Suresh Kumar Sharma

21 Questions 65 Answers 0 Followers

Questions related from Suresh Kumar Sharma

In lasers what is the physical process that is responsible for directionality...?

In normal radiation the atomic transitions from higher to lower states are random and the corresponding energy difference is spherically emitted in all the possible directions. In lasers a larger...

04 April 2018 9,620 3 View

Is it possible to fabricate some nanostructure that may absorb the entire solar spectrum...?

Is it possible to create some nanostructure so as to absorb the entire solar spectrum. If not then What are the major challenges in this field...?

03 March 2018 3,601 28 View

What one should have in mind before going through any material characterization technique...?

Although its a very basic question but i think it must be discussed in forum like this, that before we start studying any property like electrical, optical, thermo-mechanical etc. of any sample,...

10 October 2017 1,330 19 View

What should be kept in mine before going through any characterization of materials under study...?

Although its a very basic question but i think it must be discussed in forum like this (ResearchGate) that before we start studying any property like electrical, optical, thermo-mechanical etc. of...

09 September 2017 321 0 View

How hardness is related to the conducting properties of a material.....?

Does anyone have any idea how hardness of a material is related to the conducting properties of a material specifically in the context of Chalcogenides.

10 October 2016 1,626 3 View

How hardness is related to the conducting properties of a material.....?

How the hardness of a material is related to the conducting properties of a material specifically in the context of Chalcogenides?

09 September 2016 802 0 View

What may be the possible reasons why photoconductivity is not observed in Se rich Ag doped Chalcogenides ?

Dear colleagues right these days I'm working on some binary alloys of Se rich Ag doped chalcogenide glasses. In these samples photo current is not observed whereas only 2 % addition of indium...

06 June 2016 6,990 4 View

What is the role of dangling bonds in amorphous semiconductors?

Other than defect states responsible for hoping conduction, what is the role of dangling bonds in amorphous semiconductors specially in the context of chalcogenides?

05 May 2016 392 9 View

How one can interpret the results of SEM(Scanning Electron Microscopy) image in the view of condensed matter physics ?

I have topographical SEM (Scanning Electron Microscopy) images of the surface of a certain sample. The images are shown very rough at the first sight. What inference one can draw with these...

05 May 2016 9,104 17 View

Would we ever be able to measure experimentally the quantity of human emotions having some numerical value?

Is it possible to quantitify the magnitude of human emotions? Like anger, hate, love, affection, sorrow, greedness etc. Would it be possible in near future to prepare a table having a column with...

05 May 2016 1,544 4 View

Why material generally comes out from the walls of the ampoule while quenching it?

While quenching an ampoule containing Se, Ag and Bi in an electric furnace the material comes out of the ampoule from its walls, neither the ampoule gets burst nor the material is coming from the...

04 April 2016 5,205 12 View

Other than defect centers, traps and recombination centres what else parameters must be considered while studying photoconductivity of a material?

I am working on Ag doped chalcogenide glasses. I want to have some expert advice regarding the parameters other than defect states, recombination centers, traps etc which, one must have to...

04 April 2016 2,207 2 View

Is it correct to calculate the average coordination number from empirical relation?

Is the average coordination number obtained by empirical relation is always correct or there are some other means to find it for an alloy? e.g. for an alloy AxByCz the empirical relation used is...

03 March 2016 5,511 13 View

Does anyone knows free fast processing sci journals in material science or in physics, condensed matter physics, solid state physics?

Can anyone suggest me the fast processing free sci journals in material science or in physics with good impact factor?

10 October 2015 972 5 View

Among conductors, Insulators and semiconductors why mostly semiconductors are preferred in electronic devices?

04 April 2015 697 2 View

What is the exact meaning of glass transition temperature?

The term "glass transition temperature" is used in glasses as well as in polymers. Are the reasons of this transition same in the two cases? Do we get this type of transition in all the amorphous...

03 March 2015 5,944 11 View

Is there any empirical relation to find out the band gap of multi-elemental alloys of known composition?

Can one know the band gap of the individual elements?

12 December 2014 2,420 3 View

What happens if equal concentrations (ppm) of n-type and p-type impurities are added to an intrinsic semiconductor ?

As it is almost impossible or it is of least probability that p-type and n-type will interact together.

11 November 2014 2,957 15 View

Power Law in Chalcogenide Amorphous Semiconductors.

Has any research group observed strong decrease in the frequency exponent with increasing temperature, in isothermal frequency dependence of a.c. conductivity....?

01 January 1970 6,082 3 View

Is there any mean of Debye type dielectrics other than single relaxation time?

Other than single relaxation time how Debye type behaviour effects the electrical properties of amorphous semiconductors particularly chalcogenide glasses?

01 January 1970 4,770 2 View

Why number of valence electrons are fractional in number for alloys....?

For alloys or compounds the number of valence electrons are taken as fractional instead of taking it as an integral number, how it is calculated...?

01 January 1970 2,094 4 View