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Title: Clathrates and beyond: Low-density allotropy in crystalline silicon

In its common, thermodynamically stable state, silicon adopts the same crystal structure as diamond. Although only a few alternative allotropic structures have been discovered and studied over the past six decades, advanced methods for structure prediction have recently suggested a remarkably rich low-density phase space that has only begun to be explored. The electronic properties of these low-density allotropes of silicon, predicted by first-principles calculations, indicate that these materials could offer a pathway to improving performance and reducing cost in a variety of electronic and energy-related applications. Here in this focus review, we provide an introduction and overview of recent theoretical and experimental results related to low-density allotropes of silicon, highlighting the significant potential these materials may have for technological applications, provided substantial challenges to their experimental preparation can be overcome.
Authors:
 [1] ;  [2] ;  [2]
  1. California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States). Dept. of Physics
  2. Univ. of South Florida, Tampa, FL (United States). Dept. of Physics
Publication Date:
Grant/Contract Number:
FG02-04ER46145
Type:
Accepted Manuscript
Journal Name:
Applied Physics Reviews
Additional Journal Information:
Journal Volume: 3; Journal Issue: 4; Journal ID: ISSN 1931-9401
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1465354
Alternate Identifier(s):
OSTI ID: 1257501