Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: T/B scaling of magnetization in the mixed valent compound \beta-YbAlB4   Here we provide the first clear evidence of Fermi-liquid breakdown in an
intermediate valence system. We employ high precision magnetization
measurements of the valence fluctuating superconductor beta-YbAlB4 to probe the
quantum critical free energy down to temperatures far below the characteristic
energy scale of the valence fluctuations. The observed T/B scaling in the
magnetization over three decades not only indicates unconventional quantum
criticality, but places an upper bound on the critical magnetic field |B_c| <
0.2 mT, a value comparable with the Earth's magnetic field and six orders of
magnitude smaller than the valence fluctuation scale. This tiny value of the
upper bound on B_c, well inside the superconducting dome, raises the
fascinating possibility that valence fluctuating beta-YbAlB4 is intrinsically
quantum critical, without tuning the magnetic field, pressure, or composition:
the first known example of such a phenomenon in a metal.

30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con