Significant gap anisotropy within the a-b plane of Bi2Sr2CaCu2O8 has been observed with a low temperature scanning tunneling microscope. The energy gap is largest along the a-axis direction, with Δp-p=36.6 meV and decreases gradually to a value of 23 meV along the direction 45°from the a axis. The tunneling data have been fit well using a simple model which assumes a d-wave-pairing energy gap, and allows tunneling in all directions close to the normal of the surface.
|Number of pages||4|
|Journal||Physical Review Letters|
|State||Published - 1994|
ASJC Scopus subject areas
- Physics and Astronomy (all)