Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Logarithmic Upturn in Low-Temperature Electronic Transport as a
  Signature of d-Wave Order in Cuprate Superconductors   In cuprate superconductors, high magnetic fields have been used extensively
to suppress superconductivity and expose the underlying normal state. Early
measurements revealed insulating-like behavior in underdoped material versus
temperature $T$, in which resistivity increases on cooling with a puzzling
$\log(1/T)$ form. We instead use microwave measurements of flux-flow
resistivity in YBa$_2$Cu$_3$O$_{6+y}$ and Tl$_2$Ba$_2$CuO$_{6+\delta}$ to study
charge transport deep inside the superconducting phase, in the low temperature
and low field regime. Here, the transition from metallic low-temperature
resistivity ($d\rho/dT>0$) to a $\log(1/T)$ upturn persists throughout the
superconducting doping range, including a regime at high carrier dopings in
which the field-revealed normal-state resistivity is Fermi-liquid-like. The
$\log(1/T)$ form is thus likely a signature of $d$-wave superconducting order,
and the field-revealed normal state's $\log(1/T)$ resistivity may indicate the
free-flux-flow regime of a phase-disordered $d$-wave superconductor.

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The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
27
The categories of this paper are: comp-gas