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Atomic and Condensed Matter Forum

Join in expert discussion on atomic and condensed matter. Methods for atoms, molecules, condensed matter. This includes the structure of the atom, its energy states, and its interactions.

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Diffraction Question: 0 in 1st Place on Planes Normal to Beam

Jun 16, 2015 · Replies 16 · Jun 18, 2015

Replies: 16

Views: 2K

What is the difference between monoclinic C and triclinic P lattices?

Jun 14, 2015 · Replies 1 · Jun 17, 2015

Replies: 1

Views: 2K

Can electricity in a superconductor make a magnetic field?

Jun 16, 2015 · Replies 1 · Jun 16, 2015

Replies: 1

Views: 2K

Thomas-Fermi Model: Comparison with Atomic Experiments

Jun 11, 2015 · Replies 2 · Jun 15, 2015

Replies: 2

Views: 2K

Effect of TRS potential on Topological insulator (QSH)

Jun 2, 2015 · Replies 4 · Jun 13, 2015

Replies: 4

Views: 2K

Electron Configuration from Term Symbols in Lanthanides

Jun 9, 2015 · Replies 11 · Jun 13, 2015

Replies: 11

Views: 11K

Math for identifying bosonic atoms

Jun 11, 2015 · Replies 3 · Jun 12, 2015

Replies: 3

Views: 2K

Charge Density Waves: Q1D Metals & Transition Causes

Jun 11, 2015 · Replies 1 · Jun 11, 2015

Replies: 1

Views: 2K

Laser output below, just above and way above threshold?

Jun 9, 2015 · Replies 3 · Jun 10, 2015

Replies: 3

Views: 2K

Thermionic Emission: Questions Explained

Jun 7, 2015 · Replies 6 · Jun 8, 2015

Replies: 6

Views: 3K

Radiative exchange in an ultrafine dust

Jun 7, 2015 · Replies 10 · Jun 8, 2015

Replies: 10

Views: 2K

Schottky junction solar cells

Apr 28, 2015 · Replies 1 · Jun 7, 2015

Replies: 1

Views: 2K

Dipole Polarizabilities of Diatomic Molecules

Jun 6, 2015 · Replies 8 · Jun 7, 2015

Replies: 8

Views: 3K

Second quantisation formula (electron-phonon coupling)

Jun 6, 2015 · Replies 2 · Jun 7, 2015

Replies: 2

Views: 1K

Discover the Fascinating World of Smart Materials Engineering

Jun 6, 2015 · Replies 1 · Jun 6, 2015

Replies: 1

Views: 1K

Why Isn't a Lone Proton Considered a Magnetic Monopole?

Jun 6, 2015 · Replies 4 · Jun 6, 2015

Replies: 4

Views: 1K

Simple atomic unit conversion check

Jun 3, 2015 · Replies 2 · Jun 4, 2015

Replies: 2

Views: 2K

Calculate Si cohesive energy using VASP

Jan 24, 2015 · Replies 1 · Jun 3, 2015

Replies: 1

Views: 8K

Electronic Transition of Atoms

Jun 3, 2015 · Replies 2 · Jun 3, 2015

Replies: 2

Views: 1K

Why is the volume of FCC and BCC different in reciprocal space?

Jun 2, 2015 · Replies 1 · Jun 2, 2015

Replies: 1

Views: 31K

Why do holes not contribute to conduction in metals?

May 16, 2015 · Replies 13 · May 30, 2015

Replies: 13

Views: 13K

Difference between Superconductivity & Ballistic Conduction

May 29, 2015 · Replies 1 · May 30, 2015

Replies: 1

Views: 5K

Green's function and density of states

May 29, 2015 · Replies 1 · May 29, 2015

Replies: 1

Views: 3K

Number of phonon modes possible

May 28, 2015 · Replies 5 · May 29, 2015

Replies: 5

Views: 8K

Optical phonons in fcc-lattice

May 26, 2015 · Replies 8 · May 28, 2015

Replies: 8

Views: 4K

Periodic Boundary Conditions proof

May 28, 2015 · Replies 8 · May 28, 2015

Replies: 8

Views: 3K

IR Spectoscopy - Photon Energies

May 27, 2015 · Replies 1 · May 28, 2015

Replies: 1

Views: 2K

Effective mass, Taylor's theorem

May 26, 2015 · Replies 12 · May 27, 2015

Replies: 12

Views: 2K

Dispersion relation for diatomic linear chain.

