Skip to main content

Questions tagged [solid-state-physics]

Solid-state physics studies how macroscopic properties of solids (mechanical, electrical, optical, etc.) result from their microscopic structure. It usually deals with the scale where quantum properties of the particles are substantial.

Filter by
Sorted by
Tagged with
1 vote
0 answers
5 views

Is it possible to have a system that show superconducting behavior in magnetization and insulating behavior in resistivity?

Is it possible to have a system that show superconducting behavior in magnetization measurements and insulating behavior in resistivity measurements? if yes then please provide some references?
Rick Andy's user avatar
  • 155
1 vote
0 answers
27 views

Where can I read about excitons?

I'm having a tough time finding a good reference for excitons. I know next to nothing about them, and I'd like to find a good book/paper/notes that would introduce it in a slow, pedagogical way. ...
0 votes
0 answers
28 views

What items could cause a spark inside a hyperbaric chamber? [closed]

As per title. For example: could clothing containing a minor percentage (40% or less) of Polyester, Elastan or similar materials, cause a spark? could reading material being marked with a pencil, ...
Cris's user avatar
  • 101
0 votes
0 answers
18 views

Reciprocal lattice for non-bravais lattices

In crystallography, when dealing with a lattice that is not a Bravais lattice, from my understanding, we sometimes chose a bravais lattice and consider the "misbehaving" atoms as "...
Lucas's user avatar
  • 79
-1 votes
0 answers
48 views

Voltage and electrochemical energy in Galvanic cells [closed]

In a Galvanic cell composed of two metallic leads Cu and Zn, is the generated voltage the difference between Fermi energy (chemical potential) of Zn and Cu as $ \Delta V=\mu_{Zn} - \mu_{Cu} $? I think ...
H. Khani's user avatar
  • 179
2 votes
0 answers
48 views

Variables dependency after unitary transformation [closed]

Currently working on tight-binding model with external field that induced an extra phase factor, e.g. Peierls phase $e^{i\frac{q}{\hbar}{\int_{\vec{r}_j}^{\vec{r}_i}}\vec{A}\cdot d\vec{r}}$ which will ...
まこと's user avatar
0 votes
0 answers
17 views

How many distinct phonon branches will I see for 3 atoms in the unit cell, along the [100] direction?

Silicon (Si) crystallises in the fcc cubic structure with two atoms in the primitive unit cell. How many acoustic and optical phonon branches does it have? How many distinct branches in the ...
Despaxir's user avatar
0 votes
1 answer
24 views

How do you determine the basis of a crystal structure? [closed]

Consider this Cuprite unit cell like in the picture. I am first thinking that this is a body centered cubic cell, with the atom in the center and the surrounding copper atoms as the basis, hence five ...
Vro's user avatar
  • 1
1 vote
0 answers
34 views

Elasticity theory: homogeneous deformations of a perfect lattice

I want to understand how the macroscopic (linear) elasticity theory emerges from the microscopic properties of matter. My question is about the model of the "perfect lattice", which is used ...
Plemath's user avatar
  • 186
1 vote
0 answers
24 views

Help with Parametrizing Path Through High-Symmetry Points in 2D Hexagonal Brillouin Zone

I'm currently working on a project involving the calculation of band structures for a 2D hexagonal lattice, and I need some guidance on how to properly parametrize a path that covers the high-symmetry ...
Felipe Cubillos Pérez's user avatar
1 vote
1 answer
45 views

Intrinsic band gap vs work function of doped semiconductors

I'm confused about this question on doped semiconductors: Question: Photoelectrons with a maximum energy of $\ 0.5$ eV are observed when light of wavelength $500$ nm is incident on a heavily n-doped ...
user374355's user avatar
0 votes
1 answer
78 views

Where is the orthogonality center of the AKLT ground state matrix product state?

