Effects of surface structure and halogen substitution on electronic charge transfer in adlayers of (BETS)2-GaCl4 on silver surfaces

Ananthaneni, Sahithi; Rankin, Rees B.

doi:10.1016/j.susc.2019.01.004

Cited by 3 publications

(2 citation statements)

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“…For example, by using DFT calculations, Ananthaneni et al. [ 31 ] have shown that a charge transfer of 0.5 e is transferred from Ag(111) to GaCl 4 in a single layer of (BETS) 2 GaCl 4 . This partial charge transfer process can lead to a weak antiferromagnetic ordering in the GaCl 4 molecular chains via super‐exchange interactions.…”

Section: Resultsmentioning

confidence: 99%

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)₂GaCl₄ Organic Superconductor

Hassanien

Zhou

Kobayashi

2020

Adv Elect Materials

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Scanning tunneling microscopy and spectroscopy are presented to study the interplay between superconductivity and magnetism in a single‐layer organic d‐wave superconductor (BETS)2GaCl4 on Ag(111). Antiferromagnetic molecular chains of GaCl4 are spontaneously formed within (BETS)2GaCl4 superconducting single layer due to shortages of BETS dimers. Below transition temperature of 7 K, the superconducting order masks the antiferromagnetic order and dominates the electronic properties, showing a ubiquitous gap over the entire island with proximity effect across the island/Ag(111) interface. These features gradually decay with the rise in temperature giving way to a Kondo dip on GaCl4 chains, with additional inelastic vibronic features on (BETS)2GaCl4 stripes. The concurrent absence of these signals below Tc may be related to a renormalization process where both phonon and antiferromagnetic fluctuation exhibit a cooperative existence to mediate superconductivity in such d‐wave superconductors.

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Section: Resultsmentioning

confidence: 99%

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)₂GaCl₄ Organic Superconductor

Hassanien

Zhou

Kobayashi

2020

Adv Elect Materials

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“…[19] In case of adsorption on surfaces such as Ag(111), we have shown that these molecules form charge-transfer salt with similar motifs as the parent crystal. [20][21][22] Moreover, density functional theory calculations [23,24] have shown that the substrate also contributes to the charge-transfer process in the epitaxial layer by an average charge of about 0.4 electron; however, the total amount of charge transfer to GaCl 4 is still similar to the bulk crystal, i.e., %0.9 e. Accordingly, the dimers establish a delocalized electron state with an easy axis along the stacking direction. At a suitable substrate temperature, 125-230 K, molecules assemble into Kagome lattice as discussed in the following sections.…”

Section: Resultsmentioning

confidence: 99%

Tunable Flat Band in Large‐Scale Kagome Lattice of Single Layer (BETS)₂GaCl₄

Hassanien

2019

Physica Status Solidi (b)

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Kagome lattice is expected to be a perfect platform for hosting exotic emergent phenomena such as negative magnetism and unconventional superconductivity. However, the preparation of such a lattice on a scale of 100 nm or more, with a perfect crystalline order, especially in organic systems, is challenging. Herein, a facile method is presented to fabricate a large scale of epitaxial single‐layer organic Kagome lattice based on (BETS)2GaCl4 on Ag(111) (where BETS is bis(ethylenedithio)tetraselenafulvalene). The lattice accommodates guest molecules with size up to 1 nm, thus making it possible to host a variety of single molecular magnets. This possibility is demonstrated by the in situ selective encapsulation of GaCl4 radicals in the pores. Scanning tunneling microscopy and spectroscopy reveal that both the radical states and the trimer units exhibit sharp and spatially localized peaks at 1.08 and 1.42 eV, respectively. The persistence of these sharp features together with spatial localization, regardless of biasing conditions, suggests an evidence of a frustrated flat band with a possible tuning to incorporate topological order.

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Five-membered ring systems: with O and S (Se, Te) atoms

Aitken¹

2021

Progress in Heterocyclic Chemistry

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Effects of surface structure and halogen substitution on electronic charge transfer in adlayers of (BETS)2-GaCl4 on silver surfaces

Cited by 3 publications

References 40 publications

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)₂GaCl₄ Organic Superconductor

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)₂GaCl₄ Organic Superconductor

Tunable Flat Band in Large‐Scale Kagome Lattice of Single Layer (BETS)₂GaCl₄

Five-membered ring systems: with O and S (Se, Te) atoms

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Effects of surface structure and halogen substitution on electronic charge transfer in adlayers of (BETS)2-GaCl4 on silver surfaces

Cited by 3 publications

References 40 publications

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)2GaCl4 Organic Superconductor

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)2GaCl4 Organic Superconductor

Tunable Flat Band in Large‐Scale Kagome Lattice of Single Layer (BETS)2GaCl4

Five-membered ring systems: with O and S (Se, Te) atoms

Contact Info

Product

Resources

About

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)₂GaCl₄ Organic Superconductor

Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)₂GaCl₄ Organic Superconductor

Tunable Flat Band in Large‐Scale Kagome Lattice of Single Layer (BETS)₂GaCl₄