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Isotropic Negative Area Compressibility over Large Pressure Range in Potassium Beryllium Fluoroborate and its Potential Applications in Deep Ultraviolet Region
Author(s) -
Jiang Xingxing,
Luo Siyang,
Kang Lei,
Gong Pifu,
Yao Wenjiao,
Huang Hongwei,
Li Wei,
Huang Rongjin,
Wang Wei,
Li Yanchun,
Li Xiaodong,
Wu Xiang,
Lu Peixiang,
Li Laifeng,
Chen Chuangtian,
Lin Zheshuai
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201502212
Subject(s) - isotropy , beryllium , compressibility , anisotropy , materials science , diffraction , ultraviolet , debye model , figure of merit , engineering physics , optoelectronics , optics , condensed matter physics , physics , thermodynamics , nuclear physics
Isotropic negative area compressibility, which is very rare, is observed in KBBF and the related mechanism is investigated by combined high‐pressure X‐ray diffraction (XRD) experiments and first‐principles calculations. The strong mechanical anisotropy leads to a large Poisson's ratio and high figure of merit for the acoustic‐optics effect, giving KBBF potential applications as smart strain converters and deep‐ultraviolet (DUV) acoustic‐optic devices.