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Title: A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases

Engineered lattices in condensed matter physics, such as cold-atom optical lattices or photonic crystals, can have properties that are fundamentally different from those of naturally occurring electronic crystals. We report a novel type of artificial quantum matter lattice. Our lattice is a multilayer heterostructure built from alternating thin films of topological and trivial insulators. Each interface within the heterostructure hosts a set of topologically protected interface states, and by making the layers sufficiently thin, we demonstrate for the first time a hybridization of interface states across layers. In this way, our heterostructure forms an emergent atomic chain, where the interfaces act as lattice sites and the interface states act as atomic orbitals, as seen from our measurements by angle-resolved photoemission spectroscopy. By changing the composition of the heterostructure, we can directly control hopping between lattice sites. We realize a topological and a trivial phase in our superlattice band structure. We argue that the superlattice may be characterized in a significant way by a one-dimensional topological invariant, closely related to the invariant of the Su-Schrieffer-Heeger model. Our topological insulator heterostructure demonstrates a novel experimental platform where we can engineer band structures by directly controlling how electrons hop between lattice sites.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [4] ; ORCiD logo [5] ;  [6] ;  [1] ;  [1] ;  [1] ;  [2] ;  [7] ;  [8] ;  [4] ;  [9] ;  [9] ;  [9] ;  [9] ;  [9] more »;  [4] ; ORCiD logo [5] ;  [8] ;  [2] ;  [10] « less
  1. Princeton Univ., Princeton, NJ (United States)
  2. Rutgers, The State Univ. of New Jersey, Piscataway, NJ (United States)
  3. South Univ. of Science and Technology of China, Guangdong (China)
  4. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  5. National Univ. of Singapore (Singapore)
  6. Univ. of Central Florida, Orlando, FL (United States)
  7. Paul Scherrer Inst. (PSI), Villigen (Switzerland); Univ. Wurzburg, Wurzburg (Germany)
  8. Diamond Light Source, Didcot (United Kingdom)
  9. Synchrotron SOLEIL, Gif-sur-Yvette (France)
  10. Princeton Univ., Princeton, NJ (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1419432

Belopolski, Ilya, Xu, Su -Yang, Koirala, Nikesh, Liu, Chang, Bian, Guang, Strocov, Vladimir N., Chang, Guoqing, Neupane, Madhab, Alidoust, Nasser, Sanchez, Daniel, Zheng, Hao, Brahlek, Matthew, Rogalev, Victor, Kim, Timur, Plumb, Nicholas C., Chen, Chaoyu, Bertran, Francois, Le Fevre, Patrick, Taleb-Ibrahimi, Amina, Asensio, Maria -Carmen, Shi, Ming, Lin, Hsin, Hoesch, Moritz, Oh, Seongshik, and Hasan, M. Zahid. A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases. United States: N. p., Web. doi:10.1126/sciadv.1501692.
Belopolski, Ilya, Xu, Su -Yang, Koirala, Nikesh, Liu, Chang, Bian, Guang, Strocov, Vladimir N., Chang, Guoqing, Neupane, Madhab, Alidoust, Nasser, Sanchez, Daniel, Zheng, Hao, Brahlek, Matthew, Rogalev, Victor, Kim, Timur, Plumb, Nicholas C., Chen, Chaoyu, Bertran, Francois, Le Fevre, Patrick, Taleb-Ibrahimi, Amina, Asensio, Maria -Carmen, Shi, Ming, Lin, Hsin, Hoesch, Moritz, Oh, Seongshik, & Hasan, M. Zahid. A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases. United States. doi:10.1126/sciadv.1501692.
Belopolski, Ilya, Xu, Su -Yang, Koirala, Nikesh, Liu, Chang, Bian, Guang, Strocov, Vladimir N., Chang, Guoqing, Neupane, Madhab, Alidoust, Nasser, Sanchez, Daniel, Zheng, Hao, Brahlek, Matthew, Rogalev, Victor, Kim, Timur, Plumb, Nicholas C., Chen, Chaoyu, Bertran, Francois, Le Fevre, Patrick, Taleb-Ibrahimi, Amina, Asensio, Maria -Carmen, Shi, Ming, Lin, Hsin, Hoesch, Moritz, Oh, Seongshik, and Hasan, M. Zahid. 2017. "A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases". United States. doi:10.1126/sciadv.1501692. https://www.osti.gov/servlets/purl/1419432.
@article{osti_1419432,
title = {A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases},
author = {Belopolski, Ilya and Xu, Su -Yang and Koirala, Nikesh and Liu, Chang and Bian, Guang and Strocov, Vladimir N. and Chang, Guoqing and Neupane, Madhab and Alidoust, Nasser and Sanchez, Daniel and Zheng, Hao and Brahlek, Matthew and Rogalev, Victor and Kim, Timur and Plumb, Nicholas C. and Chen, Chaoyu and Bertran, Francois and Le Fevre, Patrick and Taleb-Ibrahimi, Amina and Asensio, Maria -Carmen and Shi, Ming and Lin, Hsin and Hoesch, Moritz and Oh, Seongshik and Hasan, M. Zahid},
abstractNote = {Engineered lattices in condensed matter physics, such as cold-atom optical lattices or photonic crystals, can have properties that are fundamentally different from those of naturally occurring electronic crystals. We report a novel type of artificial quantum matter lattice. Our lattice is a multilayer heterostructure built from alternating thin films of topological and trivial insulators. Each interface within the heterostructure hosts a set of topologically protected interface states, and by making the layers sufficiently thin, we demonstrate for the first time a hybridization of interface states across layers. In this way, our heterostructure forms an emergent atomic chain, where the interfaces act as lattice sites and the interface states act as atomic orbitals, as seen from our measurements by angle-resolved photoemission spectroscopy. By changing the composition of the heterostructure, we can directly control hopping between lattice sites. We realize a topological and a trivial phase in our superlattice band structure. We argue that the superlattice may be characterized in a significant way by a one-dimensional topological invariant, closely related to the invariant of the Su-Schrieffer-Heeger model. Our topological insulator heterostructure demonstrates a novel experimental platform where we can engineer band structures by directly controlling how electrons hop between lattice sites.},
doi = {10.1126/sciadv.1501692},
journal = {Science Advances},
number = 3,
volume = 3,
place = {United States},
year = {2017},
month = {3}
}

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Colloquium: Topological insulators
journal, November 2010

Observation of a large-gap topological-insulator class with a single Dirac cone on the surface
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  • Xia, Y.; Qian, D.; Hsieh, D.
  • Nature Physics, Vol. 5, Issue 6, p. 398-402
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Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
journal, May 2009
  • Zhang, Haijun; Liu, Chao-Xing; Qi, Xiao-Liang
  • Nature Physics, Vol. 5, Issue 6, p. 438-442
  • DOI: 10.1038/nphys1270