Strain Dependent Carrier Mobility in 8 − Pmmn Borophene: ab-initio study

Tomar, Shalini; Rastogi, Priyank; Bhadoria, B. S.; Bhowmick, Somnath; Agarwal, Amit; Chauhan, Yogesh Singh

doi:10.1109/conecct.2018.8482369

Cited by 2 publications

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“…Borophene, the lightest elemental Dirac material capable of two-electron-three-center binding has intriguing crystallographic structures (β 12 and X 3 being primary phases which are fits extraordinarily well in that role vis-à-vis other existing 2D materials (see Figure 1a). [9][10][11][12][13][14]16] Ridgelines can act as excellent anchors for molecules and therefore the simplistic device can deliver ultrasensitive molecular sensing. Apart from its applications in strain and light sensing, borophene is tipped to be excellent in terahertz plasmonic waveguiding.…”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12][13] Anisotropic atomic ordering results in enhanced electronic mobility ≈1.82 × 10 6 cm 2 V −1 s −1 , Young's modulus ≈398 N m −1 , and thermal conductivity along atomic ridgelines. [14,15] In particular, for flexible electronic as well as spintronic chip applications, high electron mobility and Young's modulus are desirable simultaneously and borophene Borophene, the lightest among all Xenes, possesses extreme electronic mobility along with high carrier density and high Young's modulus. To accomplish device-quality borophene, novel approaches of realization of monolayers need to be urgently explored.…”

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confidence: 99%

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Borophene via Micromechanical Exfoliation

et al. 2021

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metallic), is a new sensation in the flatland. [1][2][3] Incidentally, among various 2D materials, while boron nitride (BN) has large Young's modulus but compromised mobility, phosphorene and silicene have appreciable carrier mobility but compromised elastic behavior. [4] Graphene, considered the wonder material of this century fairs exceedingly well and its carrier mobility, as well as Young's modulus, are simultaneously high, which places it at a different pedestal. [5,6] However, e-h symmetry and spin symmetry in graphene result in insufficient signal/noise ratio in electronic as well as spintronic chips. [7] Borophene, being metallic in both β 12 and X 3 crystallographic phases, also has excellent elastic strength and electronic mobility, which altogether places it at a significant pedestal among 2D materials. The evolution of borophene is expected to bring in new dimensions to 2D-materialbased next-generation devices [8] (see the schematic plot in Figure 1a for the comparative presentation of ln (mobility) vs Young's modulus for various 2D materials). [9][10][11][12][13] Anisotropic atomic ordering results in enhanced electronic mobility ≈1.82 × 10 6 cm 2 V −1 s −1 , Young's modulus ≈398 N m −1 , and thermal conductivity along atomic ridgelines. [14,15] In particular, for flexible electronic as well as spintronic chip applications, high electron mobility and Young's modulus are desirable simultaneously and borophene Borophene, the lightest among all Xenes, possesses extreme electronic mobility along with high carrier density and high Young's modulus. To accomplish device-quality borophene, novel approaches of realization of monolayers need to be urgently explored. In this work, micromechanical exfoliation is discovered to result in mono-and few-layered borophene of device quality. Borophene sheets are successfully fabricated down to monolayer thickness. Distinct crystallographic phases of borophene viz. XRD study reveals crystallographic phase transition from rhombohedral to several other eigen phases of borophene. The role of the destination substrates is held crucial in determining the final phase of the transferred sheet. The exfoliation energy is calculated by density functional theory. Molecular dynamics simulations are used to simulate the exfoliation process. Heterolayers of borophene, with black phosphorene (BP) or with molybdenum disulfide (MoS 2 ) atomic sheets, are found to result in photoexcited coupling quantum states. Gold-coated borophene bestows promising anchoring capability for surface-enhanced Raman spectroscopy (SERS). Successful demonstration of the electronic behavior of micromechanically exfoliated borophene and excitonic behavior of borophene-based heterolayers will guide future generation devices not only in electronics and excitonics, but also in thermal management, electronic packaging, hydrogen storage, hybrid energy storage, and clean energy solutions.

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Section: Introductionmentioning

confidence: 99%

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Borophene via Micromechanical Exfoliation

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“…5 Owing to the anisotropy in its atomic structure, besides being metallic, the β 12 phase possesses enhanced electronic mobility (∼1.82 × 10 6 cm 2 v −1 s −1 ), significantly high Young's modulus (∼398 N m −1 ) and ferromagnetic properties at room temperature, bolstering its candidature for Flextronics and spintronics. 5–8 Borophene has been demonstrated to be an excellent material for sensors of gases, light, and tiny molecules and a potential anode material for energy storage devices. 9,10 Borophene exhibits strong capability as an anodic electrode material that can be used in rechargeable Li-ion batteries (LIBs), Na-ion batteries (SIBs), and Mg-ion batteries (MIBs).…”

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