电子杂超导体Nd(2-x) Ce(x) CuO4中的电荷排序
Eduardo H da Silva Neto1, Riccardo Comin2, Feizhou He3
1Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada. Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada. Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany. Quantum Materials Program, Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada. ehda@physics.ubc.ca damascelli@physics.ubc.ca.
Science (New York, N.Y.)
|January 17, 2015
概括
电荷排序 (CO) 被发现在电子合的酸盐中,类似于孔合的版本. 这一发现为这些材料中电荷排序,反铁磁性和超导性之间的竞争提供了新的见解.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子材料是一种量子材料.
背景情况:
- 酸超导体表现出一种抗铁磁Mott绝缘状态,在使用兴奋剂时过渡到超导.
- 在孔化 (p型) 酸盐中,电荷排序 (CO) 不稳定性在伪间隙状态内与超导性竞争.
研究的目的:
- 为了研究电荷排序在n型酸盐Nd(2-x) Ce(x) CuO4.4中的存在和特征.
- 为了比较n型酸盐中的电荷排序与p型酸盐中观察到的电荷排序.
- 了解电荷排序,反铁磁和超导在酸盐中的关系.
主要方法:
- 使用了共振X射线散射测量.
- 该研究的重点是Nd(2-x) Ce(x) CuO4接近最佳的兴奋剂.
主要成果:
- 在n型酸盐Nd(2-x) Ce(x) CuO4.4中确认了电荷排序 (CO).
- 在Nd{2-x) Ce{x) CuO4中的CO具有与p型酸盐相似的周期性和方向.
- 在Nd(2-x) Ce(x) CuO4中,CO的出现发生在伪间隙温度以上,并与检测到的反铁磁波动相吻合.
结论:
- 在n型酸盐中发现的二氧化碳为研究其与反铁磁和超导的相互作用提供了新的途径.
- 这一发现为研究电荷排序现象建立了与p型酸盐平行系统.
- 结果表明,电荷排序,磁性波动和铜材料中超导性出现之间存在复杂的关系.
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