B · 2015 · 91 · 24140710.1103/PhysRevB.91.241407 ↗
31. Appl. Phys. Lett. · 2010 · 97 · 09250210.1063/1.3476339 ↗
32. Appl. Phys. Lett. · 2012 · 101 · 20310410.1063/1.4765348 ↗
33. Sci. Rep. · 2015 · 5 · 1433210.1038/srep14332 ↗