Three-dimensional buckled honeycomb boron lattice with vacancies as anintermediate phase on the transition pathway from alpha-B to gamma-B

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486228.do
DOI
10.1038/am.2017.98
Title
Three-dimensional buckled honeycomb boron lattice with vacancies as anintermediate phase on the transition pathway from alpha-B to gamma-B
Description
This work was supported by Samsung Science and Technology Foundationunder Grant No. SSTFBA1401-08 and by the Brain Korea 21 PLUS Project ofKorea Government.
abstract
In the phase diagram of elemental boron, an unknown high-pressure form was identified as gamma-orthorhombic boron (gamma-B-28), provoking studies of the extraordinary properties of its main building blocks, B-12 icosahedra and B-2 dumbbells. Although two low-pressure phases, alpha- and beta-rhombohedral boron (alpha-B-12 and beta-B-106), are also composed of icosahedra, the detailed kinetics and mechanisms of the structural transition from alpha-B-12 or beta-B-106 to gamma-B-28 remain poorly understood. We report on new metastable boron phases formed during the transition in high-pressure high-temperature conditions that were discovered using the crystal structure search method. The metastable phases are understood to be a three-dimensional buckled defective honeycomb lattice in which boron vacancies lead to a dynamically and mechanically stable structure with triangular motifs. We suggest that the metastable phases act as intermediate states on the transition pathway from alpha-B-12 to gamma-B-28 owing to their structural flexibility and low enthalpies, in the framework of Ostwald's step rule.
provenance
Made available in Cube on 2018-09-28T16:01:59Z (GMT). No. of bitstreams: 0
language
English
author
Han, Woo Hyun
Oh, Young Jun
Choe, Duk-Hyun
Kim, Sunghyun
Lee, In-Ho
Chang, Kee Joo
orcid
Kim, Sunghyun/0000-0001-5072-6801
accessioned
2018-09-28T16:01:59Z
available
2018-09-28T16:01:59Z
issued
2017
citation
NPG ASIA MATERIALS(9)
issn
1884-4049
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486228.do
Funder
과학기술정보통신부
Funding Program
한국표준과학연구원연구운영비지원
Project ID
1711062921
Jurisdiction
Rep.of Korea
Project Name
Establishing Measurement Standards for Organic Analysis
rights
openAccess
type
article


Files in This Item

There are no attached files.