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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/18429

Title: Anomalous magnetoresistance in the spinel superconductor LiTi2O4
Authors: Jin, K.
He, G.
Zhang, X.
Maruyama, S.
Yasui, S.
Suchoski, R.
Shin, J.
Jiang, Y.
Yu, H.S.
Yuan, J.
Shan, L.
Kusmartsev, F.V.
Greene, R.L.
Takeuchi, I.
Keywords: Physical sciences
Condensed matter
Issue Date: 2015
Publisher: © Macmillan Publishers Limited.
Citation: JIN, K. ...et al., 2015. Anomalous magnetoresistance in the spinel superconductor LiTi2O4. Nature Communications, 6. article no. 7183.
Abstract: LiTi2O4 is a unique compound in that it is the only known spinel oxide superconductor. The lack of high quality single crystals has thus far prevented systematic investigations of its transport properties. Here we report a careful study of transport and tunnelling spectroscopy in epitaxial LiTi2O4 thin films. An unusual magnetoresistance is observed which changes from nearly isotropic negative to prominently anisotropic positive as the temperature is decreased. We present evidence that shows that the negative magnetoresistance likely stems from the suppression of local spin fluctuations or spin-orbit scattering centres. The positive magnetoresistance suggests the presence of an orbital-related state, also supported by the fact that the superconducting energy gap decreases as a quadratic function of magnetic field. These observations indicate that the spin-orbital fluctuations play an important role in LiTi2O4 in a manner similar to high-temperature superconductors.
Description: This is the accepted manuscript version of the paper. The definitive published version can be found at: http://dx.doi.org/10.1038/ncomms8183
Sponsor: This research was supported by the National Science Foundation (DMR-1104256 and 1410665), AFOSR-MURI (FA9550-09-1-0603), AFOSR (FA95501410332), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB07020100) and the National Natural Science Foundation of China Grant (11474338, 11322432).
DOI: 10.1038/ncomms8183
URI: https://dspace.lboro.ac.uk/2134/18429
Publisher Link: http://dx.doi.org/10.1038/ncomms8183
ISSN: 2041-1723
Appears in Collections:Published Articles (Physics)

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