It is a known fact that the ground state of the 1D Affleck-Kennedy-Lieb-Tasaki model (AKLT) can be represented as a matrix product state (MPS) of the following form: $$ \left|{\psi}\right\rangle = \...
Yoav Zack's user avatar
  • 167
0 votes
2 answers
27 views

'Polarization' of waves in crystal lattice

The vibrations in crystal are modelled as sound waves in debye model of specific heat. The density of states function for these vibrational modes is multiplied by 3 because of allegedly 3 '...
Mr. Wayne's user avatar
  • 353
1 vote
1 answer
45 views

Question about electrons in tight binding model?

I was wondering, in the 1D tight-binding derivation, is the expansion of the ket: $$|\Psi\rangle=\sum_n\phi_n|n\rangle,$$ a superposition of all the electrons or only one thus $|n\rangle$ only ...
Lucas's user avatar
  • 79
1 vote
2 answers
87 views

Why does the magnetic field penetrate inside the superconductor?

why does the magnetic field penetrate (that is exponentially decaying over the thin region) inside the superconductor? Does it actually contradicts Meissner effect?
Rick Andy's user avatar
  • 155
0 votes
0 answers
17 views

Why there is a difference in the volume fraction of a superconductor when you do measurement in Field Cooled (FC) and Zero Field Cooled (ZFC) mode?

Why there is a difference in the volume fraction of a superconductor when you do Field Cooled and Zero field cooled? What does that difference indicate?
Rick Andy's user avatar
  • 155
0 votes
1 answer
58 views

Why the resistance in superconductors is zero? [duplicate]

Why the resistance in superconductors is zero? I know the BCS cooper pair formation but why in principle it behaves like that?
Rick Andy's user avatar
  • 155
1 vote
0 answers
40 views

What physical properties give rise to abelian anyons as opposed to non-abelian anyons?

As far as I understand, abelian anyons are those which have a particle exchange operator which is a one-dimensional representation of the braid group. Non-abelian anyons, then, have a higher-...
Lucas's user avatar
  • 11
1 vote
0 answers
38 views

How do I find the eigenstates of the dispersion in a diatomic linear chain with two different spring constants?

This is my first post. I've got a problem with finding the eigenstates of the diatomic linear chain. Let me show you guys what I already did. The equations of motion are: $$ M_1\ddot u_n^1=-C_1(u_n^1-...
calotas's user avatar
  • 11
0 votes
1 answer
29 views

Current Inside the Depletion Region Forward Biased PN Junction

For a forward biased PN junction, we assume the hole and electron currents are constant inside the depletion region when there is no generation or recombination in the depletion region (shown from the ...
Abe 's user avatar
  • 63
0 votes
1 answer
32 views

How can charge neutrality be maintained for a forward-biased PN junction?

When a PN junction is forward biased, majority electons diffuse into p region and majority holes diffuse into n region, if we impose quasi-neutrality, then we have that in the p and n regiosn the ...
Marcus Hany's user avatar
0 votes
1 answer
33 views

Built-In Potential (Forward vs Thermal Equilibruim)

According to my book the built-in potential $V_{bi}$ for a PN junction under thermal equiliubrium is: $$V_{bi}= \frac{KT}{q}In(\frac{n_{no}p_{po}}{{n_{i}}^2})$$ where $n_{no}$ and $p_{po}$ are the ...
Abe 's user avatar
  • 63
0 votes
1 answer
35 views

Electric Field Far From PN Junction

According to Semiconductor physics and devices Book by Donald A. Neamen book. The electric field far from the space charge region is very small and most of the applied voltage happens across the space ...
Abe 's user avatar
  • 63
1 vote
0 answers
18 views

Why are zero-modes preserved on turning on coupling in twisted bilayer graphene model?

In the paper https://arxiv.org/abs/1808.05250 on page 3, they talk about how when the parameter $\alpha$ in the Hamiltonian in Eq. (5) equals $0$, we get zero modes at the Dirac points K and K’. This ...
mp62442's user avatar
  • 59
0 votes
0 answers
52 views

Why there is steady DC current in a metal under static $E$ field in the presence of Bloch oscillation?

