Semiconducting van der Waals Interfaces as Artificial Semiconductors

Nano Letters
Evgeniy PonomarevAlberto F Morpurgo

Abstract

Recent technical progress demonstrates the possibility of stacking together virtually any combination of atomically thin crystals of van der Waals bonded compounds to form new types of heterostructures and interfaces. As a result, there is the need to understand at a quantitative level how the interfacial properties are determined by the properties of the constituent 2D materials. We address this problem by studying the transport and optoelectronic response of two different interfaces based on transition-metal dichalcogenide monolayers, namely WSe2-MoSe2 and WSe2-MoS2. By exploiting the spectroscopic capabilities of ionic liquid gated transistors, we show how the conduction and valence bands of the individual monolayers determine the bands of the interface, and we establish quantitatively (directly from the measurements) the energetic alignment of the bands in the different materials as well as the magnitude of the interfacial band gap. Photoluminescence and photocurrent measurements allow us to conclude that the band gap of the WSe2-MoSe2 interface is direct in k space, whereas the gap of WSe2/MoS2 is indirect. For WSe2/MoSe2, we detect the light emitted from the decay of interlayer excitons and determine experimentally their ...Continue Reading

References

Jul 15, 1985·Physical Review. B, Condensed Matter·D A MillerC A Burrus
Mar 15, 1986·Physical Review. B, Condensed Matter·R T CollinsK Ploog
Mar 17, 2010·Nano Letters·Andrea SplendianiFeng Wang
Jan 15, 2011·Physical Review Letters·Kin Fai MakTony F Heinz
Dec 4, 2012·Nature Materials·Kin Fai MakJie Shan
Mar 16, 2013·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Moon Sung Kang, C Daniel Frisbie
May 17, 2013·Nature·L A PonomarenkoA K Geim
Jul 28, 2013·Nature·A K Geim, I V Grigorieva
Mar 29, 2014·Nano Letters·Sanghyun JoAlberto F Morpurgo
Aug 12, 2014·Nature Nanotechnology·Chul-Ho LeePhilip Kim
Aug 26, 2014·Nature Nanotechnology·Xiaoping HongFeng Wang
Feb 25, 2015·Nature Communications·Pasqual RiveraXiaodong Xu
Sep 24, 2015·Nature Communications·Zhe WangAlberto F Morpurgo
Nov 26, 2015·Nature Communications·Lin WangAlberto F Morpurgo
Feb 26, 2016·Science·Pasqual RiveraXiaodong Xu
May 4, 2016·Nano Letters·Yu Li HuangAndrew T S Wee
Jul 30, 2016·Science·K S NovoselovA H Castro Neto
Dec 23, 2016·Nano Letters·Jason S RossXiaodong Xu
Aug 7, 2017·Science Advances·Jonghwan KimFeng Wang
Feb 27, 2018·ACS Nano·Evgeniy PonomarevAlberto F Morpurgo
Mar 8, 2018·Nature Nanotechnology·Giuseppe IannacconeGianluca Fiori
Mar 8, 2018·Nature·Yuan CaoPablo Jarillo-Herrero

❮ Previous
Next ❯

Citations

Feb 6, 2020·Nature Materials·Nicolas UbrigAlberto F Morpurgo
Jan 11, 2020·Physical Review Letters·Ouri KarniTony F Heinz
Apr 4, 2021·Light, Science & Applications·Ying JiangAnlian Pan
Dec 25, 2019·Nano Letters·Bojja Aditya ReddyAlberto F Morpurgo

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.