Manipulating the Topological Interface by Molecular Adsorbates: Adsorption of Co-Phthalocyanine on Bi<sub>2</sub>Se<sub>3</sub>

Caputo, Marco; Panighel, Mirco; Lisi, Simone; Khalil, Lama; Santo, Giovanni Di; Papalazarou, E.; Hruban, A.; Kończykowski, M.; Krusin‐Elbaum, L.; Aliev, Ziya S.; Бабанлы, М. Б.; Otrokov, M. M.; Politano, Antonio; Chulkov, Evgueni V.; Arnau, A.; Marinova, Vera; Das, Pranab K.; Fujii, Jun; Vobornik, I.; Perfetti, L.; Mugarza, Aitor; Goldoni, A.; Marsi, M.

doi:10.1021/acs.nanolett.5b02635

Cited by 51 publications

(55 citation statements)

References 45 publications

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“…Opening the portfolio of inorganic materials for molecular functionalization could create new opportunities currently only hinted at in the literature 76 . Recently, for example, it has been shown that the hybridization of molecules with skyrmions 77 and topological insulators [78][79][80][81] can be used to modify their topologically protected spin texture. In the specific case of topological insulators (Fig.…”

Section: Beyond Inorganic Ferromagnetic Materialsmentioning

confidence: 99%

Activating the molecular spinterface

2017

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The miniaturization trend in the semiconductor industry has led to the understanding that interfacial properties are crucial for device behaviour. Spintronics has not been alien to this trend, and phenomena such as preferential spin tunnelling, the spin-to-charge conversion due to the Rashba-Edelstein effect and the spin-momentum locking at the surface of topological insulators have arisen mainly from emergent interfacial properties, rather than the bulk of the constituent materials. In this Perspective we explore inorganic/molecular interfaces by looking closely at both sides of the interface. We describe recent developments and discuss the interface as an ideal platform for creating new spin effects. Finally, we outline possible technologies that can be generated thanks to the unique active tunability of molecular spinterfaces.

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Section: Beyond Inorganic Ferromagnetic Materialsmentioning

confidence: 99%

Activating the molecular spinterface

2017

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“…In real space this topological protection can be followed in the response to defects. The interface states will move around the defects by shifting away from the interface [8][9][10][11] , similar to the simplified picture for the edge state in the quantum hall effect. In momentum space, a topologically protected state has to cross the band gap and this crossing can't be lifted by small perturbations.…”

Section: Simplified View On Topology In Electronic Structurementioning

confidence: 99%

Spin- and angle-resolved photoemission on topological materials

Dil

2019

Electron. Struct.

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A historical review of spin-and angle-resolved photoemission on topological materials is presented, aimed at readers who are new to the field or who wish to obtain an overview of the activities in the field. The main focus lies on topological insulators, but also Weyl and other semimetals will be discussed. Further it will be explained why the measured spin polarisation from a spin polarised state should always add up to 100% and how spin interference effects influence the measured spin texture.

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“…Hence, despite the common charging behavior observed for TCNQ on a number of more reactive surfaces, on Bi 2 Se 3 TCNQ adsorbs as a neutral species forming characteristic hydrogen bonded networks, similarly to what observed on other inert surfaces ,. This is different to what has been reported for CoPc/Bi 2 Se 3 or MnPc/Bi 2 Te 3 ,, where a notable charge transfer to the substrate was measured: the adsorption of TCNQ on Bi 2 Se 3 (0001) does not significantly modify the TI surface electronic structure.…”

Section: Resultsmentioning

confidence: 50%

“…Recent calculations indicate that such MOCNs could display an out‐of‐plane magnetic anisotropy on a TI, break the time‐reversal symmetry and induce the opening of an energy gap at the Dirac point of the TSS. The first step towards the fabrication of this type of networks is to investigate the adsorption of a pure layer of electron acceptor molecules and to verify that, on their own, they do not induce a significant modification or disruption of the TSS Dirac cone, as observed for other molecular species on TIs or for similar molecular species on graphene …”

Section: Introductionmentioning

confidence: 99%

TCNQ Physisorption on the Topological Insulator Bi₂Se₃

et al. 2018

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Topological insulators are promising candidates for spintronic applications due to their topologically protected, spin-momentum locked and gapless surface states. The breaking of the time-reversal symmetry after the introduction of magnetic impurities, such as 3d transition metal atoms embedded in two-dimensional molecular networks, could lead to several phenomena interesting for device fabrication. The first step towards the fabrication of metal-organic coordination networks on the surface of a topological insulator is to investigate the adsorption of the pure molecular layer, which is the aim of this study. Here, the effect of the deposition of the electron acceptor 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules on the surface of a prototypical topological insulator, bismuth selenide (Bi Se ), is investigated. Scanning tunneling microscope images at low-temperature reveal the formation of a highly ordered two-dimensional molecular network. The essentially unperturbed electronic structure of the topological insulator observed by photoemission spectroscopy measurements demonstrates a negligible charge transfer between the molecular layer and the substrate. Density functional theory calculations confirm the picture of a weakly interacting adsorbed molecular layer. These results reveal significant potential of TCNQ for the realization of metal-organic coordination networks on the topological insulator surface.

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Manipulating the Topological Interface by Molecular Adsorbates: Adsorption of Co-Phthalocyanine on Bi₂Se₃

Cited by 51 publications

References 45 publications

Activating the molecular spinterface

Activating the molecular spinterface

Spin- and angle-resolved photoemission on topological materials

TCNQ Physisorption on the Topological Insulator Bi₂Se₃

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Manipulating the Topological Interface by Molecular Adsorbates: Adsorption of Co-Phthalocyanine on Bi2Se3

Cited by 51 publications

References 45 publications

Activating the molecular spinterface

Activating the molecular spinterface

Spin- and angle-resolved photoemission on topological materials

TCNQ Physisorption on the Topological Insulator Bi2Se3

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Resources

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Manipulating the Topological Interface by Molecular Adsorbates: Adsorption of Co-Phthalocyanine on Bi₂Se₃

TCNQ Physisorption on the Topological Insulator Bi₂Se₃