Multiscale Modeling of Graphene-Metal Contacts

By T. Cusati, Gianluca Fiori1, A. Fortunelli2, Giuseppe Iannaccone1

1. Dipartimento di Ingegneria dell’Informazione Università di Pisa, Pisa, Italy 2. CNR Institute for Chemical and Physical Processes, Pisa, Italy

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Abstract

IWCE 2015 presentation.

The quality of contacts between metals and two- dimensional materials is a critical aspect for the performance of transistors based on two-dimensional materials. In this talk we focus on an approach to multiscale modeling of graphene- metal contacts, considering both chemisorbed and physisorbed materials. We show that it is possible to use density functional simulations of contacts to extract a set of physical properties that enable accurate device-level simulations at a higher level of abstraction. We also show that – properly evaluated - the intrinsic conductance of graphene- metal contacts is higher than that predicted in previous studies.

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Cite this work

Researchers should cite this work as follows:

  • Cusati, T., "Multiscale Modeling of Graphene-Metal Contacts," in Computational Electronics (IWCE) 2015 International Workshop on, DOI: Not available in IEEE Xplore digital library. Full Website Here

  • T. Cusati; Gianluca Fiori; A. Fortunelli; Giuseppe Iannaccone (2016), "Multiscale Modeling of Graphene-Metal Contacts," https://nanohub.org/resources/22918.

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Time

Location

North Ballroom, PMU, Purdue University, West Lafayette, IN

Tags

Multiscale Modeling of Graphene-Metal Contacts
by: T. Cusati, Gianluca Fiori, A. Fortunelli, Giuseppe Iannaccone
  • Multiscale modeling of graphene-metal contacts 1. Multiscale modeling of graphen… 0
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  • Motivation 2. Motivation 25.191858525191858
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  • Considered metal-graphene structures 3. Considered metal-graphene stru… 92.926259592926257
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  • 4 types of metals are considered 4. 4 types of metals are consider… 125.59225892559226
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  • Considered metal-graphene structures 5. Considered metal-graphene stru… 157.19052385719053
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  • Scattering problem with PWCOND 6. Scattering problem with PWCOND 199.5995995995996
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  • Transmission as a function of different 7. Transmission as a function of … 235.16850183516851
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  • Untitled: Slide 8 8. Untitled: Slide 8 304.07073740407077
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  • Untitled: Slide 9 9. Untitled: Slide 9 337.13713713713713
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  • Untitled: Slide 10 10. Untitled: Slide 10 382.64931598264934
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  • Untitled: Slide 11 11. Untitled: Slide 11 397.53086419753089
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  • Ballistic resistance depends strongly on the distance between the two metal regions 12. Ballistic resistance depends s… 400.83416750083416
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  • Ballistic resistance of graphene can be high … 13. Ballistic resistance of graphe… 491.991991991992
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  • Comparison between 14. Comparison between "Contact" r… 530.13013013013017
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  • Comparison between 15. Comparison between "Contact" r… 604.13747080413748
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  • Two-parameter contact model 16. Two-parameter contact model 630.53053053053054
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  • So What is the best resistance you can get ? 17. So What is the best resistance… 679.7797797797798
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  • So What is the best resistance you can get ? 18. So What is the best resistance… 693.893893893894
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  • So What is the best resistance you can get ? 19. So What is the best resistance… 719.98665331998666
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  • So What is the best resistance you can get ? 20. So What is the best resistance… 730.63063063063066
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  • Asymptotic intrinsic contact resistance 21. Asymptotic intrinsic contact r… 736.73673673673682
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  • Asymptotic intrinsic contact resistance 22. Asymptotic intrinsic contact r… 791.257924591258
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  • Conclusion 23. Conclusion 792.49249249249249
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