Details

Autor(en) / Beteiligte

• He, Xinfeng
• Xu, Tao
• Xu, Xiaofeng
• Zeng, Yijie
• Xu, Jing
• Sun, Litao
• Wang, Chunrui
• Xing, Huaizhong
• Wu, Binhe
• Lu, Aijiang
• Liu, Dingquan
• Chen, Xiaoshuang
• Chu, Junhao

Titel

In Situ Atom Scale Visualization of Domain Wall Dynamics in VO2 Insulator-Metal Phase Transition

Ist Teil von

• Scientific reports, 2014-10, Vol.4 (1), p.6544-6544, Article 6544

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2014

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• A domain wall, as a device, can bring about a revolution in developing manipulation of semiconductor heterostructures devices at the atom scale. However, it is a challenge for these new devices to control domain wall motion through insulator-metal transition of correlated-electron materials. To fully understand and harness this motion, it requires visualization of domain wall dynamics in real space. Here, domain wall dynamics in VO 2 insulator-metal phase transition was observed directly by in situ TEM at atom scale. Experimental results depict atom scale evolution of domain morphologies and domain wall exact positions in (202) and (040) planes referring to rutile structure at 50°C. In addition, microscopic mechanism of domain wall dynamics and accurate lattice basis vector relationship of two domains were investigated with the assistance of X-ray diffraction, ab initio calculations and image simulations. This work offers a route to atom scale tunable heterostructure device application.