Background: This is a question regarding the Bloch oscillation and the solid state description of shifted Fermi sphere under static electric field. Question: One explanation for a steady current ...
physstudent11's user avatar
0 votes
0 answers
45 views

Current due to Ambipolar transport of excess carrier in semiconductors

I am reading Neaman's textbook and I am confused by the ambipolar transport phenomenon. According to what I have understood, if excess carriers are injected somehow into a doped semiconductor piece, ...
Marcus Hany's user avatar
0 votes
0 answers
21 views

What parameters of a material must i know to deduce its internal electromagnetic field?

In continuum physics, it is assumed that an open region in space $\Omega$ that contains a given substance has the standard topology in $\mathbb{R}^3$, is isotropic and is homogeneous everywhere... But ...
Simón Flavio Ibañez's user avatar
10 votes
3 answers
5k views

How much pressure would it take to compress a block of solid steel into one-tenth the original volume?

We all know to compress objects into smaller volumes, you would need to apply pressure to them. The required pressure depends on how strong the material is and which form is it (gas, liquid, solid). I ...
ZanMoon-chan's user avatar
0 votes
0 answers
25 views

Please suggest a good book on Material Sciences and Thin Films

I am a fourth semester student of a Bachelor's Degree in Physics. The only graduate level book that I have read on Solid State Physics is An Introduction To Solid State Physics by Charles Kittel But ...
0 votes
0 answers
29 views

Understand Laue condition intuitively

I understand that it is the necessary condition in elastic scattering for scattering to happen, and for the wave to stay coherent, thus it stays able to interfere with other diffracted rays. But I ...
Lucas's user avatar
  • 79
2 votes
2 answers
75 views

How could free electrons flow in a conductor? If electrons actually flow in a conductor, then won't the atoms of the conductor become unstable?

I've read in many physics books that electrons flow due to a potential difference across a conductor, and that the flow of electrons is opposite to the current direction. But, if electrons move from ...
Doodieman360's user avatar
1 vote
1 answer
80 views

Why are there triclinic and monoclinic lattices, but biclinic is never mentioned?

When classifying the Bravais lattices we have the triclinic (point group ${\rm C_i}$) and the monoclinic $({\rm C_{2h}})$ cases, but we do not see the "biclinic" case listed. Why not? It ...
Jos Bergervoet's user avatar
0 votes
0 answers
30 views

Why is Wigner-Seitz cell considered primitive?

During the lecture I listened, as well as in the internet, in Wikipedia for example, unit cell was defined as the parallelepiped spanned by the translation vectors. Primitive cell was defined as the ...
Максим Неважно's user avatar
0 votes
1 answer
25 views

Differential magnetic susceptibility v.s. magnetic susceptibility?

For a given material which has the M-H curve looks like the following figure: When I extract the magnetic susceptibility of the material, should I use the ratio between M and H, $\chi_m=\frac{M}{H}$, ...
physstudent11's user avatar
1 vote
0 answers
44 views

About Periodically Repeated Dirac Delta Potential

In the first few pages the book Solid State Physics by Giuseppe Grosso presents the equation relating the energy of a periodically repeated barrier with a barrier starting at $x=-\omega$ and ending at ...
Gean Araujo's user avatar
1 vote
0 answers
22 views

Einsteins Coefficient of Absorption in solid state

What solid state parameter determines the probability of absorption (Einsteins coefficient B) in a material? Is it material dependent? I think, I cannot say bandgap. Because if I have a source having ...
walber97's user avatar
  • 1,338
1 vote
1 answer
117 views

Confusion about the LCAO or tight binding model (nearest neighbors)

I'm using the book "Atomic and Electronic Structure of Solids" by Kaxiras. In chapter 4, the author introduces the tight binding or LCAO model for calculating electronic band structures. He ...
agaminon's user avatar
  • 1,567
0 votes
2 answers
64 views

Is refraction a special case of diffraction according to the book by Charles Kittel?

