Anomalous magnetoresistance in the spinel superconductor LiTi2O4.

Characterization of the Electronic Structure of Spinel Superconductor LiTi2O4 using Synchrotron X-ray Spectroscopy

Exotic properties of spinel oxide superconductor Li1þxTi2O4

The polycrystalline Li1þxTi2O4 has intricate physical behaviors in normal and superconducting state. High-resolution X-ray diffraction shows that it is the pure spinel phase and there is no structural phase transition down to 20 K. In addition to the field-induced broadening of RðT Þ near the superconducting regime, an anomalous upturn in RðT Þ appears near the transition temperature when magne...

Scanning tunnelling spectroscopy of superconductivity on surfaces of LiTi2O4(111) thin films

Unique superconductivity at surfaces/interfaces, as exemplified by LaAlO3/SrTiO3 interfaces, and the high transition temperature in ultrathin FeSe films, have triggered intense debates on how superconductivity is affected in atomic and electronic reconstructions. The surface of superconducting cubic spinel oxide LiTi2O4 is another interesting system because its inherent surface electronic and a...

Anomalous low-temperature and high-field magnetoresistance in the organic superconductor b9-„BEDT-TTF...2SF5CH2CF2SO3

We report direct observations of anomalous magnetic-field and temperature dependences of the Shubnikov–de Haas oscillations in the organic superconductor b9-(BEDT-TTF)2SF5CH2CF2SO3. Unlike other BEDT-TTF based organic superconductors, a nonmetallic temperature dependence of the background magnetoresistance is clearly observed. It is speculated that the nonmetallic behavior may arise from a part...

Reversible superconductor-insulator transition in LiTi2O4 induced by Li-ion electrochemical reaction

Transition metal oxides display various electronic and magnetic phases such as high-temperature superconductivity. Controlling such exotic properties by applying an external field is one of the biggest continuous challenges in condensed matter physics. Here, we demonstrate clear superconductor-insulator transition of LiTi2O4 films induced by Li-ion electrochemical reaction. A compact electroche...