Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: STM/STS study on large pseudogap and nodal superconducting gap in
  Bi2201(La) and Bi2212   In the present work, scanning tunneling microscopy/spectroscopy (STM/STS)
measurements were carried out on underdoped $\rm Bi_2Sr_{2-{\it x}}La_{\it
x}CuO_{6+\delta}$ and $\rm Bi_2Sr_2CaCu_2O_{8+\delta}$ to clarify the origin of
the pseudogap, in particular, the inhomogeneous large pseudogap. The nodal part
of a d-wave pairing gap, which is under no influence of the inhomogeneous large
pseudogap, was also examined by relating the homogeneous bottom part of the STS
gap to a nodal d-wave gap in momentum space. We report that the inhomogeneous
large pseudogap in the antinodal region links to a two-dimensional electronic
charge order, and that the gap size of the nodal d-wave part $\rm
{\Delta}_{sc}$ scales with the superconducting critical temperature $\rm {\it
T}_c$ in the pseudogap regime.

28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph