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Two‐Dimensional Electron Gases at the Amorphous and Crystalline SrTiO3/KTaO3 Heterointerfaces by Hao Xu; Yulin Gan; Yuchen Zhao; Minghang Li; Xinzhe Hu; Xuanzhuang Chen; Ruwu Wang; Ying Li; Jirong Sun; Fengxia Hu; Yunzhong Chen; Baogen Shen is a Materials Science article available to read on EtoBox.

What is Two‐Dimensional Electron Gases at the Amorphous and Crystalline SrTiO3/KTaO3 Heterointerfaces about?

The 5d two-dimensional electron gas (2DEG) based on KTaO3 (KTO) exhibits a lot of exotic properties such as stronger spin-orbit coupling (SOC) and higher superconductivity transition temperature than those of SrTiO3 (STO)-based 3d 2DEGs, whereas it has much lower electron mobility. Herein, we investigate the property of the 5d 2DEGs including the carrier mobility and Rashba SOC by interfacing both amorphous and crystalline STO with the crystalline KTO. Metallic 2DEGs are achieved at both interfaces of amorphous and crystalline STO capped KTO. Notably, the amorphous STO/KTO heterointerface has larger carrier concentration and higher Hall mobility than the crystalline STO/KTO counterparts at low temperatures, which stems from two kinds of carries.In contrast, the 5d 2DEG formed at crystalline interface exhibits much stronger Rashba SOC as revealed through magneto-transport measurement. The deduced maximum strength of Rashba SOC and spin-splitting energy are ~ 8.56 × 10 -12 eV m and ~ 33.52 meV, respectively. Our results provide new insights on designing on-demand properties of KTO-based conducting interfaces.

Who reads Two‐Dimensional Electron Gases at the Amorphous and Crystalline SrTiO3/KTaO3 Heterointerfaces?

Author

Hao Xu; Yulin Gan; Yuchen Zhao; Minghang Li; Xinzhe Hu; Xuanzhuang Chen; Ruwu Wang; Ying Li; Jirong Sun; Fengxia Hu; Yunzhong Chen; Baogen Shen

Publisher

Wiley

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)