Uniform mixing of High-Tc superconductivity and antiferromagnetism on a single CuO2 plane of a Hg-based five-layered cuprate
Uniform mixing of High-Tc superconductivity and antiferromagnetism on a single CuO2 plane of a Hg-based five-layered cuprate
复制标题
DOI：
10.1103/physrevlett.96.087001
复制
发表时间：
2006-03-03
影响因子：
8.6
通讯作者：
Tanaka, Y
中科院分区：
文献类型：
--
作者：
Mukuda, H;Abe, M;Tanaka, Y
我们报道了一个位点选择性的Cu-NMR研究了欠掺杂的hg基五层高T-c铜HgBa2Ca4Cu5O12+ δ， T-c=72 K。发现在T-N=290 K时发生了反铁磁性（AFM），在三个内平面（IP）上表现出0.67-0.69 mu(B)的大反铁磁矩。该值与未掺杂铜酸盐的报告值相当，表明IP可能处于几乎未掺杂的状态。最令人惊讶的是，当M-AFM(OP)=0.1 mu(B)时，即使在导致超导性（SC）发生的两个外平面（OP）上也能检测到AFM顺序。在T-c=72 K时，高T-c SC可以在微观水平上与OP's的AFM均匀共存。这是在简单的环境下，在没有任何涡旋晶格和/或条纹秩序的情况下，AFM和SC在单个CuO2平面上均匀混合相的第一个微观证据。
We report a site selective Cu-NMR study on underdoped Hg-based five-layered high-T-c cuprate HgBa2Ca4Cu5O12+delta with a T-c=72 K. Antiferromagnetism (AFM) has been found to take place at T-N=290 K, exhibiting a large antiferromagnetic moment of 0.67-0.69 mu(B) at three inner planes (IP). This value is comparable to the values reported for nondoped cuprates, suggesting that the IP may be in a nearly nondoped regime. Most surprisingly, the AFM order is also detected with M-AFM(OP)=0.1 mu(B) even at two outer planes (OP) that are responsible for the onset of superconductivity (SC). The high-T-c SC at T-c=72 K can uniformly coexist on a microscopic level with the AFM at OP's. This is the first microscopic evidence for the uniform mixed phase of AFM and SC on a single CuO2 plane in a simple environment without any vortex lattice and/or stripe order.