Tantalum surface oxidation: Bond relaxation, energy entrapment, and electron polarization

Guo, Yongling; Bo, Maolin; Wang, Yan; Liu, Yonghui; Sun, Chang Q.; Huang, Yongli

doi:10.1016/j.apsusc.2016.11.010

Cited by 9 publications

(11 citation statements)

References 54 publications

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“…3 ) shows additional small peaks, indicating a small FM interaction between the adatom and the IFA for this particular case. Since the surface is theoretically shown to be metallic 36 , we expect an RKKY type of interaction playing a significant role in the coupling between the IFA and the Fe adatom. However, we cannot rule out the possibility of a superexchange mechanism mediated through the oxygen atoms, which are bridging the adatom and the IFA.…”

Section: Resultsmentioning

confidence: 99%

Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor

et al. 2018

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Magnetic atoms on a superconductor give rise to Yu-Shiba-Rusinov (YSR) states within the superconducting energy gap. A spin chain of magnetic adatoms on an s-wave superconductor may lead to topological superconductivity accompanied by the emergence of Majorana modes at the chain ends. For their usage in quantum computation, it is a prerequisite to artificially assemble the chains and control the exchange couplings between the spins in the chain and in the substrate. Here, using a scanning tunneling microscope tip, we demonstrate engineering of the energy levels of the YSR states by placing interstitial Fe atoms in close proximity to adsorbed Fe atoms on an oxidized Ta surface. Based on this prototype platform, we show that the interaction within a long chain can be strengthened by linking the adsorbed Fe atoms with the interstitial ones. Our work adds an important step towards the controlled design and manipulation of Majorana end states.

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Section: Resultsmentioning

confidence: 99%

Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor

et al. 2018

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“…The bond nature indicator m = 1 represents the variation rate of the bond energy E i as a response to the modification of the bond length . The interface bond energy ratio parameter γ describes the proportion of the defect-induced energy shifts on the surface, which can be calculated from eq . …”

Section: Resultsmentioning

confidence: 99%

Abnormal Deviation of Temperature–Resistivity Correlation for Nanostructured Delafossite CuCrO₂ Due to Local Reconfiguration

et al. 2020

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Nanostructured metal-oxide semiconductors stand at an essential frontier of nanoelectronics applications. However, their electrical properties and conductive mechanism above room temperature have not been investigated. In this study, we investigate the electrical conductivities of CuCrO 2 nanoparticles using spectroscopic and computational methods. An abnormal deviation of temperature−resistivity correlation was observed, which was attributed to the local reconfiguration of nanostructures based on the bond order length strength−bond charge model. This novel perspective about electrical conduction provides valuable insights into advanced surface nanomaterial designs.

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“…Based on the measured surface dependence of the Ta 4f BE shifts, we extracted ΔE 4f (B) for 2.713 eV 25 . Using Eq.…”

Section: Resultsmentioning

confidence: 99%

“…BOLS derived BE shifts ΔE v (i) = ΔE v (I) -ΔE v (B)25,28 , the bond energy ratio γ(%), local bond strain -ε I (%), relative bond energy density δE D (%) at different coverages of Na/Ta(110) interfaces.…”

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confidence: 99%

Electronic Structure and Bond Relaxation at Na/Ta(110) Interfaces and 1D‐Chain and 2D‐Ring Ta Metal Structures on Na(110)

Yao

et al. 2019

Physica Status Solidi (b)

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Combining bond–band–barrier (BBB), density‐functional theory (DFT) and zone‐selective electron spectroscopy (ZES) correlations, we investigate the bonding mechanisms at Na/Ta(110) and Ta/Na(110) interfaces. When the Ta metal coverage on the Na(110) surface is increased from 7/9 ML to 8/9 ML, the Ta surface distribution changed from one‐dimensional chains to two‐dimensional ring structures. Moreover, the Ta‐induced shifts in the surface binding energy (BE) on the Na(110) surface were dominated by quantum entrapment, whereas the Na‐induced shifts in the BE on the Ta(100) surface are dominated by polarization. DFT calculations reveal that the Ta atomic chain is more stable than the structure of the Ta atomic ring. The adsorption of Ta atoms on the Na(110) surface is more stable than the structure of the Na atoms adsorbing on the Ta(110) surface. The 1D chain formations and 2D ring structures on the Na(110) surface are identified and explained in this paper.

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Tantalum surface oxidation: Bond relaxation, energy entrapment, and electron polarization

Cited by 9 publications

References 54 publications

Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor

Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor

Abnormal Deviation of Temperature–Resistivity Correlation for Nanostructured Delafossite CuCrO₂ Due to Local Reconfiguration

Electronic Structure and Bond Relaxation at Na/Ta(110) Interfaces and 1D‐Chain and 2D‐Ring Ta Metal Structures on Na(110)

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Tantalum surface oxidation: Bond relaxation, energy entrapment, and electron polarization

Cited by 9 publications

References 54 publications

Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor

Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor

Abnormal Deviation of Temperature–Resistivity Correlation for Nanostructured Delafossite CuCrO2 Due to Local Reconfiguration

Electronic Structure and Bond Relaxation at Na/Ta(110) Interfaces and 1D‐Chain and 2D‐Ring Ta Metal Structures on Na(110)

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Product

Resources

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Abnormal Deviation of Temperature–Resistivity Correlation for Nanostructured Delafossite CuCrO₂ Due to Local Reconfiguration