Electrical resistivity and Andreev reflection spectroscopy of the superconducting oxide spinel LiTi2O4

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	Electrical resistivity and Andreev reflection spectroscopy of the superconducting oxide spinel LiTi2O4
	Tang, L ; Zou, PY ; Shan, L ; Dong, AF ; Che, GC ; Wen, HH
刊名	PHYSICAL REVIEW B
	2006
卷号	73 期号:18
关键词	NORMAL STATE PROPERTIES TRANSITION LI1+XTI2-XO4 TRANSPORT INSULATOR FIELD
ISSN号	1098-0121
通讯作者	Tang, L: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China.
中文摘要	We measured resistivity and Andreev reflection spectroscopy on LiTi2O4 polycrystalline samples (T-c approximate to 12.3 K) synthesized by a new method. Resistivity shows the metallic temperature dependence and is well fitted by the Bloch-Gruneisen theory above 90 K. This is consistent with the picture of electron-phonon scattering. Below 90 K and above T-c it shows T-2 temperature dependence suggesting Fermi liquid behavior above T-c. From the H-c2-T phase diagram the upper critical field H-c2(0) is estimated to be about 11.6 T based on the Ginzburg-Landau theory. Point-contact Andreev reflection spectroscopy gives 2 Delta(0)/k(B)T(C)approximate to 4 and reveals that LiTi2O4 is a typical intermediate-coupling s-wave BCS superconductor. We also observed the resistive hump in a normal state and the field-induced upturn near the transition region of the rho(T) curve on the aged samples. In comparison with the fresh one, it suggests that the above exotic rho(T) behavior is not an intrinsic character of the pure stoichiometric LiTi2O4 compound.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/36954]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Tang, L,Zou, PY,Shan, L,et al. Electrical resistivity and Andreev reflection spectroscopy of the superconducting oxide spinel LiTi2O4[J]. PHYSICAL REVIEW B,2006,73(18).
APA	Tang, L,Zou, PY,Shan, L,Dong, AF,Che, GC,&Wen, HH.(2006).Electrical resistivity and Andreev reflection spectroscopy of the superconducting oxide spinel LiTi2O4.PHYSICAL REVIEW B,73(18).
MLA	Tang, L,et al."Electrical resistivity and Andreev reflection spectroscopy of the superconducting oxide spinel LiTi2O4".PHYSICAL REVIEW B 73.18(2006).