Effect of Well Width and Barrier Width on I–V Characteristics of Armchair Graphene Nanoribbon based Resonant Tunneling Diode Structure

Mishra, Madhusudan; Das, N. R.; Sahoo, N. K.; Sahu, Trinath

doi:10.1109/devic50843.2021.9455884

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Graphene, by virtue of its favorable electrical and structural properties, has achieved a wide range of applications in the eld of modern electronics. From wearable gadgets to transparent electronic components, there is a keen demand for graphene-based devices these days [1][2][3][4][5][6][7][8]. Its knack for design of compact and e cient devices is an add-on to its novelty.…”

Section: Introductionmentioning

confidence: 99%

Hole-Embedded Graphene Metamaterial for THz Absorption: A New Approach for Efficient Device Design

Mishra,

Sahoo,

Sahu

2024

Preprint

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A new design is proposed for the realization of graphene metamaterials with enhanced robustness and absorption in the THz regime. The design uses the concept of embedding holes into a bilayer graphene sheet, which effectively works like a conventional fishnet-shaped metamaterial structure with better absorptance and spectral response features. Absorptance of both the structures are studied for multi-sheet configuration with sheet number (N), inter sheet distance (dil), and length of the resonating cavity (d). Interestingly the absorptance goes up with an increase in N for both the structures. Further, in the case of the proposed hole embedded structure, the rate of enhancement is more towards the higher N indicating improved performance. The study also reveals the effect of cavity length ‘d’ on absorptance. The absorptance of the metamaterials is optimized to a value of ~ 99%, for d = 22 µm, taking N = 8 and N = 7 for the cut-based and the hole embedded fishnet structure respectively. The proposed hole embedded design offers several benefits like it reduces design complexity, increases the robustness towards fabrication errors, needs less number of sheets, and shows a better spectral response. Such a design technique can be utilized to realize several other designs of meta materials.

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Section: Introductionmentioning

confidence: 99%

Hole-Embedded Graphene Metamaterial for THz Absorption: A New Approach for Efficient Device Design

Mishra,

Sahoo,

Sahu

2024

Preprint

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“…Here, the current flow does not suffer from low carrier mobility and charge storage effects, thereby giving rise to extremely fast operating devices with abrupt turn-on and turn-off facilities. Recently, the study of NDR in graphene has drawn potential research interest due to the feasibility of making a quantum well (QW) structure out of a single graphene sheet through structural modifications [26][27][28][29]. Double barrier quantum well (DBQW) structures have been realized by adjusting the width of armchair graphene nanoribbon (AGNR) to obtain NDR.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of armchair graphene nanoribbon resonant tunneling diode using V-shaped potential well

Mishra¹,

Das²,

Sahoo³

et al. 2021

Phys. Scr.

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We study the electron transport in armchair graphene nanoribbon (AGNR) resonant tunneling diode (RTD) using square and V-shaped potential well profiles. We use non-equilibrium Green’s function formalism to analyze the transmission and I-V characteristics. Results show that an enhancement in the peak current (Ip ) can be obtained by reducing the well width (Ww ) or barrier width (Wb ). As Ww decreases, Ip shifts to a higher peak voltage (Vp ), while there is almost no change in Vp with decreasing Wb . It is gratifying to note that there is an enhancement in Ip by about 1.6 times for a V-shaped well over a square well. Furthermore, in the case of a V-shaped well, the negative differential resistance occurs in a shorter voltage range, which may beneficial for ultra-fast switching and high-frequency signal generation. Our work anticipates the suitability of graphene, having better design flexibility, to develop ideally 2D RTDs for use in ultra-dense nano-electronic circuits and systems.

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Graphene Nanoribbon based Triple Barrier Double Quantum Well Resonant Tunneling Diode

Mishra

Sahu

Tripathy

et al. 2023

2023 IEEE Devices for Integrated Circuit (DevIC)

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Effect of Well Width and Barrier Width on I–V Characteristics of Armchair Graphene Nanoribbon based Resonant Tunneling Diode Structure

Cited by 5 publications

References 16 publications

Hole-Embedded Graphene Metamaterial for THz Absorption: A New Approach for Efficient Device Design

Hole-Embedded Graphene Metamaterial for THz Absorption: A New Approach for Efficient Device Design

Performance enhancement of armchair graphene nanoribbon resonant tunneling diode using V-shaped potential well

Graphene Nanoribbon based Triple Barrier Double Quantum Well Resonant Tunneling Diode

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