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Journal Article
Comments on Identity of Gap Anisotropy and Nodal Constant Fermi Velocity in Bi2Sr2CaCu2O8+δ
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- Authors
- Hyun-Tak Kim, Bong-Jun Kim, Kwang-Yong Kang
- Issue Date
- 2007-09
- Citation
- Physica C : Superconductivity, v.460-462, pp.943-945
- ISSN
- 0921-4534
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- On the basis of both the inhomogeneity of a superconductor Bi2Sr2CaCu2O8+灌 and the effect of measurement, we reveal that an anomalously large gap anisotropy known as evidence of dx2 - y2-wave symmetry [Z.X. Shen, D.S. Dessau, B.O. Wells, D.M. King, W.E. Spicer, A.J. Arko, D. Marshall, L.W. Lombardo, A. Kapitulnik, P. Dickinson, S. Doniach, J. DiCarlo, A.G. Loeser, C.H. Park, Phys. Rev. Lett. 70 (1993) 1553] is not intrinsic, and that the constant Fermi velocity at the node as an unsolved problem [X.J. Zhou, T. Yoshida, A. Lanzara, P.V. Bogdanov, S.A. Kellar, K.M. Shen, W.L. Yang, F. Ronning, T. Sasagawa, T. Kakeshita, T. Noda, H. Eisaki, S. Uchida, C.T. Lin, F. Zhou, J.W. Xiong, W.X. Ti, Z.X. Zhao, A. Fujimori, Z. Hussain, Z.-X. Shen, Nature 423 (2003) 398] is due to the dx2 - y2-wave insulator-metal transition. © 2007 Elsevier B.V. All rights reserved.