Architecture of nanoscale ferroelectric domains in GaMo.sub.4./sub.S.sub.8./sub.

0498118 - FZÚ 2019 RIV GB eng J - Článek v odborném periodiku
Neuber, E. - Milde, P. - Butykai, A. - Bordács, S. - Nakamura, H. - Waki, T. - Tabata, Y. - Geirhos, K. - Lunkenheimer, P. - Kersmarki, I. - Ondrejkovič, Petr - Hlinka, Jiří - Eng, L.M.
Architecture of nanoscale ferroelectric domains in GaMo₄S₈.
Journal of Physics-Condensed Matter. Roč. 30, č. 44 (2018), s. 1-7, č. článku 445402. ISSN 0953-8984. E-ISSN 1361-648X
Grant CEP: GA ČR GC17-11494J
Grant ostatní: AV ČR(CZ) DAAD-17-07
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: Kelvin probe force microscopy * piezoresponse force microscopy * lacunar spinel * ferroelectricity * multiferroicity * domain walls * topology
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.711, rok: 2018

Local-probe imaging of the ferroelectric domain structure and auxiliary bulk pyroelectric measurements were conducted at low temperatures with the aim to clarify the essential aspects of the orbitally driven phase transition in GaMo4S8, a lacunar spinel crystal that can be viewed as a spin-hole analogue of its GaV4S8 counterpart. We employed multiple scanning probe techniques combined with symmetry and mechanical compatibility analysis to uncover the hierarchical domain structures, developing on the 10-100 nm scale. The identified domain architecture involves a plethora of ferroelectric domain boundaries and junctions, including primary and secondary domain walls in both electrically neutral and charged configurations, and topological line defects transforming neutral secondary walls into two oppositely charged ones.
Trvalý link: http://hdl.handle.net/11104/0290533