Solution-phase synthesized iron telluride nanostructures with controllable thermally triggered p-type to n-type transition

Zheng, Wei; Hong, Sung-Bum; Min, Bok Ki; Wu, Yue

doi:10.1039/c8nr06418k

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…Moreover, since FeTe 2 monolayers are predicted to preserve a ferromagnetic state due to magnetocrystalline anisotropy arising from spin-orbit coupling, further magneto-optic experiments are of interest to test theoretical predictions. Two-dimensional materials with ferromagnetic ground states attract great interest as they are possible candidates for spintronic and memory devices but can also be valuable in fundamental science studies. − Finally, since reproducible switching behavior without crystal structure changes has recently been reported in FeTe 2 nanostructures, it would be of interest to investigate the size dependence of switching properties in future devices made from FeTe 2 ultrathin crystals.…”

Section: Discussionmentioning

confidence: 99%

“…Two-dimensional materials with ferromagnetic ground states attract great interest as they are possible candidates for spintronic and memory devices but can also be valuable in fundamental science studies. 35−37 Finally, since reproducible switching behavior without crystal structure changes has recently been reported in FeTe 2 nanostructures, 38 it would be of interest to investigate the size dependence of switching properties in future devices made from FeTe 2 ultrathin crystals.…”

Section: ■ Discussionmentioning

confidence: 99%

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Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

Capitano

Liu

et al. 2021

ACS Omega

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Ultrathin crystals including monolayers have been reported for various transition-metal dichalcogenides (TMDCs) with van der Waals bonds in the crystal structure. Herein, we report a detailed synthesis procedure and characterization of ultrathin iron ditelluride crystals. This material crystallizes in an orthorhombic marcasite Pnnm crystal structure whose bonding is dominantly covalent and without loosely connected van der Waals (vdW) bonds, making monolayer FeTe 2 synthesis less straightforward than other TMDC monolayer syntheses. The chemical vapor deposition synthesis process described is simple, effective, and results in a range of crystal thicknesses from approximately 400 nm down to the FeTe 2 monolayer.

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Section: Discussionmentioning

confidence: 99%

Section: ■ Discussionmentioning

confidence: 99%

Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

Capitano

Liu

et al. 2021

ACS Omega

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“…It is experimentally observed that FeTe 2 crystal has an antiferromagnetic lowest energy phase with anisotropic behavior <∼80 K and a ferromagnetic (FM) state <30 K [10]. Additionally, FeTe 2 system exhibits bipolar conduction, which means that main carrier switches at a certain temperature, resulting in poor thermometric performance [12,13]. Moreover, An et al experimentally studied the impact of Ni doping on electrical and thermal properties of FeTe 2 , and found an increase in electrical conductivity with increasing temperature [14].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and robust n-type charge carrier density in Co-doped FeTe₂: strain strategy

Alvi

Nazir

2023

Phys. Scr.

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Herein, we investigated the combined effect of Co-doping and strain (biaxial [110] and hydrostatic [111]) on the thermodynamics and electronic structure of the FeTe2 motif using ab-initio calculations by considering the strong correlation effects. The pristine one has a non-magnetic semiconducting nature with an indirect band gap (E g ) of 0.384 eV. Interestingly, our results revealed that the Co-doping at the Fe site induced an n-type conductivity (i. e., few states are crossing the Fermi level from the valence to conduction band) in the system having a substantial charge carrier density magnitude of 0.14×10 21 cm^−3 . The metallicity mainly comprises the Co-3d orbitals along with a significant contribution from Fe-3d states. Thermodynamic, mechanical, and dynamical stability of the Co-doped FeTe2 structure is confirmed by computing the formation energetic, elastic constants, and phonon band structure, respectively. Generally, an increasing and decreasing trend in E g value is evident against the applied compressive and tensile strains having ranged from −5% to +5% for the case of the undoped system, respectively. On the other hand, the Co-doped structure maintained its n-type conduction against considered both types of strains. Moreover, it is demonstrated that compressive strains strengthen the charge carrier density amplitude, while tensile strains show a negative impact. Hence, the present work displays that robust n-type conductivity and stable structure of Co-dopedFeTe 2 system, makes it a desirable candidate for device applications.

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Electronic, Thermal, and Thermoelectric Properties of Ni-Doped FeTe2 Polycrystalline Alloys

Park

et al. 2022

Electron. Mater. Lett.

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Solution-phase synthesized iron telluride nanostructures with controllable thermally triggered p-type to n-type transition

Abstract: We report the solution-phase synthesis of iron telluride with controllable reversible switching behavior between p- and n-type conduction.

Cited by 3 publications

References 21 publications

Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

Thermodynamics and robust n-type charge carrier density in Co-doped FeTe₂: strain strategy

Electronic, Thermal, and Thermoelectric Properties of Ni-Doped FeTe2 Polycrystalline Alloys

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Solution-phase synthesized iron telluride nanostructures with controllable thermally triggered p-type to n-type transition

Abstract: We report the solution-phase synthesis of iron telluride with controllable reversible switching behavior between p- and n-type conduction.

Cited by 3 publications

References 21 publications

Synthesis and Characterization of Ultrathin FeTe2 Nanocrystals

Synthesis and Characterization of Ultrathin FeTe2 Nanocrystals

Thermodynamics and robust n-type charge carrier density in Co-doped FeTe2: strain strategy

Electronic, Thermal, and Thermoelectric Properties of Ni-Doped FeTe2 Polycrystalline Alloys

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Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

Thermodynamics and robust n-type charge carrier density in Co-doped FeTe₂: strain strategy