Kim, Shin-Ik Gwon, Hyo Jin Kim, Dai-Hong Kim, Seong Keun Choi, Ji-Won Yoon, Seok-Jin Chang, Hye Jung Kang, Chong-Yun Kwon, Beomjin Bark, Chung-Wung Hong, Seong-Hyeon Kim, Jin-Sang Baek, Seung-Hyub 2024-01-20T07:02:28Z 2024-01-20T07:02:28Z 2021-09-04 2015-05-27 2045-2322 https://pubs.kist.re.kr/handle/201004/125425 Manipulation of electrons in a solid through transmitting, storing, and switching is the fundamental basis for the microelectronic devices. Recently, the electroresistance effect in the ferroelectric capacitors has provided a novel way to modulate the electron transport by polarization reversal. Here, we demonstrate a giant electroresistive ferroelectric diode integrating a ferroelectric capacitor into two-dimensional electron gas (2DEG) at oxide interface. As a model system, we fabricate an epitaxial Au/Pb(Zr0.2Ti0.8)O-3/LaAlO3/SrTiO3 heterostructure, where 2DEG is formed at LaAlO3/SrTiO3 interface. This device functions as a two-terminal, non-volatile memory of 1 diode-1 resistor with a large I+/I- ratio (>10(8) at +/- 6 V) and I-on/I-off ratio (>10(7)). This is attributed to not only Schottky barrier modulation at metal/ferroelectric interface by polarization reversal but also the field-effect metal-insulator transition of 2DEG. Moreover, using this heterostructure, we can demonstrate a memristive behavior for an artificial synapse memory, where the resistance can be continuously tuned by partial polarization switching, and the electrons are only unidirectionally transmitted. Beyond non-volatile memory and logic devices, our results will provide new opportunities to emerging electronic devices such as multifunctional nanoelectronics and neuromorphic electronics. English NATURE PUBLISHING GROUP POLARIZATION CONDUCTION Giant Electroresistive Ferroelectric Diode on 2DEG Article 10.1038/srep10548 1 SCIENTIFIC REPORTS, v.5 SCIENTIFIC REPORTS 5 scie scopus 000355539600001 2-s2.0-84930225590 Multidisciplinary Sciences Science & Technology - Other Topics Article POLARIZATION CONDUCTION Electroresistive 2DEG Ferroelectric Diode