High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe
A decade of intense research on two-dimensional (2D) atomic crystals has revealed that their properties can differ greatly from those of the parent compound. These differences are governed by changes in the band structure due to quantum confinement and are most profound if the underlying lattice sym...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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Nature Publishing Group
2016
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| Online Access: | https://eprints.nottingham.ac.uk/38877/ |
| _version_ | 1848795710522130432 |
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| author | Bandurin, Denis A. Tyurnina, Anastasia V. Yu, Geliang L. Mishchenko, Artem Zólyomi, Viktor Morozov, Sergey V. Kumar, Roshan Krishna Gorbachev, Roman V. Kudrynskyi, Zakhar R. Pezzini, Sergio Kovalyuk, Zakhar D. Zeitler, Uli Novoselov, Konstantin S. Patanè, Amalia Eaves, Laurence Grigorieva, Irina V. Fal'ko, V.I. Geim, Andre K. Cao, Yang |
| author_facet | Bandurin, Denis A. Tyurnina, Anastasia V. Yu, Geliang L. Mishchenko, Artem Zólyomi, Viktor Morozov, Sergey V. Kumar, Roshan Krishna Gorbachev, Roman V. Kudrynskyi, Zakhar R. Pezzini, Sergio Kovalyuk, Zakhar D. Zeitler, Uli Novoselov, Konstantin S. Patanè, Amalia Eaves, Laurence Grigorieva, Irina V. Fal'ko, V.I. Geim, Andre K. Cao, Yang |
| author_sort | Bandurin, Denis A. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A decade of intense research on two-dimensional (2D) atomic crystals has revealed that their properties can differ greatly from those of the parent compound. These differences are governed by changes in the band structure due to quantum confinement and are most profound if the underlying lattice symmetry changes. Here we report a high-quality 2D electron gas in few-layer InSe encapsulated in hexagonal boron nitride under an inert atmosphere. Carrier mobilities are found to exceed 10₃ cm₂ V−¹ s−¹ and 10⁴cm₂ V−¹ s−¹ at room and liquid-helium temperatures, respectively, allowing the observation of the fully developed quantum Hall effect. The conduction electrons occupy a single 2D subband and have a small effective mass. Photoluminescence spectroscopy reveals that the bandgap increases by more than 0.5 eV with decreasing the thickness from bulk to bilayer InSe. The band-edge optical response vanishes in monolayer InSe, which is attributed to the monolayer’s mirror-plane symmetry. Encapsulated 2D InSe expands the family of graphene-like semiconductors and, in terms of quality, is competitive with atomically thin dichalcogenides and black phosphorus. |
| first_indexed | 2025-11-14T19:36:25Z |
| format | Article |
| id | nottingham-38877 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:36:25Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-388772020-05-04T18:20:23Z https://eprints.nottingham.ac.uk/38877/ High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe Bandurin, Denis A. Tyurnina, Anastasia V. Yu, Geliang L. Mishchenko, Artem Zólyomi, Viktor Morozov, Sergey V. Kumar, Roshan Krishna Gorbachev, Roman V. Kudrynskyi, Zakhar R. Pezzini, Sergio Kovalyuk, Zakhar D. Zeitler, Uli Novoselov, Konstantin S. Patanè, Amalia Eaves, Laurence Grigorieva, Irina V. Fal'ko, V.I. Geim, Andre K. Cao, Yang A decade of intense research on two-dimensional (2D) atomic crystals has revealed that their properties can differ greatly from those of the parent compound. These differences are governed by changes in the band structure due to quantum confinement and are most profound if the underlying lattice symmetry changes. Here we report a high-quality 2D electron gas in few-layer InSe encapsulated in hexagonal boron nitride under an inert atmosphere. Carrier mobilities are found to exceed 10₃ cm₂ V−¹ s−¹ and 10⁴cm₂ V−¹ s−¹ at room and liquid-helium temperatures, respectively, allowing the observation of the fully developed quantum Hall effect. The conduction electrons occupy a single 2D subband and have a small effective mass. Photoluminescence spectroscopy reveals that the bandgap increases by more than 0.5 eV with decreasing the thickness from bulk to bilayer InSe. The band-edge optical response vanishes in monolayer InSe, which is attributed to the monolayer’s mirror-plane symmetry. Encapsulated 2D InSe expands the family of graphene-like semiconductors and, in terms of quality, is competitive with atomically thin dichalcogenides and black phosphorus. Nature Publishing Group 2016-11-21 Article PeerReviewed Bandurin, Denis A., Tyurnina, Anastasia V., Yu, Geliang L., Mishchenko, Artem, Zólyomi, Viktor, Morozov, Sergey V., Kumar, Roshan Krishna, Gorbachev, Roman V., Kudrynskyi, Zakhar R., Pezzini, Sergio, Kovalyuk, Zakhar D., Zeitler, Uli, Novoselov, Konstantin S., Patanè, Amalia, Eaves, Laurence, Grigorieva, Irina V., Fal'ko, V.I., Geim, Andre K. and Cao, Yang (2016) High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe. Nature Nanotechnology . ISSN 1748-3395 http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2016.242.html doi:10.1038/nnano.2016.242 doi:10.1038/nnano.2016.242 |
| spellingShingle | Bandurin, Denis A. Tyurnina, Anastasia V. Yu, Geliang L. Mishchenko, Artem Zólyomi, Viktor Morozov, Sergey V. Kumar, Roshan Krishna Gorbachev, Roman V. Kudrynskyi, Zakhar R. Pezzini, Sergio Kovalyuk, Zakhar D. Zeitler, Uli Novoselov, Konstantin S. Patanè, Amalia Eaves, Laurence Grigorieva, Irina V. Fal'ko, V.I. Geim, Andre K. Cao, Yang High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe |
| title | High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe |
| title_full | High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe |
| title_fullStr | High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe |
| title_full_unstemmed | High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe |
| title_short | High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe |
| title_sort | high electron mobility, quantum hall effect and anomalous optical response in atomically thin inse |
| url | https://eprints.nottingham.ac.uk/38877/ https://eprints.nottingham.ac.uk/38877/ https://eprints.nottingham.ac.uk/38877/ |