Effect of Mn impurities on the superconductivity in NaxCoO2•yH2O

被引：12

作者：

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

Liu, C.-J.

Wang, J.-S.

Lin, J.-Y.

Sun, C. P.

Huang, S. W.

Lee, J. M.

Chen, J. M.

Lee, J. F.

Liu, D. G.

Yang, H. D.

机构：

[1] Natl Chiao Tung Univ, Inst Phys, Hsinchu 300, Taiwan

[2] Natl Changhua Unv Educ, Dept Phys, Changhua 50007, Taiwan

[3] Natl Sun Yat Sen Univ, Ctr Nanosci & Nanotechnol, Dept Phys, Kaohsiung 804, Taiwan

[4] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 300, Taiwan

[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.76.092501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To shed light on the symmetry of the superconducting order parameter in NaxCoO2 center dot yH(2)O, the Mn doping effects are studied. X-ray absorption spectroscopy verifies that the doped Mn impurities occupy the Co sites and are with a valance close to +4. Impurity scattering by Mn is in the unitary limit that, however, does not lead to strong T-c suppression. This absence of the strong impurity effects on T-c is inconsistent with the simple picture of a sign-changing order parameter. Coexistence of the s-wave superconducting order parameter and the nodal one is proposed to reconcile all the existing experiments and has been implied by the specific heat experiments.

引用

页数：4

共 38 条

[1] Abrikosov AA., 2017, FUNDAMENTALS THEORY
[2] Details of disorder matter in 2D d-wave superconductors
Atkinson, WA
Hirschfeld, PJ
MacDonald, AH
Ziegler, K
[J]. PHYSICAL REVIEW LETTERS, 2000, 85 (18) : 3926 - 3929
[3] Hydrothermal synthesis and characterization of K chi MnO2 center dot gamma H2O
Chen, RJ
Zavalij, P
Whittingham, MS
[J]. CHEMISTRY OF MATERIALS, 1996, 8 (06) : 1275 - 1280
[4] HYDROTHERMAL SYNTHESIS OF LITHIUM AND SODIUM MANGANESE OXIDES AND THEIR METAL-ION EXTRACTION INSERTION REACTIONS
FENG, Q
KANOH, H
MIYAI, Y
OOI, K
[J]. CHEMISTRY OF MATERIALS, 1995, 7 (06) : 1226 - 1232
[5] Charge ordering, commensurability, and metallicity in the phase diagram of the layered NaxCoO2 -: art. no. 247001
Foo, ML
Wang, YY
Watauchi, S
Zandbergen, HW
He, T
Cava, RJ
Ong, NP
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (24) : 247001 - 1
[6] HARAN G, 2000, PHYS REV B, V63
[7] Possible evidence for the existence of the Fehrenbacher-Rice band:: O K-edge XANES study on Pr1-xCaxBa2Cu3O7
Hong, IP
Lin, JY
Chen, JM
Chatterjee, S
Liu, SJ
Gou, YS
Yang, HD
[J]. EUROPHYSICS LETTERS, 2002, 58 (01): : 126 - 132
[8] Unconventional superconductivity induced by quantum critical fluctuations in hydrate cobaltate Nax(H3O)zCoO2-yH2O -: Relationship between magnetic fluctuations and superconductivity revealed by Co nuclear quadrupole resonance
Ihara, Y.
Takeya, H.
Ishida, K.
Ikeda, H.
Michioka, C.
Yoshimura, K.
Takada, K.
Sasaki, T.
Sakurai, H.
Takayama-Muromachi, E.
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2006, 75 (12)
[9] 17O NMR measurements on superconducting Na0.35CoO2•yH2O
Ihara, Y
Ishida, K
Yoshimura, K
Takada, K
Sasaki, T
Sakura, H
Takayama-Muromachi, E
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2005, 74 (08) : 2177 - 2180
[10] Possibility of f-wave spin-triplet superconductivity in the CoO2 superconductor:: A case study on a 2D triangular lattice in the repulsive Hubbard model
Ikeda, H
Nisikawa, Y
Yamada, K
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2004, 73 (01) : 17 - 20

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