在铜酸盐超导体的赝能隙相中，面内磁电阻遵循科勒规则。
In-plane magnetoresistance obeys Kohler's rule in the pseudogap phase of cuprate superconductors.
作者信息
Chan M K, Veit M J, Dorow C J, Ge Y, Li Y, Tabis W, Tang Y, Zhao X, Barišić N, Greven M
机构信息
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA and AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
出版信息
Phys Rev Lett. 2014 Oct 24;113(17):177005. doi: 10.1103/PhysRevLett.113.177005. Epub 2014 Oct 21.
We report in-plane resistivity (ρ) and transverse magnetoresistance (MR) measurements for underdoped HgBa(2)CuO(4+δ) (Hg1201). Contrary to the long-standing view that Kohler's rule is strongly violated in underdoped cuprates, we find that it is in fact satisfied in the pseudogap phase of Hg1201. The transverse MR shows a quadratic field dependence, δρ/ρ(0)=aH(2), with a(T)∝T(-4). In combination with the observed ρ∝T(2) dependence, this is consistent with a single Fermi-liquid quasiparticle scattering rate. We show that this behavior is typically masked in cuprates with lower structural symmetry or strong disorder effects.
我们报告了欠掺杂的HgBa₂CuO₄₊δ（Hg1201）的面内电阻率（ρ）和横向磁电阻（MR）测量结果。与长期以来认为欠掺杂铜酸盐中强烈违反科勒规则的观点相反，我们发现实际上在Hg1201的赝能隙相中它是满足的。横向MR表现出二次场依赖性，δρ/ρ₀ = aH²，其中a(T) ∝ T⁻⁴。结合观察到的ρ ∝ T²依赖性，这与单一费米液体准粒子散射率一致。我们表明，这种行为在结构对称性较低或无序效应较强的铜酸盐中通常会被掩盖。
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