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Does photoinduced structural change by β-rhombohedral boron occur at room temperature?

Journal Article · · Solid State Sciences
 [1];  [2];  [2];  [2];  [1];  [3];  [4]
  1. National Institute for Materials Science (NIMS), Tsukuba (Japan)
  2. Tokyo Univ. of Science (Japan)
  3. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  4. National Institute for Materials Science (NIMS), Tsukuba (Japan; Univ. of Tokyo, Chiba (Japan)

β-rhombohedral boron (β-B) is an intriguing solid among the elements. The crystal structure of β-B is widely accepted as a complex structure based on the B12 clusters, and with a lot of intrinsic structural defects. In the last decade, β-B was proved to be the only elemental semiconductor that exhibits the self-compensation property accompanied by changing structural defects during atom doping. Moreover, it is reported that various physical properties of β-B change discontinuously around 550 K, which may originate from defect diffusion [S. Hoffmann and H. Werheit, Solid State Sciences 14, 1572 (2012)]. We previously reported that a volume expansion of about 1.5% takes place above this temperature (between 650 K and 850 K). On the other hand, this expanded structure is stable in dark conditions for more than 4.5 months. Finally, light irradiation at room temperature reverses the volume back to the initial state, and a possible scenario will be discussed in this paper.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Japan Society for the Promotion of Science (JSPS) (KAKENHI)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
2212866
Alternate ID(s):
OSTI ID: 1987917
Report Number(s):
LLNL--JRNL-856734; 1086144
Journal Information:
Solid State Sciences, Journal Name: Solid State Sciences Vol. 142; ISSN 1293-2558
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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