PMID- 31922842
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20200113
LR  - 20200113
IS  - 1079-7114 (Electronic)
IS  - 0031-9007 (Linking)
VI  - 123
IP  - 24
DP  - 2019 Dec 13
TI  - Infrared Interlayer Exciton Emission in MoS_2/WSe_2 Heterostructures.
PG  - 247402
LID - 10.1103/PhysRevLett.123.247402 [doi]
AB  - We report light emission around 1 eV (1240 nm) from heterostructures of MoS_2 
      and WSe_2 transition metal dichalcogenide monolayers. We identify its origin in 
      an interlayer exciton (ILX) by its wide spectral tunability under an out-of-plane 
      electric field. From the static dipole moment of the state, its temperature and 
      twist-angle dependence, and comparison with electronic structure calculations, we 
      assign this ILX to the fundamental interlayer transition between the K valleys in 
      this system. Our findings gain access to the interlayer physics of the 
      intrinsically incommensurate MoS_2/WSe_2 heterostructure, including moire and 
      valley pseudospin effects, and its integration with silicon photonics and optical 
      fiber communication systems operating at wavelengths longer than 1150 nm.
FAU - Karni, Ouri
AU  - Karni O
AD  - Department of Applied Physics, Stanford University, Stanford, California, 94305, 
      USA.
FAU - Barre, Elyse
AU  - Barre E
AD  - Department of Electrical Engineering, Stanford University, Stanford, California, 
      94305, USA.
FAU - Lau, Sze Cheung
AU  - Lau SC
AD  - Department of Applied Physics, Stanford University, Stanford, California, 94305, 
      USA.
FAU - Gillen, Roland
AU  - Gillen R
AD  - Department Physik, Friedrich-Alexander-Universitat Erlangen-Nurnberg, 
      Staudstrasse 7, 91058 Erlangen, Germany.
FAU - Ma, Eric Yue
AU  - Ma EY
AD  - Department of Applied Physics, Stanford University, Stanford, California, 94305, 
      USA.
AD  - SLAC National Accelerator Laboratory, Menlo Park, California, 94025, USA.
FAU - Kim, Bumho
AU  - Kim B
AD  - Department of Mechanical Engineering, Columbia University, New York, New York 
      10027, USA.
FAU - Watanabe, Kenji
AU  - Watanabe K
AD  - National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, 
      Japan.
FAU - Taniguchi, Takashi
AU  - Taniguchi T
AD  - National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, 
      Japan.
FAU - Maultzsch, Janina
AU  - Maultzsch J
AD  - Department Physik, Friedrich-Alexander-Universitat Erlangen-Nurnberg, 
      Staudstrasse 7, 91058 Erlangen, Germany.
FAU - Barmak, Katayun
AU  - Barmak K
AD  - Department of Applied Physics and Applied Mathematics, Columbia University, New 
      York, New York 10027, USA.
FAU - Page, Ralph H
AU  - Page RH
AD  - Department of Applied Physics, Stanford University, Stanford, California, 94305, 
      USA.
AD  - SLAC National Accelerator Laboratory, Menlo Park, California, 94025, USA.
FAU - Heinz, Tony F
AU  - Heinz TF
AD  - Department of Applied Physics, Stanford University, Stanford, California, 94305, 
      USA.
AD  - SLAC National Accelerator Laboratory, Menlo Park, California, 94025, USA.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Phys Rev Lett
JT  - Physical review letters
JID - 0401141
SB  - IM
EDAT- 2020/01/11 06:00
MHDA- 2020/01/11 06:01
CRDT- 2020/01/11 06:00
PHST- 2019/07/30 00:00 [received]
PHST- 2020/01/11 06:00 [entrez]
PHST- 2020/01/11 06:00 [pubmed]
PHST- 2020/01/11 06:01 [medline]
AID - 10.1103/PhysRevLett.123.247402 [doi]
PST - ppublish
SO  - Phys Rev Lett. 2019 Dec 13;123(24):247402. doi: 10.1103/PhysRevLett.123.247402.