May 25, 2015 · Replies 10 · May 27, 2015

Replies: 10

Views: 10K

Why is there reflection in 222 plane of Silicon?

May 20, 2015 · Replies 3 · May 27, 2015

Replies: 3

Views: 2K

What makes the change of sign in Hall?

Apr 26, 2015 · Replies 7 · May 26, 2015

Replies: 7

Views: 11K

Electron-hole gas density in different materials

May 17, 2015 · Replies 4 · May 25, 2015

Replies: 4

Views: 1K

Interaction mechanisms of photons and electrons with matter

May 19, 2015 · Replies 14 · May 25, 2015

Replies: 14

Views: 3K

Atoms as spheres in packing fraction of crystal lattice

May 23, 2015 · Replies 4 · May 25, 2015

Replies: 4

Views: 2K

How Do Quantum Numbers Relate to Electron Count in Quantum Dots?

May 8, 2015 · Replies 3 · May 24, 2015

Replies: 3

Views: 2K

Understanding the Debye Model for Solids: Masses and Springs

May 23, 2015 · Replies 5 · May 24, 2015

Replies: 5

Views: 3K

Non-Joulian Magnets: Why Do They Expand?

May 22, 2015 · Replies 2 · May 23, 2015

Replies: 2

Views: 2K

What is the Atomic Mass of Deuterium According to Parthey's Measurements?

May 11, 2015 · Replies 5 · May 23, 2015

Replies: 5

Views: 3K

What is the difference between a vacancy and a defect in a solid solution?

Oct 10, 2013 · Replies 4 · May 21, 2015

Replies: 4

Views: 2K

Wave packet description of electrons in solid state physics

May 21, 2015 · Replies 1 · May 21, 2015

Replies: 1

Views: 2K

Where does band index come from in block wave functions?

May 20, 2015 · Replies 1 · May 21, 2015

Replies: 1

Views: 1K

Intrinsic Carrier Concentration for Carbon

Feb 22, 2008 · Replies 1 · May 20, 2015

Replies: 1

Views: 6K

Discontinuous at horizontal axis, U and K points, in energy

May 20, 2015 · Replies 1 · May 20, 2015

Replies: 1

Views: 1K

What is the role of degeneracies in the condition for optical gain?

May 17, 2015 · Replies 2 · May 18, 2015

Replies: 2

Views: 2K

Electrostatic Force Between Proton and Neutron?

May 17, 2015 · Replies 1 · May 17, 2015

Replies: 1

Views: 4K

Absorption in Indirect Bandgaps

Apr 29, 2015 · Replies 12 · May 17, 2015

Replies: 12

Views: 3K

High and low energy photon absorption

May 9, 2015 · Replies 2 · May 17, 2015

Replies: 2

Views: 1K

Wide bandgap semiconductor -- why higher temperature tolerance?

May 15, 2015 · Replies 3 · May 16, 2015

Replies: 3

Views: 3K

Why is the conversion from eV to Kelvin so high?

May 15, 2015 · Replies 4 · May 15, 2015

Replies: 4

Views: 2K

Lattice points and lattice basis

May 15, 2015 · Replies 1 · May 15, 2015

Replies: 1

Views: 2K

How does measurement time affect laser linewidth measurements?

May 7, 2015 · Replies 2 · May 15, 2015

Replies: 2

Views: 3K

Why does corrected Maxwell Boltzmann have decimals?

