Graphene-silicene bilayer: A nanocapacitor with permanent dipole and piezoelectricity effect

Peymanirad, F.; Neek-Amal, M.; Beheshtian, Javad; Peeters, F. M.

doi:10.1103/physrevb.92.155113

Cited by 20 publications

(15 citation statements)

References 19 publications

(23 reference statements)

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“…One of the key issues are to development of an appropriate material for nanocapacitors electrode, which should have large specific capacitance are poorly abundant. Given a great interest in nanocapacitors, − we are going to employ studied systems as nanocapacitors. For this, we have calculated dipole moment P (D), stored charge Q s (|e|), stored energy E s (eV), and capacitance C (F).…”

Section: Resultsmentioning

confidence: 99%

“…Supercapacitors and nanocapacitors are standouts among the most interesting electrical energy storage devices because of their high power density, operation in an extensive variety of temperatures, no memory impact, long life cycle, and great stability. − The electronic double-layer capacitor (EDLC) known as supercapacitors, which can store energy in the form of electricity by the electrode–electrolyte interface under a bias voltage. − It is conceivable to consider higher estimation of the capacitance of EDLC than a conventional dielectric capacitor, while in case of metal electrode, EDLC is extremely high because of the large electronic density of states at the Fermi level. Two-dimensional (2D) materials, such as graphene, in which quantum capacitance and EDLC have the same sequence of magnitude, thereby greatly influence the total capacitance.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Investigation of Metallic Nanolayers For Charge-Storage Applications

Kansara

Gupta

Sonvane

et al. 2018

ACS Appl. Energy Mater.

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We report the first time that metallic homostructure of aluminene (Al) and antimonene (Sb) materials are the promising materials for the electric charge storage as a nanocapacitors. In this work, we have proposed two various phases of capacitor, namely, hexagonal (H) and trigonal (T) phases. Here, we have investigated the electronic properties, visualization of molecular orbitals, van der Waals (vdW) energy between layers, and supercapacitance properties, such as dipole moment (P), charge stored (Q s), energy stored (E s), and capacitance (C). It is found that the Sb bilayer has higher capacitance values than Al bilayer. Instead of that, we have also focused on the various pristine homobilayer of boron (B), carbon (C), silicon (Si), phosphorus (P), gallium (Ga), germanium (Ge), arsenic (As), and indium (In) and heterobilayers of pristine C and Al, pristine C and Sb, pristine C and Si, pristine C and Sn, pristine C and As, and pristine P and Si for H and T phases, respectively, and results are compared with Al and Sb. Our investigated energy storage, charge, and capacitance values are in better agreement with the previously reported works. The capacitance value increased accordingly to the external electric field and behave as an ideal nanocapacitor. The results suggest that Al- and Sb-homobilayer could be flexible method for building nanoscale capacitors and nanocircuits.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation of Metallic Nanolayers For Charge-Storage Applications

Kansara

Gupta

Sonvane

et al. 2018

ACS Appl. Energy Mater.

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“…In addition, silicene‐based van der Waals heterostructures are predicted to have fascinating physical properties. The graphene‐silicene vertical heterostructure is predicted to be a promising candidate as anode material and nanocapacitor, and the silicene–arsenene vertical heterostructure is predicted to be useful in nanoelectronic and optoelectronic devices …”

mentioning

confidence: 99%

“…Moreover, silicene‐based van der Waals heterostructures, which have been studied theoretically, have not been experimentally demonstrated yet. Kiraly et al deposited carbon and silicon on Ag(111) surface and found both lateral and vertical graphene‐silicon heterostructures, but the Si atoms are sp 3 ‐bonded as in bulk crystalline Si, not silicene.…”

mentioning

confidence: 99%

Stable Silicene in Graphene/Silicene Van der Waals Heterostructures

Zhang

Wang

et al. 2018

Advanced Materials

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anode material [14,15] and nanocapacitor, [16] and the silicene-arsenene vertical heterostructure is predicted to be useful in nanoelectronic and optoelectronic devices. [17] On the other hand, the experimental fabrication of silicene-based devices remains substantially challenging because silicene itself is unstable in air. [18,19] A silicene field-effect transistor (FET) was recently fabricated by Tao et al. through a growthtransfer-fabrication approach. [13,20] A roomtemperature mobility of ≈100 cm 2 V −1 s −1 was measured in their device, which, however, degraded in air after ≈2 min. Du et al. proposed another method to increase the chemical resistance of silicene to oxygen. [21] They fabricated bilayer silicene on Ag(111) and intercalated oxygen atoms which oxidized the bottom layer. While the stability of the top silicene layer improved, Raman data indicate extensive degradation of the sample in air after 120 h. Molle et al. successfully stabilized silicene by capping it with Al or Al 2 O 3 film. [22] Silicene encapsulated between the capping layer and the metal substrate was shown to be stable in ambient conditions, but the existence of a few-nm-thick capping layer does not allow the fabrication of silicene-based heterostructures.Moreover, silicene-based van der Waals heterostructures, which have been studied theoretically, [14][15][16][17] have not been experimentally demonstrated yet. Kiraly et al. deposited carbon and silicon on Ag(111) surface and found both lateral and vertical graphene-silicon heterostructures, but the Si atoms are sp 3 -bonded as in bulk crystalline Si, [23] not silicene. De Crescenzi et al. demonstrated the growth of silicene nanosheets on a graphite surface in ultrahigh vacuum. [24] While the interaction between the silicene layer and the graphite was found to be van der Waals type, the structure would be unstable in air.In this paper, we report the experimental fabrication of graphene/silicene van der Waals heterostructures. The graphene layer is grown first on a Ru(0001) substrate and silicene is constructed under it by Si intercalation. By controlling the amount of silicon, different types of silicene nanostructures are fabricated under graphene and imaged by scanning tunneling microscopy (STM). At low dosage, a periodic array of silicene-like patches under the atop regions of the graphene moiré pattern is a new type of intrinsically patterned [25] 2D material. At higher dosages, the intercalated Si forms a silicene monolayer. Covalent bonding between neighboring Si atoms in this silicene layer and weak interactions between graphene Silicene-based van der Waals heterostructures are theoretically predicted to have interesting physical properties, but their experimental fabrication has remained a challenge because of the easy oxidation of silicene in air. Here, the fabrication of graphene/silicene van der Waals heterostructures by silicon intercalation is reported. Density functional theory calculations show weak interactions between graphene and silicene layers, confirming the f...

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“…The electric field and hence induced electrostatic charging are electronically the most interesting excitation, which can exfoliate single layers from multilayers, 40,41 control the adatom adsorption and desorption, 42,43 store energy [44][45][46] and tune the electronic structure [47][48][49] in 2D materials. Charging can be achieved by external electric field or by optical excitation, whereby valence electrons occupy conduction states by creating e-h pairs maintaining the charge neutrality.…”

Section: Temperature Strain and Charge Induced Phase Changesmentioning

confidence: 99%

Temperature, strain and charge mediated multiple and dynamical phase changes of selenium and tellurium

et al. 2020

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Graphene-silicene bilayer: A nanocapacitor with permanent dipole and piezoelectricity effect

Cited by 20 publications

References 19 publications

Theoretical Investigation of Metallic Nanolayers For Charge-Storage Applications

Theoretical Investigation of Metallic Nanolayers For Charge-Storage Applications

Stable Silicene in Graphene/Silicene Van der Waals Heterostructures

Temperature, strain and charge mediated multiple and dynamical phase changes of selenium and tellurium

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