Surender Pratap

16 Questions 47 Answers 0 Followers

Questions related from Surender Pratap

Participation ratio in disordered case?

Why we need to calculate inverse participation ration in our system,what it tells physically about the system,and why we should calculate it?Is there any specific reason to calculate this quantity...

04 April 2016 9,229 2 View

Any advice about the Thouless formula in weak localization?

Thouless formula works in quasi dimensional case or in any dimensions. I am trying in case of quasi 1-dimensional case and localization length is not coming exact.

26 November 2015 3,855 4 View

Is anyone familiar with defects in graphene nanoribbons?

I want to add defects in my graphene nanoribbon system,how i can do that,I am using Sancho-Rubio iterative scheme in my calculation.Please share your views . Thanks

22 July 2015 2,995 6 View

Why does the bandgap not decrease with width of GNR in Zigzag case while it happens in armchair case?

AS i have seen in one reference that bandgap does not decrease with increase in width in case of zigzag graphene nanoribbon case while it happens in armchair case,why it happens so.

20 July 2015 875 2 View

Any advice regarding the calculation of voltage for graphene nano ribbons?

I have calculated Transmission function as well self energies for GNR ,as well as LDOS(local density of states),i want to plot IV curve ,but i have value fo current ,for transmission function,but...

11 July 2015 4,114 1 View

Should there be symmetry in local density of states?

Should there be symmetry in local density of states, when we are simulating graphene nano ribbon or not? Please share your views. regards

02 July 2015 316 1 View

How do I determine transmission function in graphene nano ribbon system?

When electrons used to interact with source with Channel ,where we have kept our GNR,and both sides we have kept graphene electrodes,we can calculate Transmission function by simply the Fermi...

01 July 2015 8,584 9 View

Edge effects in GNR means graphene nano ribbon in nanoelectronics?

How do edge effects play a role in GNR? How can we understand it physically.

06 June 2015 4,350 7 View

Could someone help me modelling the electrical response of various nanotube?

I have calculated the diameter of a SWNT to be 1 nm use an application. I want to extend this to model double wall nanotubes and MWNT. When I increase the diameter above 1 nm the electrical...

16 May 2015 9,952 4 View

Can we use the Dirac equation with NEGF to solve the GNR problem, in the one dimensional case?

Can we use Dirac equation with NEGF to solve GNR problem ,in One -Dimensional case or not.when we have lattice of the order of M by M.

13 May 2015 1,112 3 View

Anyone familiar with electron-electron interaction?

Electron-electron interaction can be incorporated only through Phase breaking potential.How we can say this while as far as i know it can be approximately calculated by Schrodinger-Poisson solver...

12 May 2015 3,510 3 View

Can we get the same results of NEGF with Transfer matrix approach to 2-dimensional system?

12 May 2015 7,522 3 View

Why DFT underestimate band gaps in calculation in case of graphene nanoribbons?

Why DFT underestimate band gaps in calculation in case of graphene nanoribbons

11 May 2015 9,700 12 View

Why do we get a number of dispersion relations equal to two times that of the number of modes or sub bands when we are talking about ballistic case,?

When we are talking about ballistic case,why we are getting number of dispersion relation is equal to two times than that of number of modes or sub bands?

14 April 2015 3,148 2 View

What is the need of Sum rule in S-matrix?

In Conductance Matrix.

04 April 2014 6,442 2 View

Can anybody recommend a book regarding Geodesics in gravitation?

Like in plane, sphere or in cone trajectory

22 January 2012 8,446 9 View