Magnetic fluctuations in n-type high-T-c superconductors reveal breakdown of fermiology: Experiments and Fermi-liquid/RPA calculations

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	Magnetic fluctuations in n-type high-T-c superconductors reveal breakdown of fermiology: Experiments and Fermi-liquid/RPA calculations
	Kruger, F ; Wilson, SD ; Shan, L ; Li, SL ; Huang, Y ; Wen, HH ; Zhang, SC ; Dai, PC ; Zaanen, J
刊名	PHYSICAL REVIEW B
	2007
卷号	76 期号:9
ISSN号	1098-0121
中文摘要	By combining experimental measurements of the quasiparticle and dynamical magnetic properties of optimally electron-doped Pr0.88LaCe0.12CuO4 with theoretical calculations, we demonstrate that the conventional fermiology approach cannot possibly account for the magnetic fluctuations in these materials. In particular, we perform tunneling experiments on the very same sample for which a dynamical magnetic resonance has been reported recently and use photoemission data by others on a similar sample to characterize the fermionic quasiparticle excitations in great detail. We subsequently use this information to calculate the magnetic response within the conventional fermiology framework as applied in a large body of work for the hole-doped superconductors to find a profound disagreement between the theoretical expectations and the measurements: this approach predicts a steplike feature rather than a sharp resonance peak, it underestimates the intensity of the resonance by an order of magnitude, it suggests an unreasonable temperature dependence of the resonance, and most severely, it predicts that most of the spectral weight resides in incommensurate wings which are a key feature of the hole-doped cuprates but have never been observed in the electron-doped counterparts. Our findings strongly suggest that the magnetic fluctuations reflect the quantum-mechanical competition between antiferromagnetic and superconducting orders.
收录类别	SCI
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41225]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Kruger, F,Wilson, SD,Shan, L,et al. Magnetic fluctuations in n-type high-T-c superconductors reveal breakdown of fermiology: Experiments and Fermi-liquid/RPA calculations[J]. PHYSICAL REVIEW B,2007,76(9).
APA	Kruger, F.,Wilson, SD.,Shan, L.,Li, SL.,Huang, Y.,...&Zaanen, J.(2007).Magnetic fluctuations in n-type high-T-c superconductors reveal breakdown of fermiology: Experiments and Fermi-liquid/RPA calculations.PHYSICAL REVIEW B,76(9).
MLA	Kruger, F,et al."Magnetic fluctuations in n-type high-T-c superconductors reveal breakdown of fermiology: Experiments and Fermi-liquid/RPA calculations".PHYSICAL REVIEW B 76.9(2007).