Fermi nesting between atomic wires with strong spin-orbit coupling.
Fermi nesting between atomic wires with strong spin-orbit coupling.
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具有强自旋轨道耦合的原子线之间的费米嵌套
DOI：
10.1103/physrevlett.109.266401
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发表时间：
2012
影响因子：
8.6
通讯作者：
J. H. Dil
中科院分区：
文献类型：
--
作者：
C. Tegenkamp;D. Lükermann;H. Pfnür;B. Slomski;G. Landolt;J. H. Dil
超晶格结构、带填充因子和自旋轨道耦合之间的相互作用导致在Si上生长的原子铅线阵列具有高度相关的电子自旋和电荷状态（557）。通过自旋和角分辨光发射光谱，发现靠近费米表面的自旋织构是交替的和等距的；因此，费米嵌套发生在具有相同自旋螺旋度的带之间，在导线的方向上产生自旋极化的电荷密度波。两个Rashba通道的非相叠加表现为一个特别大的Rashba分裂，其中是一个由线间距离定义的互易晶格向量，适合反铁磁有序链结构中的自旋密度波模型。对沿导线的自旋极化输运的意义将进行讨论。
The mutual interplay between superlattice structures, band filling factors, and spin-orbit coupling results in a highly correlated electronic spin and charge state found for an array of atomic Pb wires grown on Si(557). By means of spin- and angle-resolved photoemission spectroscopy, the spin texture close to the Fermi surface was found to be alternating and equidistant; thus, Fermi nesting occurs in between bands with the same spin helicity, giving rise to spin-polarized charge-density waves in the direction across the wires. An out-of-phase superposition of both Rashba channels is manifested by an extraordinary large Rashba splitting of, whereis a reciprocal lattice vector defined by the interwire distance and fits into the model of spin-density waves in antiferromagnetically ordered chain structures. The implications towards spin-polarized transport along the wires will be discussed.