TY - JOUR
T1 - Superconducting gap anisotropy and quasiparticle interactions
T2 - A doping dependent photoemission study
AU - Mesot, J.
AU - Norman, M. R.
AU - Ding, H.
AU - Randeria, M.
AU - Campuzano, J. C.
AU - Paramekanti, A.
AU - Fretwell, H. M.
AU - Kaminski, A.
AU - Takeuchi, T.
AU - Yokoya, T.
AU - Sato, T.
AU - Takahashi, T.
AU - Mochiku, T.
AU - Kadowaki, K.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple coskx−cosky form, which suggests an increasing importance of long range interactions as the insulator is approached.
AB - Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple coskx−cosky form, which suggests an increasing importance of long range interactions as the insulator is approached.
UR - http://www.scopus.com/inward/record.url?scp=0342763849&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0342763849&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.83.840
DO - 10.1103/PhysRevLett.83.840
M3 - Article
AN - SCOPUS:0342763849
VL - 83
SP - 840
EP - 843
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 4
ER -