Role of 3d electrons in the rapid suppression of superconductivity in the dilute V doped spinel superconductor LiTi2O4

被引：18

作者：

Chen, C. L. ^{[1
]}

Dong, C. L. ^{[2
]}

Asokan, K. ^{[3
]}

Chen, J. L. ^{[4
]}

Liu, Y. S. ^{[4
]}

Guo, J-H ^{[5
]}

Yang, W. L. ^{[5
]}

Chen, Y. Y. ^{[1
]}

Hsu, F. C. ^{[1
]}

Chang, C. L. ^{[4
]}

Wu, M. K. ^{[1
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[3] Interuniv Accelerator Ctr, New Delhi 110067, India

[4] Tamkang Univ, Dept Phys, Tamsui, Taipei County, Taiwan

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2011年 / 24卷 / 11期

关键词：

X-RAY-ABSORPTION; TRANSITION-METAL COMPOUNDS; POLARIZATION DEPENDENCE; TITANIUM-OXIDES; K-EDGE; SPECTRA; TIO2; SPECTROSCOPY; ANATASE; SCATTERING;

D O I：

10.1088/0953-2048/24/11/115007

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microscopic effects of V doping in LiTi2O4 have been poorly understood. The present study employs x-ray absorption near-edge structure (XANES) and resonant inelastic soft-x-ray scattering (RIXS) spectroscopy to understand the change in the electronic structure due to dilute V doping in spinel LiTi2O4 and the possible origin for the rapid suppression of superconductivity in these compounds. Results from the XANES spectra at Ti L and K edges and Ti L-RIXS show that Ti exists in a mixed-valence state and, with V doping, the unoccupied states of Ti in the t(2g) band increase. The rapid suppression of superconductivity is associated with the change in Ti 3d electrons and Ti-O hybridization.

引用

页数：7

共 40 条

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