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- Publisher Website: 10.1038/ncomms9180
- Scopus: eid_2-s2.0-84940706335
- WOS: WOS:000363017100007
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Article: Observation of Intervalley Quantum Interference in Epitaxial Monolayer Tungsten Diselenide
Title | Observation of Intervalley Quantum Interference in Epitaxial Monolayer Tungsten Diselenide |
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Authors | |
Issue Date | 2015 |
Publisher | Macmillan Publishers Limited. The Journal's web site is located at http://www.nature.com/ncomms/index.html |
Citation | Nature Communications, 2015, v. 6, article no. 8180 How to Cite? |
Abstract | © 2015 Macmillan Publishers Limited. The extraordinary electronic structures of monolayer transition metal dichalcogenides, such as the spin-valley-coupled band edges, have sparked great interest for potential spintronic and valleytronic applications based on these two-dimensional materials. In this work, we report the experimental observation of quasi-particle interference patterns in monolayer WSe 2 using low-temperature scanning tunnelling spectroscopy. We observe intervalley quantum interference involving the Q valleys in the conduction band due to spin-conserving scattering processes, while spin-flipping intervalley scattering is absent. Our results establish unequivocally the presence of spin-valley coupling and affirm the large spin splitting at the Q valleys. Importantly, the inefficient spin-flipping scattering implies long valley and spin lifetime in monolayer WSe 2, which is a key figure of merit for valley-spintronic applications. |
Persistent Identifier | http://hdl.handle.net/10722/218813 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Liu, H | - |
dc.contributor.author | CHEN, J | - |
dc.contributor.author | Yu, H | - |
dc.contributor.author | Yang, F | - |
dc.contributor.author | JIAO, L | - |
dc.contributor.author | Liu, GB | - |
dc.contributor.author | Ho, WK | - |
dc.contributor.author | Gao, CL | - |
dc.contributor.author | Jia, JF | - |
dc.contributor.author | Yao, W | - |
dc.contributor.author | Xie, MH | - |
dc.date.accessioned | 2015-09-18T06:54:07Z | - |
dc.date.available | 2015-09-18T06:54:07Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Nature Communications, 2015, v. 6, article no. 8180 | - |
dc.identifier.uri | http://hdl.handle.net/10722/218813 | - |
dc.description.abstract | © 2015 Macmillan Publishers Limited. The extraordinary electronic structures of monolayer transition metal dichalcogenides, such as the spin-valley-coupled band edges, have sparked great interest for potential spintronic and valleytronic applications based on these two-dimensional materials. In this work, we report the experimental observation of quasi-particle interference patterns in monolayer WSe 2 using low-temperature scanning tunnelling spectroscopy. We observe intervalley quantum interference involving the Q valleys in the conduction band due to spin-conserving scattering processes, while spin-flipping intervalley scattering is absent. Our results establish unequivocally the presence of spin-valley coupling and affirm the large spin splitting at the Q valleys. Importantly, the inefficient spin-flipping scattering implies long valley and spin lifetime in monolayer WSe 2, which is a key figure of merit for valley-spintronic applications. | - |
dc.language | eng | - |
dc.publisher | Macmillan Publishers Limited. The Journal's web site is located at http://www.nature.com/ncomms/index.html | - |
dc.relation.ispartof | Nature Communications | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Observation of Intervalley Quantum Interference in Epitaxial Monolayer Tungsten Diselenide | - |
dc.type | Article | - |
dc.identifier.email | Liu, H: liuhenry@HKUCC-COM.hku.hk | - |
dc.identifier.email | Yu, H: yuhongyi@hku.hk | - |
dc.identifier.email | Ho, WK: howk@hku.hk | - |
dc.identifier.email | Yao, W: wangyao@hku.hk | - |
dc.identifier.email | Xie, MH: mhxie@hku.hk | - |
dc.identifier.authority | Yao, W=rp00827 | - |
dc.identifier.authority | Xie, MH=rp00818 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1038/ncomms9180 | - |
dc.identifier.scopus | eid_2-s2.0-84940706335 | - |
dc.identifier.hkuros | 253527 | - |
dc.identifier.volume | 6 | - |
dc.identifier.spage | article no. 8180 | - |
dc.identifier.epage | article no. 8180 | - |
dc.identifier.eissn | 2041-1723 | - |
dc.identifier.isi | WOS:000363017100007 | - |
dc.identifier.issnl | 2041-1723 | - |