Electrical Reservoirs for Bilayer Excitons

Physical Review Letters
Ming Xie, A H MacDonald

Abstract

The ground state of two-dimensional (2D) electron systems with equal low densities of electrons and holes in nearby layers is an exciton fluid. We show that a reservoir for excitons can be established by contacting the two layers separately and maintaining the chemical potential difference at a value less than the spatially indirect band gap, thereby avoiding the presence of free carriers in either layer. Equilibration between the exciton fluid and the contacts proceeds via a process involving virtual intermediate states in which an unpaired electron or hole virtually occupies a free carrier state in one of the 2D layers. We derive an approximate relationship between the exciton-contact equilibration rate and the electrical conductances between the contacts and individual 2D layers when the contact chemical potentials align with the free-carrier bands, and explain how electrical measurements can be used to measure thermodynamic properties of the exciton fluids.

References

Feb 27, 1995·Physical Review Letters·X ZhuT M Rice
Oct 5, 2002·Science·Hui DengYoshihisa Yamamoto
Sep 29, 2006·Nature·J KasprzakLe Si Dang
Oct 15, 2008·Physical Review Letters·J J BaumbergN Grandjean
Aug 8, 2009·Nature Nanotechnology·Jilin XiaNongjian Tao
Mar 23, 2012·Nature·A A HighA C Gossard
Apr 19, 2012·Nano Letters·A A HighA C Gossard
Dec 4, 2012·Nature Materials·Kin Fai MakJie Shan
May 17, 2013·Nature·Christian SchneiderSven Höfling
Jul 28, 2013·Nature·A K Geim, I V Grigorieva
Aug 27, 2013·Nature Communications·Yehiel ShiloRonen Rapaport
Dec 10, 2013·Physical Review Letters·Diana Y QiuSteven G Louie
Jun 28, 2014·Physical Review Letters·Pallab BhattacharyaAyan Das
Jul 30, 2014·Nature Communications·M M FoglerK S Novoselov
May 17, 2013·Physical Review Letters·Pallab BhattacharyaJunseok Heo
Feb 25, 2015·Nature Communications·Pasqual RiveraXiaodong Xu
Mar 24, 2015·Nano Letters·Maurizia PalummoJeffrey C Grossman
May 18, 2016·Nano Letters·Kobi CohenRonen Rapaport
Jul 19, 2016·Nature Materials·Daniele Sanvitto, Stéphane Kéna-Cohen
Jul 30, 2016·Science·K S NovoselovA H Castro Neto
Jan 21, 2017·Physical Review Letters·Yongbao SunKeith A Nelson
Apr 6, 2017·Physical Chemistry Chemical Physics : PCCP·Kuan ZhouRoger K Lake
May 5, 2017·Nature Communications·Archana RajaAlexey Chernikov
May 16, 2018·Nature Communications·E V CalmanA K Geim

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Citations

Aug 28, 2019·Proceedings of the National Academy of Sciences of the United States of America·Yotam Mazuz-HarpazRonen Rapaport

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