May 14, 2015 · Replies 2 · May 15, 2015

Replies: 2

Views: 2K

Holstein Primakoff representation

May 14, 2015 · Replies 1 · May 14, 2015

Replies: 1

Views: 2K

YBCO Phonon Frequency: Hole Doping .2, 75-70°K @ 70°K

May 5, 2015 · Replies 1 · May 11, 2015

Replies: 1

Views: 2K

How can I derive the path integral using the Baker-Campbell-Hausdorff formula?

May 11, 2015 · Replies 1 · May 11, 2015

Replies: 1

Views: 2K

Understanding Crystal Symmetries & Dielectrics

May 9, 2015 · Replies 3 · May 11, 2015

Replies: 3

Views: 2K

List of Photon-Matter Interactions

May 8, 2015 · Replies 1 · May 9, 2015

Replies: 1

Views: 2K

Quantum Hall Effect resistivity

Apr 28, 2015 · Replies 3 · May 8, 2015

Replies: 3

Views: 3K

Definition of open boundary conditions

Apr 29, 2015 · Replies 3 · May 7, 2015

Replies: 3

Views: 13K

Is it possible to get just one photon from just one atom?

May 6, 2015 · Replies 9 · May 7, 2015

Replies: 9

Views: 2K

Is it possible to label the Debye temperature on a graph of

May 4, 2015 · Replies 4 · May 7, 2015

Replies: 4

Views: 3K

Building a Non-Ideal HCP Lattice in MD Simulation

Apr 29, 2015 · Replies 1 · May 5, 2015

Replies: 1

Views: 2K

Allowed/Forbidden Transition Dipole Moments

Apr 30, 2015 · Replies 5 · May 3, 2015

Replies: 5

Views: 4K

Transition dipole -- Line shape function

May 2, 2015 · Replies 1 · May 3, 2015

Replies: 1

Views: 2K

How can an ultrashort pulse be detected?

May 2, 2015 · Replies 3 · May 3, 2015

Replies: 3

Views: 2K

Trying to relate nuclear physics to solid state (fermi gas)

May 2, 2015 · Replies 6 · May 2, 2015

Replies: 6

Views: 2K

Change of sign on Green's functions (Maths problem)

Apr 30, 2015 · Replies 1 · May 1, 2015

Replies: 1

Views: 1K

Why Does Feynman Use a Single Electron Charge for Dipole Calculations?

Apr 27, 2015 · Replies 7 · Apr 30, 2015

Replies: 7

Views: 2K

What does this length represent?

Apr 21, 2015 · Replies 7 · Apr 30, 2015

Replies: 7

Views: 3K

Auger electrons vs secondary electrons

Apr 22, 2015 · Replies 24 · Apr 30, 2015

Replies: 24

Views: 13K

Magnetic Dipole less than that of the Bohr Magneton

Apr 28, 2015 · Replies 2 · Apr 30, 2015

Replies: 2

Views: 2K

Stern-Gerlach experiment with electric field

Apr 25, 2015 · Replies 2 · Apr 30, 2015

Replies: 2

Views: 2K

Does the Bragg equation hold for arbitrary diffractions?

Apr 28, 2015 · Replies 3 · Apr 29, 2015

Replies: 3

Views: 1K

Complex Geometric Theories and Molecules

Apr 24, 2015 · Replies 15 · Apr 28, 2015

Replies: 15

Views: 2K

A question for helium energy transition

Apr 27, 2015 · Replies 4 · Apr 27, 2015

Replies: 4

Views: 4K

Why Does Feynman Use a Single Electron Charge in Dipole Calculations?

Apr 26, 2015 · Replies 1 · Apr 27, 2015

Replies: 1

Views: 1K

Why Cannot I Factorize the Partition Function?

Apr 25, 2015 · Replies 4 · Apr 25, 2015

Replies: 4

Views: 2K

Degrees of freedom of diatomic gas

Apr 23, 2015 · Replies 6 · Apr 24, 2015

Replies: 6

Views: 9K

Tight binding dispersion for graphene

Apr 18, 2015 · Replies 1 · Apr 23, 2015

Replies: 1

Views: 2K

How does annealing improves the ohmic contact?

