Document Detail

Substitutional alloy of bi and te at high pressure.
MedLine Citation:
PMID:  21561201     Owner:  NLM     Status:  In-Data-Review    
Being a best known thermoelectric material and a topological insulator at ambient condition, magic bismuth telluride (Bi_{2}Te_{3}) under pressure transforms into several superconducting phases, whose structures remain unsolved for decades. Here, we have solved the two long-puzzling low high-pressure phases as seven- and eightfold monoclinic structures, respectively, through particle-swarm optimization technique on crystal structure prediction. Above 14.4 GPa, we experimentally discovered that Bi_{2}Te_{3} unexpectedly develops into a Bi-Te substitutional alloy by adopting a body-centered cubic disordered structure stable at least up to 52.1 GPa. The continuously monoclinic distortion leads to the ultimate formation of the Bi-Te alloy, which is attributed to the Bi→Te charge transfer under pressure. Our research provides a route to find alloys made of nonmetallic elements for a variety of applications.
Li Zhu; Hui Wang; Yanchao Wang; Jian Lv; Yanmei Ma; Qiliang Cui; Yanming Ma; Guangtian Zou
Publication Detail:
Type:  Journal Article     Date:  2011-04-08
Journal Detail:
Title:  Physical review letters     Volume:  106     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-05-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  145501     Citation Subset:  IM    
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
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