Quantum oscillations from the reconstructed Fermi surface in electron-doped cuprate superconductors

Quantum oscillations from the reconstructed Fermi surface in electron-doped cuprate superconductors
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电子掺杂铜酸盐超导体中重建费米表面的量子振荡

DOI:
10.1088/1367-2630/aab7e7
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发表时间:
2018
影响因子:
3.3
通讯作者:
Butch, N P
Butch, N P
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Higgins, J S;Chan, M K;Sarkar, Tarapada;McDonald, R D;Greene, R L;Butch, N P

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通过测量薄膜中的Shubnikov-de哈斯振荡,我们研究了电子掺杂铜氧化物超导体的电子结构。在最佳掺杂的Pr 2− x Ce x CuO 4±δ和La 2− x Ce x CuO 4±δ中,量子振荡表明存在小费米面,表明电子重构是电子掺杂铜氧化物的一般特征,尽管超导圆顶的位置在非常不同的掺杂水平。负的高场磁电阻与散射中的异常低温变化相关,该变化修改了量子振荡的振幅。这种行为与归因于自旋涨落的效应是一致的。
We have studied the electronic structure of electron-doped cuprate superconductors via measurements of high-field Shubnikov–de Haas oscillations in thin films. In optimally doped Pr 2− x Ce x CuO 4±δ and La 2− x Ce x CuO 4±δ, quantum oscillations indicate the presence of a small Fermi surface, demonstrating that electronic reconstruction is a general feature of the electron-doped cuprates, despite the location of the superconducting dome at very different doping levels. Negative high-field magnetoresistance is correlated with an anomalous low-temperature change in scattering that modifies the amplitude of quantum oscillations. This behavior is consistent with effects attributed to spin fluctuations.
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