Photoemission revealing signature of stripes and orbital modulation in the high T[sub c] superconductors

Saini, N. L.; Bianconi, A.
May 2000
AIP Conference Proceedings;2000, Vol. 514 Issue 1, p74
Academic Journal
Here we report use of angle resolved photoemission (ARPES) in the angle scanning mode to explore the Fermi surface topology of the high T[sub c] superconductors. We have measured momentum distribution of the spectral weight at the Fermi level of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8±δ] (Bi2212) superconductor. The measurements were made in two different experimental geometry to take care of the polarization dependence of the transition probability (matrix element effects). We find an asymmetric suppression of spectral weight around (π, 0) that is a direct indication of coupling of the itinerant carriers with an incommensurate charge density wave (ICDW) or with an ‘orbital wave,’ i.e., stripes, with a wave vector q(0.4π,0.4π). © 2000 American Institute of Physics.


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