DataVXACS Applied Electronic MaterialsPaper
journal article·2022-07-26

Modulation of the Metal–Nonmetal Crossover in SrIrO3/CaMnO3 Superlattices

Minghui Gu, Ruixue Zhu, Xinxin Zhang, Zhenzhen Wang, Qichang An, Fang Yang, Xiaoran Liu, Peng Gao, Meng Meng, Jiandong Guo

ACS Applied Electronic Materials· Volume 4· Issue 7
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Source abstract

Abstract

Due to a combination of the interplay between electron–electron correlation (EEC) and spin–orbit coupling, 3d–5d transition-metal oxide interfaces have been an intriguing platform for the exploration of emergent quantum phenomena. In this work, we investigate the 3d–5d electron coupling by designing SrIrO3/CaMnO3 superlattices and studying their electrical transport behaviors. The [(SrIrO3)n/(CaMnO3)n]m superlattices show a metal–nonmetal crossover (MNC) with the critical temperature increasing monotonically with decreasing n, until n = 1, a nonmetallic behavior is observed up to room temperature. Detailed analyses reveal that the MNC is the consequence of the weak localization modified by the enhanced EEC in SrIrO3 competing with the effective field of spin–orbital relaxation, with the interfaces with CaMnO3 being introduced to the superlattices. This study provides a framework for understanding the microscopic picture of 3d–5d electron coupling.
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Research context

OpenAlex topics: Advanced Condensed Matter Physics · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China

International Center for Quantum Materials, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, People’s Republic of China

Songshan Lake Materials Laboratory, Dongguan, Guangdong 523000, People’s Republic of China

Funding

Institute of Physics · Guangdong Science and Technology Department · Ministry of Science and Technology of the People's Republic of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Natural Science Foundation of China · Chinese Academy of Sciences · Beijing Advanced Innovation Center for Materials Genome Engineering · Collaborative Innovation Center of Quantum Matter

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