Twinning in Czochralski-Grown 36°-RY LiTaO3 Single Crystals

Abstract

The origin of twinning during the Czochralski (CZ) growth of 36°-RY lithium tantalate (LiTaO3) single crystals is examined, and it is shown that lineages composed of dislocation arrays act as an initiation site for twinning. Two types of lineages expand roughly along three different [...]

Cycling-Induced Capacity Increase of Bulk and Artificially Layered LiTaO3 Anodes in Lithium-Ion Batteries

“…The lattice fringe measurement obtained from the SAED of the S-LTO sample shows d spacing = 0.45 nm, which is also witnessed in the XRD pattern of this sample. The 6-fold symmetry observed in the SAED of S-LTO cannot belong to the conventional crystalline LiTaO 3 since this phase is crystallized in a rhombohedral crystal system with the R 3 c space group . Having a trigonal symmetry, the rhombohedral phase of LiTaO 3 possesses a 3-fold symmetry rather than a 6-fold symmetry that is observed in the SAED .…”

“…The 6-fold symmetry observed in the SAED of S-LTO cannot belong to the conventional crystalline LiTaO 3 since this phase is crystallized in a rhombohedral crystal system with the R3c space group. 29 Having a trigonal symmetry, the rhombohedral phase of LiTaO 3 possesses a 3-fold symmetry rather than a 6fold symmetry that is observed in the SAED. 30 Therefore, the forbidden 6-fold symmetry witnessed in the SAED of the S-LTO sample can be ascribed to the introduction of a quasiperiodicity associated with a limited restacking of LiTaO 3 nanosheets that has led to the formation of a lowdimensional quasicrystalline LiTaO 3 .…”