SUPERCONDUCTING ENERGY-GAP IN BI2SR2CACU2O8 OBSERVED BY HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY

被引：13

作者：

YOKOYA, T ^{[1
]}

TAKAHASHI, T ^{[1
]}

FUJIWARA, A ^{[1
]}

KOIKE, Y ^{[1
]}

机构：

[1] TOHOKU UNIV,DEPT APPL PHYS,SENDAI,MIYAGI 980,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1993年 / 87卷 / 06期

关键词：

D O I：

10.1016/0038-1098(93)90595-E

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral. weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (DELTA) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.

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页码：553 / 556

页数：4

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