Research Progress of FeSe-based Superconductors Containing Ammonia/Organic Molecules Intercalation

Xu, Huashan; Wu, Shusheng; Zheng, Hui; Yin, Ruotong; Li, Yuanji; Wang, Xiaoxiong; Tang, Kaibin

doi:10.1007/s41061-022-00368-8

Cited by 9 publications

(3 citation statements)

References 167 publications

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“…Although, in most cases, the effects of ionic gating vanish when the gate voltage is removed, it has recently been shown that non-volatile charge doping of macroscopic bulk specimens of layered crystals is attainable via gate-driven intercalation of either hydrogen [ 61 , 62 , 63 , 64 ] or organic ions [ 65 ]. The latter has been proven to be an effective tool to tune the electronic ground state of layered FeSe [ 65 ] and to boost its superconducting transition temperature [ 66 , 67 ] well beyond that achieved via other means of bulk electron doping. These results make the investigation of the effects of gate-driven organic-ion intercalation in other layered materials highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Metallic Phase in Molybdenum Disulphide Induced via Gate-Driven Organic Ion Intercalation

2022

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Transition metal dichalcogenides exhibit rich phase diagrams dominated by the interplay of superconductivity and charge density waves, which often result in anomalies in the electric transport properties. Here, we employ the ionic gating technique to realize a tunable, non-volatile organic ion intercalation in bulk single crystals of molybdenum disulphide (MoS2). We demonstrate that this gate-driven organic ion intercalation induces a strong electron doping in the system without changing the pristine 2H crystal symmetry and triggers the emergence of a re-entrant insulator-to-metal transition. We show that the gate-induced metallic state exhibits clear anomalies in the temperature dependence of the resistivity with a natural explanation as signatures of the development of a charge-density wave phase which was previously observed in alkali-intercalated MoS2. The relatively large temperature at which the anomalies are observed (∼150 K), combined with the absence of any sign of doping-induced superconductivity down to ∼3 K, suggests that the two phases might be competing with each other to determine the electronic ground state of electron-doped MoS2.

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Section: Introductionmentioning

confidence: 99%

Anomalous Metallic Phase in Molybdenum Disulphide Induced via Gate-Driven Organic Ion Intercalation

2022

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“…Overall, other reports can be found in literature regarding the relation between charge carrier density, interlayer distance and the superconductive phenomenon. [26,40,[54][55][56][57] These works support the key role of organic compounds as tuning tools for layered compounds with superconducting properties, acting as cointercalating agents [58][59][60] or alone [44,53,61,62] .…”

Section: Engineering Superconductivity In Layered Materialsmentioning

confidence: 83%

Engineering Magnetism and Superconductivity in van der Waals Materials via Organic‐Ion Intercalation

Pereira

Tezze

Ormaza³

et al. 2023

Advanced Physics Research

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Intercalation is the insertion of guest species between the planes of a host van der Waals layered crystal. The process is accompanied by a significant change of the charge carrier density and by the expansion of the interlayer distance, overall leading to a modification of the electronic band structure of the layered material. This perspective focuses on the possibilities offered by the intercalation of organic ions toward finely tuning the physical properties of van der Waals materials, in particular their magnetism and superconductivity. How the intercalation of organic ions offers several advantages over conventional guest species such as alkali metals is highlighted, since a careful choice of the molecular intercalant opens the possibility to tailor the interlayer distance and the charge carrier density. Moreover, specific properties of the molecular guest can be transferred to the host material, as recently demonstrated by the intercalation of thermo‐responsive and chiral molecules. It is anticipated that other functional organic ions can be incorporated in van der Waals materials to provide additional optical and magnetic capabilities, with the potential to enable an optical control of magnetism and superconductivity.

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“…Iron selenide has been found to exhibit high‐temperature superconductivity, which is of great interest for developing efficient and practical superconducting materials for energy transmission and storage applications. [ 4 ] Furthermore, iron selenide thin films are also investigated for their potential in optoelectronic devices, such as solar cells and photodetectors, due to their tunable bandgap and excellent light‐absorbing properties. [ 5 ] Their versatility, coupled with the ability to control their growth and properties through different deposition techniques, make iron selenide thin films promising for advancing various technologies and driving further scientific exploration.…”

Section: Introductionmentioning

confidence: 99%

Iron Selenide Nanowire Bundles for Microwave Communication Technology

Qasrawi,

Toubasi

2023

Physica Status Solidi (a)

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Herein stacked layers of FeSe2 deposited onto ytterbium substrates using the thermal evaporation technique under a vacuum pressure of 10‐5 mbar are observed to form nanowire bundles (NB). Structural investigations on these NBs have shown the preferred growth of orthorhombic FeSe2 in addition to hexagonal ytterbium selenide as a minor phase in the structure of FeSe2. Impedance spectroscopy analyses conducted in the frequency domain of 0.01‐1.80 GHz shown that FeSe2 stacks can exhibit a negative capacitance effect and band stop filter characteristics. For these band stop filters, the refection coefficient (S11), the voltage standing wave ratios (VSWR) and the return loss (Lr) spectra displayed optimum values at a notch frequency of 0.87 GHz. In addition, computational analysis using Lorentz Oscillator (LO) Model has shown that the negativity of the capacitance is dominated by two oscillators centered at 0.08 GHz and 1.25 GHz. On the other hand, the insertion of aluminum nanosheets between the stacked layers of FeSe2 has been observed to decrease the negativity of the capacitance, increase the values of S11 and Lr and bring the VSWR closer to ideality. FeSe2 nanowire bundles resulting from FeSe2 stacks comprising Al nanosheets are considered suitable for microwave communication technology.This article is protected by copyright. All rights reserved.

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Research Progress of FeSe-based Superconductors Containing Ammonia/Organic Molecules Intercalation

Cited by 9 publications

References 167 publications

Anomalous Metallic Phase in Molybdenum Disulphide Induced via Gate-Driven Organic Ion Intercalation

Anomalous Metallic Phase in Molybdenum Disulphide Induced via Gate-Driven Organic Ion Intercalation

Engineering Magnetism and Superconductivity in van der Waals Materials via Organic‐Ion Intercalation

Iron Selenide Nanowire Bundles for Microwave Communication Technology

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