Issue |
EPL
Volume 117, Number 4, February 2017
|
|
---|---|---|
Article Number | 46001 | |
Number of page(s) | 4 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/117/46001 | |
Published online | 18 April 2017 |
Pressuring the low-temperature orthorhombic phase with a non-trivial topological state of Ru2Sn3 to room temperature
1 Institute of Physics and University of Chinese Academy of Sciences - Beijing 100190, China
2 Department of Chemistry, Princeton University - Princeton, NJ 08544, USA
3 Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201204, China
4 Collaborative Innovation Center of Quantum Matter - Beijing, 100190, China
5 University of Chinese Academy of Sciences - Beijing 100190, China
(a) llsun@iphy.ac.cn (corresponding author)
Received: 16 December 2016
Accepted: 31 March 2017
We report high-pressure studies of the structural stability of Ru2Sn3, a new type of three-dimensional topological insulator (3D-TI) with unique quasi–one-dimensional Dirac electron states throughout the surface Brillouin zone of its one-atmosphere low-temperature orthorhombic form. Our in-situ high-pressure synchrotron x-ray diffraction and electrical resistance measurements reveal that upon increasing pressure the tetragonal-to-orthorhombic phase shifts to higher temperature. We find that the stability of the orthorhombic phase that hosts the non-trivial topological ground state can be pushed up to room temperature by an applied pressure of ∼ 20 GPa. This is in contrast with the commonly known 3D-TIs whose ground state is usually destroyed under pressure. Our results indicate that pressure provides a possible pathway for realizing a room temperature topological insulating state in Ru2Sn3.
PACS: 62.50.-p – High-pressure effects in solids and liquids / 61.05.cp – X-ray diffraction
© EPLA, 2017
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.