Negative Differential Resistance Effect and Current Rectification in Ws2 Nanotubes: A Density Functional Theory Study

20 Pages Posted: 22 Feb 2023

See all articles by Mohammad Acef Ebrahimi

Mohammad Acef Ebrahimi

Imam Khomeini International University

Somaieh ahmadi

Imam Khomeini International University

Abdus Salam Sepahi Molla

affiliation not provided to SSRN

Santanu K. Maiti

Indian Statistical Institute, New Delhi - Indian Statistical Institute

Abstract

Electronic properties of (n,0) zigzag tungsten disulfide WS2 nanotubes and transport properties of (7,0) zigzag nanotube heterojunction are investigated by utilizing non-equilibrium Green's function formalism (NEGF). The results reveal that inclusion of the spin-orbit (SO) coupling significantly reduces the value of the band gap about 15.52\%. additionally, strong negative differential resistances take place in voltage regions between -0.2 and -0.4 V as well as between -0.5 and -0.6 V. Moreover, temperature dependent transport properties are elaborately investigated in this work. The results show that, as the temperature increases to 600K the stronger negative differential resistance occurs in both positive and negative bias voltages. Finally, a reasonably large degree of rectification ratio can be established. Our analysis can provide a comprehensive perspective on the NDR effect and current rectification in WS2 nanotubes and can be used as a beneficial guide for future designing of novel logical and nanoelectronic and spintronic devices.

Keywords: WS2 Nanotubes, Spin-Orbit Coupling, Negative Differential Resistances, Current Rectification

Suggested Citation

Ebrahimi, Mohammad Acef and ahmadi, Somaieh and Molla, Abdus Salam Sepahi and Maiti, Santanu K., Negative Differential Resistance Effect and Current Rectification in Ws2 Nanotubes: A Density Functional Theory Study. Available at SSRN: https://ssrn.com/abstract=4367517 or http://dx.doi.org/10.2139/ssrn.4367517

Mohammad Acef Ebrahimi

Imam Khomeini International University ( email )

Ghazvin
Ghazvin
Iran

Somaieh Ahmadi (Contact Author)

Imam Khomeini International University ( email )

Ghazvin
Ghazvin
Iran

Abdus Salam Sepahi Molla

affiliation not provided to SSRN ( email )

No Address Available

Santanu K. Maiti

Indian Statistical Institute, New Delhi - Indian Statistical Institute ( email )

New Delhi
New Delhi, 110016
India

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