论文标题
杂质金属粉碎层中的条纹
Stripes in heterovalent metal-doped cuprates
论文作者
论文摘要
掺杂$ la_2cuo_ {4} $带有碱性地点，$ ae = sr，ba $在$ la_ {2-y-x} ln_yae_xcuo_ {4} $（$ ln = $ ln = $ $ nd，eu $）中生成孔。一小部分孔，$ \ check {p} \ le $ $ 0.02 $，抑制3D-AFM。其余的是$ o $ $ $原子在$ CO_2 $飞机中的两孔。由$ o $原子形成的超级晶格可引起充电订单条纹和磁化条纹，并具有不可通信的$ q_ {c，m}（x）（x）\ propto \ sqrt {x- \ cechch {p}} $ $ x <\ x <\ x <\ x <\ x <\ x <\ x <\ x <x} $ ncorts $ qud $ q.磁矩的反平行方向$ \ mathbf {m}（o）$对$ q_m（x）= \ frac {1} {2} Q_C（x）$的耦合产生自然解释。掺杂$ nd_2cuo_ {4} $ with $ ce $生成铜原子成对的电子。这说明了$ n $掺杂的化合物的不同属性。当$ n $ doped时，$ q_c（x）\ propto \ sqrt {x} $。高于阈值温度$ t'$，电子孔对是热生成的，但随后分开以$ cu $和$ o $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $。这打破了充电顺序和磁化条纹的不可通信性的锁定，$ q_m（x）\ ne \ frac {1} {2} {2} q_c（x）$。
Doping $La_2CuO_{4}$ with alkaline-earth, $Ae= Sr,Ba$ generates holes in $La_{2-y-x}Ln_yAe_xCuO_{4}$ ($Ln =$ $Nd,Eu$). A small fraction of the holes, $\check{p} \le $ $0.02$, suppresses 3D-AFM. The rest resides as double holes at $O$ atoms in the $CuO_2$ planes. The superlattice, formed by the $O$ atoms, gives rise to both charge order stripes and magnetization stripes with incommensurability $q_{c,m}(x) \propto \sqrt{x-\check{p}}$ for $Ae$ doping $x < \hat{x}$, but constant $q_c$ beyond. Antiparallel orientation of magnetic moments $\mathbf{m}(O)$ yields a natural explanation for the coupling of $q_m(x) = \frac{1}{2} q_c(x)$. Doping $Nd_2CuO_{4}$ with $Ce$ generates electrons that reside pairwise in copper atoms. This accounts for the different properties of $n$-doped compounds. When $n$-doped, $q_c(x) \propto \sqrt{x}$. Above a threshold temperature $T'$, electron-hole pairs are thermally generated, but then separate to reside pairwise at $Cu$ and $O$ atoms. This breaks the locking of the incommensurability of charge order and magnetization stripes, $q_m(x) \ne \frac{1}{2} q_c(x)$.
