Nakayama, Kosuke ORCID: 0000-0003-2462-2253, Souma, Seigo, Trang, Chi Xuan, Takane, Daichi, Chen, Chaoyu, Avila, Jose, Takahashi, Takashi, Sasaki, Satoshi, Segawa, Kouji, Carmen Asensio, Maria, Ando, Yoichi ORCID: 0000-0002-3553-3355 and Sato, Takafumi ORCID: 0000-0002-4544-5463 (2019). Nanomosaic of Topological Dirac States on the Surface of Pb5Bi24Se41 Observed by Nano-ARPES. Nano Lett., 19 (6). S. 3737 - 3743. WASHINGTON: AMER CHEMICAL SOC. ISSN 1530-6992

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Abstract

We have performed scanning angle-resolved photoemission spectroscopy with a nanometer-sized beam spot (nano-ARPES) on the cleaved surface of Pb5Bi24Se41, which is a member of the (PbSe)(5)(Bi2Se3)(3m) homologous series (PSBS) with m = 4 consisting of alternate stacking of the topologically trivial insulator PbSe bilayer and four quintuple layers (QLs) of the topological insulator Bi2Se3. This allows us to visualize a mosaic of topological Dirac states at a nanometer scale coming from the variable thickness of the Bi2Se3 nanoislands (1-3 QLs) that remain on top of the PbSe layer after cleaving the PSBS crystal, because the local band structure of topological origin changes drastically with the thickness of the Bi2Se3 nanoislands. A comparison of the local band structure with that in ultrathin Bi2Se3 films on Si(111) gives us further insights into the nature of the observed topological states. This result demonstrates that nano-ARPES is a very useful tool for characterizing topological heterostructures.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Nakayama, KosukeUNSPECIFIEDorcid.org/0000-0003-2462-2253UNSPECIFIED
Souma, SeigoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Trang, Chi XuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takane, DaichiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chen, ChaoyuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Avila, JoseUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takahashi, TakashiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sasaki, SatoshiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Segawa, KoujiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carmen Asensio, MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ando, YoichiUNSPECIFIEDorcid.org/0000-0002-3553-3355UNSPECIFIED
Sato, TakafumiUNSPECIFIEDorcid.org/0000-0002-4544-5463UNSPECIFIED
URN: urn:nbn:de:hbz:38-146380
DOI: 10.1021/acs.nanolett.9b00875
Journal or Publication Title: Nano Lett.
Volume: 19
Number: 6
Page Range: S. 3737 - 3743
Date: 2019
Publisher: AMER CHEMICAL SOC
Place of Publication: WASHINGTON
ISSN: 1530-6992
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CROSSOVER; TRANSPORTMultiple languages
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14638

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