Solid State Physics

Theory and applications of solid-state physics. | Review and cite the most recent SOLID STATE PHYSICS protocol, troubleshooting and other methodology information | Contact experts in SOLID STATE PHYSICS to get answers

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Questions related to Solid State Physics

Why it is required to optimize a unit cell generated from cif lattice parameters and atomic coordinates during ab initio solid state calculations?

A cif file represents a unit cell with minimum energy. My question is, in the start of any ab initio calculation for unit cell generated from the cif file, why we are advised to optimize cell...

20 January 2021 10,117 3 View

ZnO and PBABr synthesis?

Hello all, I want to synthesize ZnO nanoparticles and PBABr in my lab for my LED project. I know the method, but I am not sure how can I check(even visually) that I have arrived at the correct...

28 September 2020 5,588 7 View

Have Quantum Cascade Lasers been used to excite phonons (e.g. in solid-state samples)?

I am aware of many femtosecond laser based approaches to excite phonon modes e.g. in crystals and minerals. Quantum Cascade Lasers (QCLs) seem like an interesting alternative, especially since...

28 May 2020 5,667 3 View

How to study the crystal structure of nano ferromagnetic materials? How to arrive at a suitable doping agent?

What are the books/articles to study the crystal structure of nanoferromagnetic materials?

01 April 2020 4,396 4 View

Tips and tricks to improve PL signal of a low-yield sample in FTIR spectroscopy?

Hi, I am working on donor spectroscopy in Si. Due to low donor concentration around 10^16 cm-3, the PL signal I get by exciting 670 nm pump is very low, below noise floor. The system is locked-in...

26 March 2020 3,808 4 View

Why do some organic radicals have quenched photo-luminescence?

I have seen a number of publications state that organic radicals often exhibit quenched photo-luminescence, yet offer no explanation as to why. Can someone offer a physical explanation as to why...

17 February 2020 787 2 View

Multiphysics simulation of low temperature plasma, what is the best approach?

Any thoughts on the best approach or framework to adopt here? also what is the best computational environment to use for this modelling task, ANSYS or COMSOL?

18 December 2019 3,254 3 View

What is "degeneracy of the band extrema near the Fermi level" in a semiconductor material?

It is generally perceived that for a better thermoelectric material degeneracy of band-extrema near Fermi level is one of many criteria, since it directly influences the figure of merit (ZT). And...

11 August 2019 4,260 4 View

Eccentric Carrier Concentration Profiles in an abrupt p-n junction : How to remove that anomaly?

Hi There, I am doing a simulation in COMSOL to find the carrier concentrations in an abrupt p-n junction. The donor and acceptor concentrations are (Nd=3*10^26, Na=10^24) respectively....

24 July 2019 7,974 1 View

How can we increase energy band gap?

In solid-state physics, a band gap/energy gap is an energy range in a solid where no electron states can exist. In graphs of the electronic band structure of solids, the band gap generally refers...

13 July 2019 6,700 7 View

Whether "lattice parameter" and "lattice constant" are refering to same constants like a,b,c in crystals?

In crystal structures, the lattice constants are defined as "a", "b" and "c". In few literature(s), the "lattice parameter" is used. Are they same?. Is there any difference?.

28 January 2019 7,287 4 View

Hall effect: what is the electric conductivity tensor for AC magnetic field and DC electric field?

solid-state-physics I need to define electrical conductivity anisotropic tensor in a metal caused by Hall effect. My problem is that i don't know how to define it in case of oscillating magnetic...

20 January 2019 6,388 4 View

Work function of 0-D and 3-D using density functional theory?

how can we calculate the work function of 0-D (quantum dot or nanocrystal or molecules) and 3-D (bulk) materials using density functional theory?

15 January 2019 2,637 3 View

When using the Debye model to calculate heat capacity within a solid, you calculate it at constant volume.How to take into account thermal expansion?

If you're calculating at constant volume how do you take into account the effects of thermal expansion on the heat capacity? If there's thermal expansion and you hold it at a fixed volume,...

28 November 2018 7,221 6 View

Density of states for 3D/2D perovskites?

Do we have a number for DOS (Nv, Nc) for 3D or 2D perovskites? Although I see few papers reporting DOS, I do not find a number. Or maybe I do not find a way to calculate DOS from the plots.

26 July 2018 8,780 3 View

What are the techniques to measure band structures?

What are the technique which can measure band strucutre at symmetry point and can distinguish the type of band for example s or p type?

11 November 2017 8,850 2 View

Determine the exchange stiffness from magnetisation data

The ferromagnetic exchange stiffness constant A is one of the most important parameters in micromagnetics. I know it can be measured in FMR experiments but is it possible to determine it from...

17 August 2017 5,182 2 View

Is it possible to exceed the mean occupation number ( number of photons per mode) of black-body radiation?

Boltzmann distribution determines the expected occupancy of the modes in thermal equilibrium. Are there any passive ways of increasing the occupancy number?

26 July 2017 2,998 3 View

How does temperature influence reflectivity and absorption?

Dear All, I am wondering if someone can explain that why reflectivity decreases and absorption increases with increasing temperature in METALS. This is not my field of study so my knowledge about...

26 July 2017 2,448 8 View

Heat flow changes from +ve to -ve value with doping in Differential Scanning calorimetry Analysis?

In DSC plots for chalcogenide glasses, the heat flow has positive value and increases with temperature. With heavy doping of foreign atom in chalcogenide glasses, the plots shows negative values...

22 July 2017 3,777 2 View

How to calculate the effective density of states from band structure?

Can someone tell me how they calculate Nv of InAsN? Thanks, Houcine.

22 July 2017 2,272 1 View

Nano-structuring Phosphorene?

I have been looking into how to maximize the thermoelectric performance of phosphorene through nanostructuring. The mean free path of charge carriers (both e- and h+) is >10nm whereas phonons...

18 July 2017 8,166 1 View

Band ordering in VASP

Hello guys I am performing DFT calculations of some defect complexes in a large diamond supercell using HSE06 approach implemented in VASP. The 1-st BZ is sampled with gamma point only and...

06 July 2017 8,247 3 View

How to interpret DOS graphs from DFT calculations?

Hi, I have some specific questions regarding the interpretation of DOS plots from DFT softwares (e.g. VASP). 1. What does it mean when the peaks broadened after material alterations (e.g. addition...

04 July 2017 7,676 6 View

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