Apr 16, 2015 · Replies 6 · Apr 21, 2015

Replies: 6

Views: 3K

Electrons in Metal: Wave-Particle Duality

Apr 19, 2015 · Replies 8 · Apr 20, 2015

Replies: 8

Views: 2K

The structure of carbon graphite

Apr 20, 2015 · Replies 1 · Apr 20, 2015

Replies: 1

Views: 1K

Understanding FWHM in XRD Analysis of Powder Patterns

Apr 14, 2015 · Replies 3 · Apr 20, 2015

Replies: 3

Views: 4K

Measurement of Hydrogen 1s 4s transition frequency

Apr 16, 2015 · Replies 9 · Apr 20, 2015

Replies: 9

Views: 3K

What is the meaning of a fully occupied state in the Fermi-Dirac distribution?

Apr 18, 2015 · Replies 2 · Apr 18, 2015

Replies: 2

Views: 2K

Field effect transistors question

Mar 20, 2015 · Replies 6 · Apr 17, 2015

Replies: 6

Views: 2K

Dispersion relation for the free electron model

Apr 15, 2015 · Replies 1 · Apr 16, 2015

Replies: 1

Views: 9K

Which plane of GaN gives an image of dots placed hexagonally

Mar 27, 2015 · Replies 5 · Apr 15, 2015

Replies: 5

Views: 2K

Comparing the Energy Levels of Diatomic Molecules

Apr 14, 2015 · Replies 4 · Apr 15, 2015

Replies: 4

Views: 2K

Transition dipole moment of diatomic molecules

Apr 11, 2015 · Replies 2 · Apr 13, 2015

Replies: 2

Views: 3K

Question from Ashcroft/Mermin: electronic density eqn

Apr 13, 2015 · Replies 2 · Apr 13, 2015

Replies: 2

Views: 1K

Precision measurements of atomic mass.

Apr 11, 2015 · Replies 5 · Apr 13, 2015

Replies: 5

Views: 2K

Interband transition no photon

Apr 11, 2015 · Replies 10 · Apr 13, 2015

Replies: 10

Views: 3K

What Is Gain Narrowing in Lasers?

Apr 10, 2015 · Replies 3 · Apr 12, 2015

Replies: 3

Views: 5K

What is the physical meaning of the Thomas-Fermi vector?

Apr 6, 2015 · Replies 2 · Apr 12, 2015

Replies: 2

Views: 6K

Fermi Surface squashed by potentials

Apr 1, 2015 · Replies 6 · Apr 11, 2015

Replies: 6

Views: 2K

Exponentially damped dipole - line broadening

Apr 9, 2015 · Replies 3 · Apr 10, 2015

Replies: 3

Views: 2K

Density of states, photonic crystal

Apr 7, 2015 · Replies 10 · Apr 10, 2015

Replies: 10

Views: 4K

Problem about electronic structure

Apr 3, 2015 · Replies 1 · Apr 10, 2015

Replies: 1

Views: 2K

What do you mean by Cooper pair in real space and k space?

Apr 7, 2015 · Replies 1 · Apr 8, 2015

Replies: 1

Views: 2K

Atomic and Condensed Matter

Welcome to the Atomic Physics forum!

Atomic and condensed matter physics are two closely related branches of physics. Atomic physics focuses on the study of atoms, investigating their structure, behavior, and interactions with electromagnetic radiation.

It delves into phenomena such as atomic spectra, quantum states, and atomic transitions. Condensed matter physics, on the other hand, extends these principles to study the properties and behaviors of solid and liquid matter in bulk, dealing with materials like metals, semiconductors, and liquids.

This field explores concepts such as phase transitions, crystal structures, and electronic properties of condensed phases. Both atomic and condensed matter physics contribute significantly to our understanding of the fundamental properties of matter and find applications in various technological advancements and material science.

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