title: Large area stress distribution in crystalline materials calculated from lattice deformation identified by electron backscatter diffraction.
abstract: We report a method to obtain the stress of crystalline materials directly from lattice deformation by Hooke's law. The lattice deformation was calculated using the crystallographic orientations obtained from electron backscatter diffraction (EBSD) technology. The stress distribution over a large area was obtained efficiently and accurately using this method. Wurtzite structure gallium nitride (GaN) crystal was used as the example of a hexagonal crystal system. With this method, the stress distribution of a GaN crystal was obtained. Raman spectroscopy was used to verify the stress distribution. The cause of the stress distribution found in the GaN crystal was discussed from theoretical analysis and EBSD data. Other properties related to lattice deformation, such as piezoelectricity, can also be analyzed by this novel approach based on EBSD data.
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Shao
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Hao
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Yongzhong
authors.initials: Y
authors.lastname: Wu
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Yuanbin
authors.initials: Y
authors.lastname: Dai
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tian
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan250100, P. R. China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Huo
references.citation: Nat Mater. 2003 Jun;2(6):379-81
references.pmid: 12754499
references.citation: Phys Rev B Condens Matter. 1996 Dec 15;54(24):17745-17753
references.pmid: 9985904