title: Mechanical writing of n-type conductive layers on the SrTiO3 surface in nanoscale.
abstract: The fabrication and control of the conductive surface and interface on insulating SrTiO3 bulk provide a pathway for oxide electronics. The controllable manipulation of local doping concentration in semiconductors is an important step for nano-electronics. Here we show that conductive patterns can be written on bare SrTiO3 surface by controllable doping in nanoscale using the mechanical interactions of atomic force microscopy tip without applying external electric field. The conductivity of the layer is n-type, oxygen sensitive, and can be effectively tuned by the gate voltage. Hence, our findings have potential applications in oxide nano-circuits and oxygen sensors.
authors.affiliation: 1] State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China [2] National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, 621999, Mianyang, Sichuan, China.
authors.forename: Yuhang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China.
authors.forename: Kehan
authors.initials: K
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China.
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Shi
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China.
authors.forename: Geng
authors.initials: G
authors.lastname: Li
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China.
authors.forename: Guanlin
authors.initials: G
authors.lastname: Xie
authors.affiliation: Department of Physics, Beijing University of Aeronautics and Astronautics, 100191, Beijing, China.
authors.forename: Xubo
authors.initials: X
authors.lastname: Lai
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Ni
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, 100084, Beijing, China.
authors.forename: Liuwan
authors.initials: L
authors.lastname: Zhang