Md. Saiduzzaman

7 Questions 12 Answers 0 Followers

Questions related from Md. Saiduzzaman

Anyone kindly tell me that metallic oxide can show negative band gap?

I have examined two compounds band gap having same pyrochlore type structure but one contained carbonate group in the vacant place of pyrochlore structure having negative band gap (-0.22 eV) but...

09 September 2019 4,445 3 View

Why aborption spectrum shows double transation?

Tb contain single phase compound shows double transition. Kindly any one tell me, which will be its band gap? 2.0 eV or 2.7 eV? Thanks in advance.

05 May 2019 7,485 15 View

Are there any Difference between Semimetal and Half-metal?

Semimetal and Half-metal both are same or different? Do they have band gap?

10 October 2018 3,139 7 View

Does absorption depend on particle size of same semiconductor materials?

I have two similar semiconductor materials with particle size 26nm and 69nm. However, 26nm band gap 2.5eV but 69nm is 2.37eV. Does the band gap change due to large particle size?

07 July 2018 3,031 5 View

Similar XRD peaks of two compounds but highest peak intensity in different position, Could both structure are similar or different?

If two XRD patterns Bragg diffraction position are same but the intensity of highest peak position is different then could it be consider as same structure?

05 May 2018 6,744 10 View

XRD peaks of two compounds are similar but highest peak intensity in different position, Could both structure are similar or different?

If two XRD patterns Bragg diffraction position are same but the intensity of highest peak position is different then could it be consider as same structure?

05 May 2018 4,040 9 View

What is the difference in case of Field cooling between two pictures attached?

In the left side picture FC magnetic moment value below zero but in right side it is above zero. Could you kindly tell me what is the reason?In case of superconductor material.

11 November 2017 1,090 2 View