Wikipedia defines diffraction as - Diffraction is the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/...
Vatsal Sharma's user avatar
1 vote
0 answers
33 views

NaCl melting temperature is low if you consider cohesive its energy

NaCl melting temperature is 1074k. NaCl cohesive energy is 7.9eV. Carbon melting temperature is 3915k. Carbon cohesive energy is 7.4eV. As you can see NaCl melting temperature is lower than the carbon ...
SimoBartz's user avatar
  • 1,799
1 vote
1 answer
60 views

Carrier Recombination Lifetime in Thermal Equilibrium

All the books I read talk about carrier recombination lifetime when the semiconductor material is pushed out of equilibrium. But let's say the material is in equilibrium ( where generation and ...
Abe 's user avatar
  • 63
0 votes
0 answers
25 views

Is the difference between cubic and hexagonal diamond structure in 2 dimensions or 3 dimensions?

I was reading the book Solid State Physics by Charles Kittel. It was explained that the difference between Cubic F or FCC and the Hexagonal Closed Packed structure or the HCP was as follows - (Please ...
Vatsal Sharma's user avatar
1 vote
1 answer
49 views

Why is the band diagram of metals similar to that of an empty lattice?

The electrons at the bottom of a band diagram correspond to some of the most tightly bound electrons. Why is it the case that the bottom of the band structure of sodium, for instance, can be well ...
Bruno Nowak's user avatar
0 votes
0 answers
32 views

How to determine the effective mass for multivariate dispersion relation? [duplicate]

Consider the 1D dispersion obtained by the tight-binding method: $ E(k)=\epsilon_0-t\cos(ka) $ $\epsilon_0$ is the on-site energy and $t$ is the hopping energy. To find the effective mass, you can ...
Anthony K.'s user avatar
0 votes
1 answer
47 views

Why is the first Brillouin zone size of a body center cubic is 4π/a?

According to many online sources that the first Brillouin zone of a body center cubic (bcc) has the shape illustrated below. Along the $k_x$ (or $k_y$, $k_z$, $(100)$...) direction, basically the $\...
physstudent11's user avatar
0 votes
1 answer
63 views

Is the drift current of minority carriers negligible in the continuity equation?

When deriving the ambipolar transport equations for an extrinsic semiconductor under low injection, I have found certain discrepances between different references. For instance, in Neamen's ...
tsch_'s user avatar
  • 25
1 vote
1 answer
53 views

Tight binding of monoatomic chain

For the the 1D atomic chain tight binding calculation, if we choose 1 atom per unit cell, the band dispersion is simply: $\epsilon-2t\cos{(ka)}$. However, if we redefine our unit cell as 2 atoms, 3 ...
physstudent11's user avatar
0 votes
0 answers
30 views

Using the Bloch Ansatz in the Stationary Schrödinger Equation to Derive Dynamical Diffraction Intensity Equations

I am working on deriving the intensity equations for the dynamical diffraction of neutrons following along with a paper by Hartmut Lemmel (Hartmut Lemmel. Dynamical diffraction of neutrons and ...
pyguy83's user avatar
0 votes
1 answer
27 views

Derivation in a Landau-Lifshitz ferromagnetism paper

I was reading the following paper by Landau and Lifshitz on ferromagnetism: https://www.sciencedirect.com/science/article/abs/pii/B9780080363646500089 In the paper, the following expression is used ...
Andreas Christophilopoulos's user avatar
-3 votes
1 answer
55 views

Meaning of wavevector in SSH model

If we solve the hamiltonian of the following form in the SSH model, You will get an eigen vector of the following form. I am having difficulty interpreting this eigen vector. According to this eigen ...
hhhbbb's user avatar
  • 1
2 votes
0 answers
25 views

The interpretation of the Bose occupation factor

I was reading into the Oxford solid state basics, by Steven H.Simon and I stumbled upon a confusing interpretation of the Bose Occupation factor: $$n_B (x) = \frac{1}{e^x-1}$$ with: $$x = \beta \hbar \...
SAMS's user avatar
  • 41

1
2 3 4 5
71