Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges
Using scanning tunneling microscopy and spectroscopy, we have studied the local density of states (LDOS) of graphene over step edges in boron nitride. Long-wavelength oscillations in the LDOS are observed with maxima parallel to the step edge. Their wavelength and amplitude are controlled by the ene...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society (APS)
2012
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| Online Access: | http://hdl.handle.net/1721.1/69608 https://orcid.org/0000-0001-9703-6525 https://orcid.org/0000-0001-8217-8213 |
| _version_ | 1826205145127452672 |
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| author | Xue, Jiamin Watanabe, K. Taniguchi, T. LeRoy, Brian J. Sanchez-Yamagishi, Javier D. Jarillo-Herrero, Pablo |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Xue, Jiamin Watanabe, K. Taniguchi, T. LeRoy, Brian J. Sanchez-Yamagishi, Javier D. Jarillo-Herrero, Pablo |
| author_sort | Xue, Jiamin |
| collection | MIT |
| description | Using scanning tunneling microscopy and spectroscopy, we have studied the local density of states (LDOS) of graphene over step edges in boron nitride. Long-wavelength oscillations in the LDOS are observed with maxima parallel to the step edge. Their wavelength and amplitude are controlled by the energy of the quasiparticles allowing a direct probe of the graphene dispersion relation. We also observe a faster decay of the LDOS oscillations away from the step edge than in conventional metals. This is due to the chiral nature of the Dirac fermions in graphene. |
| first_indexed | 2024-09-23T13:07:28Z |
| format | Article |
| id | mit-1721.1/69608 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:07:28Z |
| publishDate | 2012 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/696082022-09-28T12:08:07Z Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges Xue, Jiamin Watanabe, K. Taniguchi, T. LeRoy, Brian J. Sanchez-Yamagishi, Javier D. Jarillo-Herrero, Pablo Massachusetts Institute of Technology. Department of Physics Jarillo-Herrero, Pablo Sanchez-Yamagishi, Javier D. Jarillo-Herrero, Pablo Using scanning tunneling microscopy and spectroscopy, we have studied the local density of states (LDOS) of graphene over step edges in boron nitride. Long-wavelength oscillations in the LDOS are observed with maxima parallel to the step edge. Their wavelength and amplitude are controlled by the energy of the quasiparticles allowing a direct probe of the graphene dispersion relation. We also observe a faster decay of the LDOS oscillations away from the step edge than in conventional metals. This is due to the chiral nature of the Dirac fermions in graphene. National Science Foundation (U.S.) (Grant No. EECS/0925152) National Science Foundation (U.S.) (Grant No. CAREER DMR/0953784) United States. Dept. of Energy. Division of Materials Sciences and Engineering (Grant No. DE-SC0001819) United States. Office of Naval Research. Multidisciplinary University Research Initiative (2009 US Office of Naval Research Multi University Research Initiative (MURI) on Graphene Advanced Terahertz Engineering (Gate) at MIT, Harvard, and Boston University) 2012-03-08T19:53:09Z 2012-03-08T19:53:09Z 2012-01 2011-08 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/69608 Xue, Jiamin et al. “Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges.” Physical Review Letters 108.1 (2012): n. pag. Web. 8 Mar. 2012. © 2012 American Physical Society https://orcid.org/0000-0001-9703-6525 https://orcid.org/0000-0001-8217-8213 en_US http://dx.doi.org/10.1103/PhysRevLett.108.016801 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Xue, Jiamin Watanabe, K. Taniguchi, T. LeRoy, Brian J. Sanchez-Yamagishi, Javier D. Jarillo-Herrero, Pablo Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges |
| title | Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges |
| title_full | Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges |
| title_fullStr | Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges |
| title_full_unstemmed | Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges |
| title_short | Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges |
| title_sort | long wavelength local density of states oscillations near graphene step edges |
| url | http://hdl.handle.net/1721.1/69608 https://orcid.org/0000-0001-9703-6525 https://orcid.org/0000-0001-8217-8213 |
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