Please use this identifier to cite or link to this item:
Title: The Mechanism of Electrolyte Gating on High-Tc Cuprates The Role of Oxygen Migration and Electrostatics
Authors: Lingchao Zhang 
Shengwei Zeng 
Xinmao Yin 
Teguh Citra Asmara 
Ping Yang 
Kun Han 
Yu Cao 
Wenxiong Zhou 
Dongyang Wan 
Chi Sin Tang 
Andrivo Rusydi 
Thirumalai Venkatesan 
Keywords: electrolyte gating
ionic liquid
oxygen migration
electrostatic field effect
Issue Date: 25-Sep-2017
Citation: Lingchao Zhang, Shengwei Zeng, Xinmao Yin, Teguh Citra Asmara, Ping Yang, Kun Han, Yu Cao, Wenxiong Zhou, Dongyang Wan, Chi Sin Tang, Andrivo Rusydi, Ariando, Thirumalai Venkatesan (2017-09-25). The Mechanism of Electrolyte Gating on High-Tc Cuprates The Role of Oxygen Migration and Electrostatics. ACS Nano 11 : 9950 - 9956. ScholarBank@NUS Repository.
Abstract: Electrolyte gating is widely used to induce large carrier density modulation on solid surfaces to explore various properties. Most of past works have attributed the charge modulation to electrostatic field effect. However, some recent reports have argued that the electrolyte gating effect in VO2, TiO2, and SrTiO3 originated from field-induced oxygen vacancy formation. This gives rise to a controversy about the gating mechanism, and it is therefore vital to reveal the relationship between the role of electrolyte gating and the intrinsic properties of materials. Here, we report entirely different mechanisms of electrolyte gating on two high-Tc cuprates, NdBa2Cu3O7−δ (NBCO) and Pr2–xCexCuO4 (PCCO), with different crystal structures. We show that field-induced oxygen vacancy formation in CuO chains of NBCO plays the dominant role, while it is mainly an electrostatic field effect in the case of PCCO. The possible reason is that NBCO has mobile oxygen in CuO chains, while PCCO does not. Our study helps clarify the controversy relating to the mechanism of electrolyte gating, leading to a better understanding of the role of oxygen electro migration which is very material specific.
Source Title: ACS Nano
ISSN: 1936086X
DOI: 10.1021/acsnano.7b03978
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.