Emergence of Topologically Nontrivial Spin-Polarized States in a Segmented Linear Chain
Abstract
The synthesis of new materials with novel or useful properties is one of the most important drivers in the fields of condensed matter physics and materials science. Discoveries of this kind are especially significant when they point to promising future basic research and applications. Van der Waals bonded materials comprised of lower-dimensional building blocks have been shown to exhibit emergent properties when isolated in an atomically thin form. Here, we report the discovery of a transition metal chalcogenide in a heretofore unknown segmented linear chain form, where basic building blocks each consisting of two hafnium atoms and nine tellurium atoms (Hf2Te9) are van der Waals bonded end-to-end. First-principle calculations based on density functional theory reveal striking crystal-symmetry-related features in the electronic structure of the segmented chain, including giant spin splitting and nontrivial topological phases of selected energy band states. In this work, atomic-resolution scanning transmission electron microscopy reveals single segmented Hf2Te9 chains isolated within the hollow cores of carbon nanotubes, with a structure consistent with theoretical predictions. Van der Waals-bonded segmented linear chain transition metal chalcogenide materials could open up new opportunities in low-dimensional, gate-tunable, magnetic and topological crystalline systems.
- Authors:
-
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). The Molecular Foundry (TMF) and National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
- OSTI Identifier:
- 1601819
- Grant/Contract Number:
- AC02-05CH11231; DMR-1807233; DMR-1926004
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 20; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Pham, Thang, Oh, Sehoon, Stonemeyer, Scott, Shevitski, Brian, Cain, Jeffrey D., Song, Chengyu, Ercius, Peter, Cohen, Marvin L., and Zettl, Alex. Emergence of Topologically Nontrivial Spin-Polarized States in a Segmented Linear Chain. United States: N. p., 2020.
Web. doi:10.1103/PhysRevLett.124.206403.
Pham, Thang, Oh, Sehoon, Stonemeyer, Scott, Shevitski, Brian, Cain, Jeffrey D., Song, Chengyu, Ercius, Peter, Cohen, Marvin L., & Zettl, Alex. Emergence of Topologically Nontrivial Spin-Polarized States in a Segmented Linear Chain. United States. https://doi.org/10.1103/PhysRevLett.124.206403
Pham, Thang, Oh, Sehoon, Stonemeyer, Scott, Shevitski, Brian, Cain, Jeffrey D., Song, Chengyu, Ercius, Peter, Cohen, Marvin L., and Zettl, Alex. Wed .
"Emergence of Topologically Nontrivial Spin-Polarized States in a Segmented Linear Chain". United States. https://doi.org/10.1103/PhysRevLett.124.206403. https://www.osti.gov/servlets/purl/1601819.
@article{osti_1601819,
title = {Emergence of Topologically Nontrivial Spin-Polarized States in a Segmented Linear Chain},
author = {Pham, Thang and Oh, Sehoon and Stonemeyer, Scott and Shevitski, Brian and Cain, Jeffrey D. and Song, Chengyu and Ercius, Peter and Cohen, Marvin L. and Zettl, Alex},
abstractNote = {The synthesis of new materials with novel or useful properties is one of the most important drivers in the fields of condensed matter physics and materials science. Discoveries of this kind are especially significant when they point to promising future basic research and applications. Van der Waals bonded materials comprised of lower-dimensional building blocks have been shown to exhibit emergent properties when isolated in an atomically thin form. Here, we report the discovery of a transition metal chalcogenide in a heretofore unknown segmented linear chain form, where basic building blocks each consisting of two hafnium atoms and nine tellurium atoms (Hf2Te9) are van der Waals bonded end-to-end. First-principle calculations based on density functional theory reveal striking crystal-symmetry-related features in the electronic structure of the segmented chain, including giant spin splitting and nontrivial topological phases of selected energy band states. In this work, atomic-resolution scanning transmission electron microscopy reveals single segmented Hf2Te9 chains isolated within the hollow cores of carbon nanotubes, with a structure consistent with theoretical predictions. Van der Waals-bonded segmented linear chain transition metal chalcogenide materials could open up new opportunities in low-dimensional, gate-tunable, magnetic and topological crystalline systems.},
doi = {10.1103/PhysRevLett.124.206403},
journal = {Physical Review Letters},
number = 20,
volume = 124,
place = {United States},
year = {Wed May 20 00:00:00 EDT 2020},
month = {Wed May 20 00:00:00 EDT 2020}
}
Web of Science
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