Self-regulated Gd atom trapping in open Fe nanocorrals

Cao, Rongxing; Liu, Z.; Miao, B. F.; Sun, L. Z.; Wu, Di; You, Bo; Li, S. C.; Zhang, Weihua; Hu, An; Bader, S. D.; Ding, Haifeng

doi:10.1103/physrevb.90.045433

Cited by 7 publications

(8 citation statements)

References 34 publications

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“…Fe and Gd adatoms are deposited onto Ag(111) and the Fe nanocorrals are built via atom manipulation. As demonstrated previously 33 , stable open nanocorrals on the Ag(111) surface can be built with Fe adatoms that have a favorable diffusion barrier. Figure 1(a) shows the STM image of a 2 × 2 array of open Fe corrals with four different diameters (7.5, 8.5, 9.8 and 10.5 nm) on Ag(111).…”

Section: Resultsmentioning

confidence: 56%

“…Two characteristic peaks are observed that shift to lower energy with increasing corral diameter. We note that Gd adatoms are driven out of the scanning area with this scanning condition (−0.5 V, 1 nA) 33 .…”

Section: Resultsmentioning

confidence: 76%

“…Moreover, when a different condition (0.5 V, 2 pA) is used for the scanning, Gd adatoms can diffuse back to the scanning area and be trapped by the open corrals, driven by a surface-state-mediated, long-range interaction 33 . The opening in the corral forms a gate to regulate the flow of Gd atoms traveling in and out, resulting in quantized atom trapping and a suppression of statistical fluctuations, as demonstrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Previous findings via STM and STS have found that the electronic states can be modified by quantum confinement perpendicular to the surface 26 27 and on the surface 2 28 29 . Moreover, quantum confinement can influence atom diffusion 30 31 32 and suppress the statistical fluctuations in the number of atoms within a nanostructure 33 , resulting in fabrication with atomic-level precision. Therefore, exploring the electronic properties in this atomic structure will be interesting and meaningful for the atomic-level nanomaterial design.…”

mentioning

confidence: 99%

“…Herein we report on an experimental investigation of the electronic states of Gd adatoms trapped in open Fe corrals of varied size 33 as regulated by quantum confinement. STS results near the Fermi level show two characteristic spectroscopic peaks in empty corrals with the peak positions shift toward lower energy with increasing corral diameter.…”

mentioning

confidence: 99%

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Spectroscopic study of Gd nanostructures quantum confined in Fe corrals

Cao

Sun

Miao

et al. 2015

Sci Rep

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Low dimensional nanostructures have attracted attention due to their rich physical properties and potential applications. The essential factor for their functionality is their electronic properties, which can be modified by quantum confinement. Here the electronic states of Gd atom trapped in open Fe corrals on Ag(111) were studied via scanning tunneling spectroscopy. A single spectroscopic peak above the Fermi level is observed after Gd adatoms are trapped inside Fe corrals, while two peaks appear in empty corrals. The single peak position is close to the higher energy peak of the empty corrals. These findings, attributed to quantum confinement of the corrals and Gd structures trapped inside, are supported by tight-binding calculations. This demonstrates and provides insights into atom trapping in open corrals of various diameters, giving an alternative approach to modify the properties of nano-objects.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Spectroscopic study of Gd nanostructures quantum confined in Fe corrals

Cao

Sun

Miao

et al. 2015

Sci Rep

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Quantum size effect in nanocorrals: From fundamental to potential applications

Cao

Ding

2020

Applied Physics Letters

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Conventional silicon-based devices are approaching the scaling limits toward super miniaturization, where the quantum size effect naturally emerges with increasing importance. Exploring the quantum size effect may provide additional functionality and alternative architectures for information processing and computation. Scanning tunneling microscopy/spectroscopy is an ideal tool to explore such an opportunity as it can construct the devices in an atom-by-atom fashion and investigate their morphologies and properties down to the atomic level. Utilizing nanocorrals as examples, the quantum size effect is demonstrated to possess the great capability in guiding the adatom diffusion and the self-assembly, controlling the statistical fluctuation, tuning the Kondo temperature, etc. Besides these fundamentals, it also shows strong potential in logic operations as the basic logic gates are constructed.

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