journal article·2014-10-22

Nonvolatile Resistance Switching on Two-Dimensional Electron Gas

Jin Gwan Joung, Shin-Ik Kim, Seon Young Moon, Dai-Hong Kim, Hyo Jin Gwon, Seong-Hyeon Hong, Hye Jung Chang, Jin-Ha Hwang, Beom Jin Kwon, Seong Keun Kim, Ji-Won Choi, Seok-Jin Yoon, Chong-Yun Kang, Kwang Soo Yoo, Jin-Sang Kim, Seung-Hyub Baek

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Abstract

Two-dimensional electron gas (2DEG) at the complex oxide interfaces have brought about considerable interest for the application of the next-generation multifunctional oxide electronics due to the exotic properties that do not exist in the bulk. In this study, we report the integration of 2DEG into the nonvolatile resistance switching cell as a bottom electrode, where the metal-insulator transition of 2DEG by an external field serves to significantly reduce the OFF-state leakage current while enhancing the on/off ratio. Using the Pt/Ta2O5-y/Ta2O5-x/SrTiO3 heterostructure as a model system, we demonstrate the nonvolatile resistance switching memory cell with a large on/off ratio (>10(6)) and a low leakage current at the OFF state (∼10(-13) A). Beyond exploring nonvolatile memory, our work also provides an excellent framework for exploring the fundamental understanding of novel physics in which electronic and ionic processes are coupled in the complex heterostructures.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Semiconductor materials and devices · Ferroelectric and Negative Capacitance Devices

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

Affiliations

Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea

Department of Nanomaterials Science and Technology, Korea University of Science and Technology, Daejeon 305-333, Republic of Korea

Department of Materials Science and Engineering, Research Institute of Advanced Materials Seoul National University, Seoul 151-744, Republic of Korea

Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea

Department of Materials Science and Engineering, Hongik University, Seoul 121-791, Republic of Korea

KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Republic of Korea

Department of Materials Science and Engineering, University of Seoul, Seoul 130-743, Republic of Korea

Funding

Ulsan National Institute of Science and Technology · Korea Institute of Science and Technology

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