Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two energy gaps observed in tunneling measurements on hole-doped
  cuprates: pairing gap and coherent gap   There is a clear discrepancy among the energy-gap values for different 90 K
cuprates, inferred from tunneling measurements. By using the phase diagram for
hole-doped cuprates we show that tunneling measurements performed on 90 K
cuprates, simply, detect two different energy gaps: the pairing gap and the
coherent gap, which are identical in conventional superconductors. We find that
there are two reasons why tunneling measurements show in one cuprate
exclusively the coherent gap while, in another cuprate, they show the pairing
gap: (i) the number of CuO2 planes per unit cell in the cuprate, and (ii) the
directionality of the tunneling current (along c-axis or ab-plane).

23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph