Visualizing buried silicon atoms at the Cd-Si(111)-
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 interface with localized electrons

Tao, Min-Long; Xiao, Hua-Fang; Sun, Kai; Tu, Yu-Bing; Yuan, Hongkuan; Xiong, Zuhong; Wang, Junzhong; Xue, Qi‐Kun

doi:10.1103/physrevb.96.125410

Cited by 12 publications

(11 citation statements)

References 43 publications

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“…64 The weak humps within the HOMO–LUMO gap can be attributed to the quantum well states from the Cd(0001) thin films. 46…”

Section: Resultsmentioning

confidence: 99%

“…1(a)], and perfect electronic transparency resulted from quantum-well states. 46 Pentacene molecules were deposited by sublimation from a homemade tantalum boat with the substrate temperature held at room temperature (RT), and the deposition rate was 0.05 ML per min. The deposition amount of pentacene molecules was controlled by regulating the deposition time.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

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Structural transition and interconversion between the 2D self-assembled structures of pentacene

Shi

Tao

Sun

et al. 2022

Phys. Chem. Chem. Phys.

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“…64 The weak humps within the HOMO–LUMO gap can be attributed to the quantum well states from the Cd(0001) thin films. 46…”

Section: Resultsmentioning

confidence: 99%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Structural transition and interconversion between the 2D self-assembled structures of pentacene

Shi

Tao

Sun

et al. 2022

Phys. Chem. Chem. Phys.

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“…Moreover, the effect of substrate screening may also reduce the HOMO–LUMO gap, through reducing the intramolecular Coulomb repulsion [ 50 ]. In addition to the peaks corresponding to HOMO and LUMO, there are also small peaks appeared in the gap, which result from the surface states or quantum well state in the Cd (0001) films [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…Cd atoms with a purity of 99.998% were thermally evaporated onto the Si (111) substrate from a quartz crucible by controlling the current. Deposition of 15 monolayer (ML) Cd at room temperature results in flat and smooth Cd (0001) films, which exhibit a perfect transparency due to the strong anisotropic electron motion with large lateral effective mass [45]. C 60 were evaporated from a homemade tantalum boat at a rate of 0.4 ML/min with the temperature of 770 K. After the deposition, the sample was transferred into the LT-STM chamber.…”

Section: Methodsmentioning

confidence: 99%

Orientation Ordering and Chiral Superstructures in Fullerene Monolayer on Cd (0001)

et al. 2020

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The structure of C60 thin films grown on Cd (0001) surface has been investigated from submonolayer to second monolayer regimes with a low-temperature scanning tunneling microscopy (STM). There are different C60 domains with various misorientation angles relative to the lattice directions of Cd (0001). In the (2√3 × 2√3) R30° domain, orientational disorder of the individual C60 molecules with either pentagon, hexagon, or 6:6 bond facing up has been observed. However, orientation ordering appeared in the R26° domain such that all the C60 molecules adopt the same orientation with the 6:6 bond facing up. In particular, complex chiral motifs composed of seven C60 molecules with clockwise or anticlockwise handedness have been observed in the R4° and R8° domains, respectively. Scanning tunneling spectroscopy (STS) measurements reveal a reduced HOMO–LOMO gap of 2.1 eV for the C60 molecules adsorbed on Cd (0001) due to the substrate screening and charge transfer from Cd to C60 molecules.

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“…45 In this work, we studied the adsorption-induced chirality and chiral self-assembly of H 2 Pc on the substrate of divalent hexagonal close-packed metal Cd(0001), which presents a novel electronic transparency and quantum-well states. 46 It is found that H 2 Pc molecules adopt two different azimuthal orientations, which allow us to perform a comparative study on the origin of adsorption-induced chirality. The not-aligned molecules reveal a chiral contrast at low bias and achiral motif at high bias, while the aligned molecules always show a symmetric contrast irrespective the bias voltages.…”

Section: Introductionmentioning

confidence: 99%

Coexistence of Chiral and Achiral Adsorptions of Metal-Free Phthalocyanine Molecules on Cd(0001)

Wang

Shi

et al. 2021

J. Phys. Chem. C

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We report the single molecule chirality and chiral selfassembly of the achiral phthalocyanine (H 2 Pc) molecules on Cd(0001) surface. Uniaxial ordering has been found in the submonolayer regime with individual H 2 Pc molecules aligned or not aligned to the lattice directions of Cd(0001). High-resolution STM images show that the not-aligned molecules exhibit a chiral motif at low bias and a symmetric motif at high bias, whereas the aligned molecules always show a symmetric contrast regardless of the voltage amplitudes. First-principles calculations demonstrate that the observed chiral motifs arise from the symmetry break of molecular frontier orbitals driven by the charge transfer from substrate to molecule, while the molecular frames of not-aligned H 2 Pc remain symmetric without structural distortion. In addition, the chiral self-assembly of H 2 Pc with pinwheel-like patterns has been realized in the long-range order domain. These results are significant for understanding the interplay between chiral structures and molecule−substrate interaction.

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Visualizing buried silicon atoms at the Cd-Si(111)- 7×7 interface with localized electrons

Cited by 12 publications

References 43 publications

Structural transition and interconversion between the 2D self-assembled structures of pentacene

Structural transition and interconversion between the 2D self-assembled structures of pentacene

Orientation Ordering and Chiral Superstructures in Fullerene Monolayer on Cd (0001)

Coexistence of Chiral and Achiral Adsorptions of Metal-Free Phthalocyanine Molecules on Cd(0001)

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