Superlattice of resonators on monolayer graphene created by intercalated gold nanoclusters
Superlattice of resonators on monolayer graphene created by intercalated gold nanoclusters
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DOI：
10.1209/0295-5075/91/66004
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
M. Cranney;F. Vonau;P. B. Pillai;E. Denys;D. Aubel;M. M. De Souza-M.;C. Bena;L. Simon
中科院分区：
文献类型：
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作者：
M. Cranney;F. Vonau;P. B. Pillai;E. Denys;D. Aubel;M. M. De Souza-M.;C. Bena;L. Simon
在这里，我们报告一种“新”类型的排序，允许修改的石墨烯单层（ML）的电子结构。我们已经在顶层单层石墨烯和外延石墨烯的缓冲层之间插入了小的金簇。我们发现，这些集群扰动ML石墨烯上的准粒子，作为量子点创建一个超晶格的共振器上的石墨烯ML，揭示了一个强大的驻波模式。使用傅里叶变换扫描隧道光谱学对驻波图案的详细分析强烈地表明，这种现象可以起因于石墨烯的能带结构的强烈修改和（或）起因于电荷密度波（CDW），其中涉及货车霍韦奇异性的大扩展。
Here we report on a “new” type of ordering which allows to modify the electronic structure of a graphene monolayer (ML). We have intercalated small gold clusters between the top monolayer graphene and the buffer layer of epitaxial graphene. We show that these clusters perturb the quasiparticles on the ML graphene, acting as quantum dots creating a superlattice of resonators on the graphene ML, as revealed by a strong pattern of standing waves. A detailed analysis of the standing-wave pattern using Fourier Transform Scanning Tunneling Spectroscopy strongly indicates that this phenomenon can arise from a strong modification of the band structure of graphene and (or) from Charge Density Waves (CDW) where a large extension of Van Hove singularities is involved.