Regarding lanczos algorithm in matlab?

Is there any inbuilt lanczos algortihm in matlab,or we need to write ourselve script for this,since i want to solve Tri diagonal Hamiltonain actually in matlab,so any body has any idea . regards

05 June 2016 5,706 7 View

Eigenvalues of random cases in matlab?

I am calculating eigen values and eigen function with eig function in matlab ,but it is giving wrong answers ,means accuracy wise, is there any other function in matlab ,like in numerical recipes...

05 June 2016 8,910 11 View

Bound states inside the graphene system?

How we can determine number of bound states in the Zigzag graphene nanoribbon?Any idea what could be the maximum number of bound states in the Zigzag graphene nanoribon case

04 May 2016 7,489 0 View

Localization in two dimensional case?

Why the localization as well mobility should increase in two dimensions ,if we are moving from 2 to 3 dimensional case,should these two physical things should keep on moving or not.

31 December 2015 3,802 4 View

Corrugated graphene nanoribbons?

How this corrugated graphene nanoribbons differs from zigzag graphene nanoribbons.Why 2-D lattice cant exist at finite temperature .Please share your views. with regards

07 August 2015 8,688 0 View

Retarded Green's function?

In my GNR(graphene nano ribbon system,i am getting retarded green's function 's values as matrices but in each element very small terms are being subtracted ,as i understand it must be positive...

06 July 2015 4,820 0 View

Regarding hopping terms in graphene nanoribbons?

Can any body suggests that hopping terms can be t times exp(i^*phi),where phi is any value,we like .Is it possible that we can keep the value like this,what it means physics wise . regards

05 June 2015 6,613 2 View

Fermi energy in Graphene nano ribbons?

I am simulating graphene nano ribbons,and i want to add my magnetic field term in Hamiltonian,is there any other method than Pierls Substitution or not. regards

05 June 2015 2,386 40 View

Regarding graphene nano ribbon?

we can simulate single walled carbon nanotube up to app 1nm diameter,what will happen in case of graphene nano ribbon ,is there limitation in this case like it was in carbon nanotube single walled...

05 June 2015 9,189 4 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...

04 May 2015 8,961 4 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

What are the new 2D nanomaterials were used for Silver nanoparticles stabilization?

In the stabilization of AgNPs are vital in current research interest. However, some of the 2D nano-materials like graphene oxide, MoS2, etc... previously used to stabilize it. But still they shown...

01 March 2021 2,207 3 View

How does charge on working electrode changes with rising potential?

During performing CV of a GCE or modified GCE, we rise the potential in the first half of the cycle and reduce it in reverse half. During the first half, what is the nature of charge on GCE or...

25 February 2021 7,994 3 View

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25 February 2021 5,713 1 View

How to delaminate copper in water-based anodes?

Hello everyone, I'm looking for a way to delaminate copper current collector of water-based anodes in Li-ion batteries without damaging the graphite film. I tried different materials such as HNO3...

24 February 2021 3,785 3 View

Thermal reduction of graphene oxide.?

I am trying to reduce graphene oxide by thermally but I have no proper information regarding this. Can any one help me regarding the details about temperature and time for the reduction of...

23 February 2021 4,155 4 View

What kind of steel moulds are used for hot pressing metal powders?

My main concern is that the metal powders should not weld to the mold surface and I should easily be able to eject out the pressed samples. I am looking for alternative for graphite moulds. The...

22 February 2021 2,965 4 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

How to Study a proton NMR of Graphene prepared by Electrochemical Exfoliation technique?

I performed a Proton NMR of graphene powder prepared by electrochemical exfoliation technique. It shows some peaks. But I can't understand it.

21 February 2021 8,947 3 View

Which compound is getting oxidized during bulk electrolysis with TFAA?

The experiment is really simple. When I do a bulk electrolysis with 1% TFAA (ACN solution) to get dihydrogen, what is going to be oxidized? (working electrode graphit, counter electrode platinum,...

18 February 2021 4,430 1 View