Dinesh Kumar

15 Questions 27 Answers 0 Followers

Questions related from Dinesh Kumar

What does two peaks in the melting peak (from DSC measurement) of a single element single crystal suggest?

During a DSC run of a single element material, its melting peak was found to be split into two (say peak-371 C and peak 2 - 371.8 ). what can be the reason for such distinct splitting of the...

04 April 2019 4,043 5 View

What is your opinion on the recent unpublished work by an Indian group titled 'Evidence for superconductivity at ambient temperature and pressure'?

I have looked at the paper thoroughly seems excellent results but still can't believe it can be possible. Need you opinion.

07 July 2018 774 6 View

What are the different online free software, best for XANES data fitting of carbon based materials?

Is Athena software a good one and reliable one? If yes, why?

09 September 2017 9,417 0 View

What is WHH equation for superconductors?

Hc2 (0)=-0.69Tc (dHc2/dT)Tc In the above equation why does the value 0.69 comes up.

02 February 2016 9,685 4 View

Which systems show decrease superconducting transition temperature with increase in applied pressure?

02 February 2016 9,397 2 View

Can we calculate pinning potential Uo from R-T curves under perpendicular field in low Tc superconductors?

I have seen papers on YBCO and BSCCO or Fe based (Tc ~ 40 K) superconductors. But I hardly see any paper on low temperature bulk superconductors. I have also come across few papers on Low...

01 January 2016 6,717 13 View

Why does a semiconductor when heavily doped become metallic (temperature independent) at very low temperature?

Taken a doped semiconductor at high impurity concentration such that the impurity states are extended in nature, as we lower the temperature, resistivity show weak temperature dependence i.e. very...

08 August 2015 9,586 13 View

Why do we need Reitvel refinement for XRD data analysis?

Why do we need Reitvel refinement only for powder samples? Can it be used for 1.5 micrometer thick polycrystalline film? If it is necessary for thin films, what information can I extract from it?

06 June 2015 8,414 6 View

I need a paper, please download it for me

http://onlinelibrary.wiley.com/doi/10.1002/polb.1993.090310310/abstract

02 February 2015 5,389 1 View

What is the h.c term that comes along with hopping term 't' in the single band Hubbard model (of RVB)?

Please check the attachment, can you please let me know what is the origin of the term 'h.c' in eqn. (4) of the attached paper?

01 January 2015 828 4 View

Are there any precautionary measures I need to take while trying to measure B K edge in 1.5 micron thin film of diamond doped with 4% boron?

I have basically grown a thin film of diamond with boron content at extremely high concentration. I want to study the depth profile of the concentration of boron in the film, I also want to...

01 January 2015 4,914 4 View

How do I convert emu into emu/cm3 in the ZCF and FC plots for superconducting thin films?

(1) I have done some FC and ZFC measurements on my superconducting thin films of area 3 mm x3 mm and thickness 1.5 micron, deposited on Si substrates , what I get from the VSM on the y axis is...

01 January 2015 9,975 4 View

BSCCO is showing resistance at room temperature. How can I correct it?

I have prepared BSCCO pallet, however, the prepared pallet shows resistance at room temperature in Mega ohms can anyone help me know the possibility where I can make the correction? The prepared...

09 September 2014 6,031 15 View

I have a superconducting thin film on Si substrate, can anyone help me with how to carry out MH and MT measurements?

What applied field is required for M-T (FC & ZFC) and can I do M-H measurement from zero to 5 T and how much should the increment of applied field be when I collect the data? Are there any...

07 July 2014 6,419 7 View

How to convert sccm into ppm given that the gas ratios are known?

If 80 sccm of CH4 and 5 sccm of trimethyl boron are passed in 3000 sccm of H2, in CVD; what is the ppm of boron in the diamond film obtained?

01 January 2014 9,347 1 View