Devices, Nanofunctions, and Unconventional Applications of 2D Materials

  • Authors:
    Eric Pop (Stanford)
    Publication ID:
    P090947
    Publication Type:
    Presentation
    Received Date:
    19-May-2017
    Last Edit Date:
    22-May-2017
    Research:
    2385.004 (Stanford University)

Abstract

Two-dimensional (2D) materials have unusual and anisotropic electrical and thermal properties. This talk will present recent highlights from our atoms-to-systems research on graphene, BN, and transition metal dichalcogenides (TMDs).

We have studied graphene from basic transport measurements and simulations, to the recent wafer-scale demonstration of analog dot product nanofunctions for neural networks [1]. We are also growing and evaluating the electrical and thermal properties of TMDs including MoS2, HfSe2, and WTe2 [2,3]. Recent results include low-resistance contacts [4], 10-nm scale transistors, and high-field transport studies including velocity saturation. We have also examined the anisotropic thermal conductivity of these materials, for unconventional applications to thermal switches and thermal routing. If time permits, I will discuss “bottom up” thermal management starting at dimensions comparable to the electron and phonon mean free paths (~100 nm), where quasi-ballistic heat flow effects dominate [5].

Our studies reveal fundamental limits and new applications that could be achieved through the co-design and heterogeneous integration of 2D nanomaterials.

[1] N.C. Wang, S.K. Gonugondla, I. Nahlus, N.R. Shanbhag, E. Pop, "GDOT: A Graphene-Based Nanofunction for Dot-Product Computation," IEEE VLSI Tech. Symp., Jun 2016, Honolulu HI

[2] K.K.H. Smithe, C.D. English, S.V. Suryavanshi, E. Pop, "Enhanced Electrical Transport and Performance Projections of Synthetic Monolayer MoS2 Devices," arXiv:1608.00987 (2016)

[3] M.J. Mleczko, R.L. Xu, K. Okabe, H.-H. Kuo, I.R. Fisher, H.-S.P. Wong, Y. Nishi, E. Pop, "High Current Density and Low Thermal Conductivity of Atomically Thin Semimetallic WTe2," ACS Nano 10, 7507-7514 (2016)

[4] C.D. English, G. Shine, V.E. Dorgan, K.C. Saraswat, E. Pop, "Improved Contacts to MoS2 Transistors by Ultra-High Vacuum Metal Deposition," Nano Lett. 16, 3824-3820 (2016)

[5] M.-H. Bae, Z. Li, Z. Aksamija, P.N. Martin, F. Xiong, Z.-Y. Ong, I. Knezevic, E. Pop, "Ballistic to Diffusive Crossover of Heat Flow in Graphene Ribbons," Nature Comm. 4, 1734 (2013)

4819 Emperor Blvd, Suite 300 Durham, NC 27703 Voice: (919) 941-9400 Fax: (919) 941-9450

Important Information for the SRC website. This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.