Vibrational Properties of Borophene Determined

  • Author: Liam Critchley
  • Published: 10 April 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: ACS Nano/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Vibrational Properties of Borophene Determined

Borophene is a 2D material composed only of boron atoms. It adopts a triangular lattice (pictured) with periodic hole arrays. Compared to more common 2D materials such as graphene, the properties of borophene have not been as extensively studied.

Kehui Wu, Chinese Academy of Sciences, Beijing, and Songshan Lake Materials Laboratory, Dongguan, China, Lan Chen, Ping-Heng Tan, Chinese Academy of Sciences, and colleagues have used in-situ Raman spectroscopy, tip-enhanced Raman spectroscopy (TERS), scanning tunneling microscopy (STM) and density functional theory (DFT) calculations to determine the vibrational and electron-phonon coupling (EPC) properties of borophene. All experiments were carried out in an ultra-high vacuum (UHV) STM-TERS system that was combined with a molecular beam epitaxy system (MBE). The borophene was synthesized in the MBE chamber before being transferred to the various analysis chambers.

The researchers studied the β12 and χ3 phases of borophene, which differ by the arrangements of "holes" in the lattice. The team found an electron-phonon coupling strength of 0.53–0.59. The χ3 phase was found to be inherently metallic in nature. There is also the potential for borophene to show superconductivity, as its β12 and χ3 phases have estimated critical temperatures (Tc) of 7.1 and 9.8 K, respectively. The measured vibrational and EPC properties can help researchers to further study the mechanical, electronic, and intrinsic superconducting properties of borophene.


Article Views: 1763

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH