2003 Fiscal Year Final Research Report Summary
Study of the vortex states in high Tc superconductivity by scaming tunneling ^spoctroscopy
| Project/Area Number |
14540345
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
固体物性Ⅱ(磁性・金属・低温)
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
SAKATA Hideaki Tokyo University of Science, Faculty of Science, Associate Professor, 理学部, 助教授 (30215636)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Scaming tunneling ^spoctroscopy / High Tc superconductivity / La_<2-x>Sr_xCuO_4 / Bi_2Sr_2CaCu_2Ox |
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| Research Abstract |
We have performed scanning tunneling spectroscopic measurements on Bi_2Sr_2CaCu_2Ox and La_<2-x>Sr_xCuO_4 in order to investigate the vortex core states.In Bi_2Sr_2CaCu_2Ox, the short-range ordered vortices have been observed in the disordered configuration in 8T at 4.2K.The bound states in the vortex core are found to be electron-hole asymmetric.The vortices in La_<2-x>Sr_xCuO_4 have not been obtained in this study because of the surface instability.We have found, however, that the energy gap in La_<2-x>Sr_xCuO_4 is distributed in much smaller range than that observed in Bi_2Sr_2CaCu_2Ox.
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