OBSERVATION OF A-B PLANE GAP ANISOTROPY IN BI2SR2CACU2O8 WITH A LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPE

Authors
KANE J CHEN Q NG KW TAO HJ
Citation
J. Kane et al., OBSERVATION OF A-B PLANE GAP ANISOTROPY IN BI2SR2CACU2O8 WITH A LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPE, Physical review letters, 72(1), 1994, pp. 128-131
Citations number
26
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
1
Year of publication
1994
Pages
128 - 131
Database
ISI
SICI code
0031-9007(1994)72:1<128:OOAPGA>2.0.ZU;2-6
Abstract
Significant gap anisotropy within the a-b plane of Bi2Sr2CaCu2O8 has b een observed with a low temperature scanning tunneling microscope. The energy gap is largest along the a-axis direction, with DELTA(p-p) = 3 6.6 meV and decreases gradually to a value of 23 meV along the directi on 45-degrees from the a axis. The tunneling data have been fit well u sing a simple model which assumes a d-wave-pairing energy gap, and all ows tunneling in all directions close to the normal of the surface.