Possibility of combining these new phenomenon with theversatile functionality of the highly tunable metal oxide devices.TMO interface is where new phenomenon merge.Effective tool toinvestigate electronic structureįractional quantum Hall effect in ZnO/(MgZn)O heterostructuresĮxperiments Science 315, 1388–1391 (2007).related to the Quantum-Hall effect and share the same 1/B-periodicity.The SdH oscillations are oscillations of the resistivity parallel to the current flow in the edge states of a 2DEG in an applied magnetic field.Two-dimensional superconducting characteristics a, Measurement of superconducting upper critical field, Hc2, using resistance versus magnetic field, H, for various angles between the sample plane and the magnetic field at T=50 mK.Rn, normal-state resistance.c, Sheet resistance, rxx, versus temperature, showing a clear superconducting transition at 370 mK.b, Low-field sheet carrier density, Ns (red), and electron Hall mobility, m (blue), versus temperature.Sample structure and transport characterization Shubnikov–deHaasoscillations in normal state.Free from large electronic disorder, high quality.Dopant-layer thickness below the other character length.With the local structure differing from bulk.With the mismatch of lattice parameter.Interface superconductivity LaAlO3/SrTiO3heterostructure Hubbard model Interaction Hamilton Approximation of short-range Coulomb interaction The simplest many-particle modelĬharge transfer CaMnO_3 CaRuO_3 heterointerface Antiferromagnetic insulator Paramagnetic metal ferromagneticĮlectrostatic boundary conditions Polar catastrophe Superconductivity or super fluidity Break.Symmetry change leads to phase transition. ![]() Perovskite structure of TMOs A: rare earth or alkaline earth elements M: transition metal O: oxide Charge, orbital and spin reconstructions Įlectronic structure of TM The d electrons play the domain role in TMOs properties.Transition metal oxides and its interface.Emergent phenomena at oxide interfaces Chen Ke, Liu Donghao, Lv Peng, Shen Bingran, Yan Qirui, Yang Wuhao, Ye Qijun, Zhu Chenji Nov.
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