Indian Journal of Physics

, Volume 92, Issue 12, pp 1541–1550 | Cite as

Non-linear model of nanoscale devices for memory application

  • J. DeviEmail author
  • B. Das
  • S. Sarma
  • P. Datta
Original Paper


COMSOL multiphysics software based model has been developed for the mem-devices comprising of undoped and doped CdSe/starch quantum dots and CdS/PVA nanocomposites as active layer. The assembly of quantum dots/nanocomposites can be represented by an equivalent structure comprising of almost infinitely alternating repetition of building blocks, each block having conducting and non-conducting regions. The time-dependent inductance (L) along with time-dependent resistance (R) and capacitance (C) are used as model input and the solutions are obtained using semiconductor, electric circuit and ordinary differential equation module. From this study it is clear that the mem-behaviour of the as-fabricated nanodevices having \(\frac{{R_{OFF} }}{{R_{ON} }} > 10\) can be well explained by the time-dependent R, C and L features of the nanoparticle assembly adopting COMSOL Multiphysics software. However, for devices with \(\frac{{R_{OFF} }}{{R_{ON} }}\) < 10, hysteresis behavior is governed by only time-dependent R and C features. As higher (> 10) \(\frac{{R_{OFF} }}{{R_{ON} }}\) values enhance efficiency of memory units, the present model incorporating time-dependent L in addition to time-dependent R and C will be useful for optimization in the device design for application as memory units.


Quantum dot Time-dependent inductance ROFF/RON ratio Memory devices Modeling and simulation 


85.30 De 73.21 La 73.43 cd 02.70-c 07.05.Tp 



The First Author J. Devi would like to acknowledge Department of Science and Technology, Govt. of India and third author S. Sarma would like to acknowledge University of South Africa, South Africa.


This study was funded by Department of Science and Technology, Govt. of India (Grant Number SR/WOS-A/ET-1102/2015).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Indian Association for the Cultivation of Science 2018

Authors and Affiliations

  1. 1.Department of Electronics and Communication TechnologyGauhati UniversityGuwahatiIndia
  2. 2.Department of PhysicsPandu CollegeGuwahatiIndia
  3. 3.Department of PhysicsUniversity of South AfricaPretoriaSouth Africa

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