Coexistence of competing orders with two energy gaps in real and momentum space in the High T$_{c}$ Superconductor Bi$_{2}$Sr$_{2-x}$La$_{x}$CuO$_{6+\delta }$
ORAL
Abstract
We have performed scanning tunneling microscopy and angle-resolved photoemission spectroscopy on optimally doped and overdoped Bi$_{2}$Sr$_{2-x}$La$_{x}$CuO$_{6+\delta }$. We observe two distinct energy gaps that coexist both in real space and in the antinodal region of momentum space below T$_{c. }$We find that the small gap is associated with superconductivity. The large gap persists above T$_{C}$ and seems to be linked to observed charge order. We also find a strong correlation between these two gaps suggesting they are affected by similar physical processes.
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