title: ZnO Nanorods on a LaAlO3 -SrTiO3 Interface: Hybrid 1D-2D Diodes with Engineered Electronic Properties.
abstract: Integrating nanomaterials with different dimensionalities and properties is a versatile approach toward realizing new functionalities in advanced devices. Here, a novel diode-type heterostructure is reported consisting of 1D semiconducting ZnO nanorods and 2D metallic LaAlO3-SrTiO3 interface. Tunable insulator-to-metal transitions, absent in the individual components, are observed as a result of the competing temperature-dependent conduction mechanisms. Detailed transport analysis reveals direct tunneling at low bias, Fowler-Nordheim tunneling at high forward bias, and Zener breakdown at high reverse bias. Our results highlight the rich electronic properties of such artificial diodes with hybrid dimensionalities, and the design principle may be generalized to other nanomaterials.
authors.affiliation: Materials Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Ashok
authors.initials: A
authors.lastname: Bera
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical science, Nanyang Technological University, Singapore, 637371, Singapore.
authors.forename: Weinan
authors.initials: W
authors.lastname: Lin
authors.affiliation: Nanofab and Thin Film Core Lab, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Yingbang
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Materials Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Ding
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical science, Nanyang Technological University, Singapore, 637371, Singapore.
authors.forename: James
authors.initials: J
authors.lastname: Lourembam
authors.affiliation: Materials Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Tom
authors.initials: T
authors.lastname: Wu
keywords: ZnO, diodes; insulator-to-metal transition; nanorods; oxide interfaces; tunneling