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Hamer M, Tóvári E, Zhu M, Thompson MD, Mayorov A, Prance J, Lee Y, Haley RP, Kudrynskyi ZR, Patanè A, Terry D, Kovalyuk ZD, Ensslin K, Kretinin AV, Geim A, Gorbachev R. Gate-Defined Quantum Confinement in InSe-Based van der Waals Heterostructures. Nano Lett 2018; 18:3950-3955. [PMID: 29763556 DOI: 10.1021/acs.nanolett.8b01376] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Indium selenide, a post-transition metal chalcogenide, is a novel two-dimensional (2D) semiconductor with interesting electronic properties. Its tunable band gap and high electron mobility have already attracted considerable research interest. Here we demonstrate strong quantum confinement and manipulation of single electrons in devices made from few-layer crystals of InSe using electrostatic gating. We report on gate-controlled quantum dots in the Coulomb blockade regime as well as one-dimensional quantization in point contacts, revealing multiple plateaus. The work represents an important milestone in the development of quality devices based on 2D materials and makes InSe a prime candidate for relevant electronic and optoelectronic applications.
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Affiliation(s)
- Matthew Hamer
- School of Physics , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
- National Graphene Institute , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
| | - Endre Tóvári
- National Graphene Institute , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
| | - Mengjian Zhu
- School of Physics , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
| | - Michael D Thompson
- Department of Physics , University of Lancaster , Bailrigg , Lancaster , LA1 4YW , U.K
| | - Alexander Mayorov
- Centre for Advanced 2D Materials , National University of Singapore , 6 Science Drive 2 , Singapore 117546 , Singapore
| | - Jonathon Prance
- Department of Physics , University of Lancaster , Bailrigg , Lancaster , LA1 4YW , U.K
| | - Yongjin Lee
- Solid State Physics Laboratory , ETH Zurich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland
| | - Richard P Haley
- Department of Physics , University of Lancaster , Bailrigg , Lancaster , LA1 4YW , U.K
| | - Zakhar R Kudrynskyi
- School of Physics and Astronomy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Amalia Patanè
- School of Physics and Astronomy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Daniel Terry
- School of Physics , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
- National Graphene Institute , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
| | - Zakhar D Kovalyuk
- National Academy of Sciences of Ukraine , Institute for Problems of Materials Science , UA-58001 , Chernovtsy , Ukraine
| | - Klaus Ensslin
- Solid State Physics Laboratory , ETH Zurich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland
| | - Andrey V Kretinin
- National Graphene Institute , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
- School of Materials , University of Manchester , Oxford Road , Manchester M13 9PL , U.K
| | - Andre Geim
- School of Physics , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
| | - Roman Gorbachev
- School of Physics , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
- National Graphene Institute , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K
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