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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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B Collapse of a neutron star - strong nuclear force vs gravity

Jan 17, 2021 · Replies 5 · Jan 19, 2021

Replies: 5

Views: 2K

I Graphene - Armchair vs Zigzag - Semiconductor?

Jan 17, 2021 · Replies 1 · Jan 17, 2021

Replies: 1

Views: 2K

B Viewing IR radiation with cell phone cameras

Jan 16, 2021 · Replies 4 · Jan 17, 2021

Replies: 4

Views: 3K

Problems with Landau Wang algorithm in fortran

Dec 16, 2020 · Replies 8 · Jan 16, 2021

Replies: 8

Views: 2K

I How do two photons affect Rabi oscillations in a 2-level atomic system?

Jan 12, 2021 · Replies 4 · Jan 13, 2021

Replies: 4

Views: 3K

I Do electron orbitals ever change?

Jan 11, 2021 · Replies 13 · Jan 12, 2021

Replies: 13

Views: 2K

I Spin orbit coupling/Filling order/Nucleus

Jan 6, 2021 · Replies 5 · Jan 10, 2021

Replies: 5

Views: 2K

B Question about final k.e. of alpha and Polonium after decay of Radon

Jan 9, 2021 · Replies 2 · Jan 9, 2021

Replies: 2

Views: 2K

A Enthalpy of Evaporation at Zero Kelvin | Understanding Enthelpy Basics

Jan 7, 2021 · Replies 1 · Jan 8, 2021

Replies: 1

Views: 1K

I Confused about Ramsey interferometry

Dec 31, 2020 · Replies 9 · Jan 5, 2021

Replies: 9

Views: 4K

B Are Subatomic particles a form of matter?

Jan 3, 2021 · Replies 5 · Jan 3, 2021

Replies: 5

Views: 1K

A Crystallographic representation of a material, two sources seem very d

Jan 3, 2021 · Replies 2 · Jan 3, 2021

Replies: 2

Views: 1K

I Van Laue Formulation: X-ray Diffraction from Crystal Structure

Dec 31, 2020 · Replies 1 · Jan 2, 2021

Replies: 1

Views: 2K

B Volume of a solid at absolute zero

Dec 30, 2020 · Replies 11 · Dec 31, 2020

Replies: 11

Views: 2K

I The wave vector in 1st B.Z in Bloch theory

Dec 26, 2020 · Replies 3 · Dec 28, 2020

Replies: 3

Views: 2K

B Are energy bands in solid state timeless?

Dec 18, 2020 · Replies 10 · Dec 27, 2020

Replies: 10

Views: 2K

I Bands in strongly correlated materials

Nov 7, 2020 · Replies 3 · Dec 25, 2020

Replies: 3

Views: 2K

B Why one substance does not pass through another substance？

Dec 16, 2020 · Replies 5 · Dec 24, 2020

Replies: 5

Views: 2K

I Semiclassical model of electron dynamics

Dec 18, 2020 · Replies 6 · Dec 22, 2020

Replies: 6

Views: 3K

A Green's function calculation of an infinite lattice with periodicity in 1D

Dec 16, 2020 · Replies 1 · Dec 20, 2020

Replies: 1

Views: 2K

A Which condensed matter experiment PhD group is the most fun?

Dec 13, 2020 · Replies 8 · Dec 14, 2020

Replies: 8

Views: 3K

B How trapped ions can be used to make Atomic clocks?

Dec 5, 2020 · Replies 2 · Dec 13, 2020

Replies: 2

Views: 2K

I How Can LASER Be Both a Quantum and Classical Light Source?

Dec 5, 2020 · Replies 4 · Dec 5, 2020

Replies: 4

Views: 2K

I Electrostatic waves in a plasma

Nov 28, 2020 · Replies 2 · Dec 4, 2020

Replies: 2

Views: 1K

B What happens when you push a rod?

Nov 28, 2020 · Replies 9 · Dec 2, 2020

Replies: 9

Views: 2K

I 9 y.o. question: will a spoon of neutron star matter explode?

Dec 1, 2020 · Replies 9 · Dec 1, 2020

Replies: 9

Views: 2K

I Why does a hydrogen gas tube produce a hydrogen atomic spectrum?

Nov 27, 2020 · Replies 9 · Nov 30, 2020

Replies: 9

Views: 2K

I What is Diffusion Voltage in Semiconductor Heterojunctions?

Apr 23, 2017 · Replies 1 · Nov 27, 2020

Replies: 1

Views: 4K

A What is the charge neutral point?

Mar 1, 2017 · Replies 1 · Nov 27, 2020

Replies: 1

Views: 6K

I Importance of the energy gap in electronic transport properties

Nov 16, 2020 · Replies 6 · Nov 23, 2020

Replies: 6

Views: 2K

B How can an atom have a negative charge?

Sep 19, 2020 · Replies 22 · Nov 23, 2020

Replies: 22

Views: 4K

I Solid State Physics: Explaining Ashcroft & Mermin's Hall Effect

Nov 6, 2020 · Replies 6 · Nov 22, 2020

Replies: 6

Views: 3K

A What is the role of Berry curvature in solids according to Rev. Mod. Phys?

Nov 10, 2020 · Replies 7 · Nov 13, 2020

Replies: 7

Views: 3K

B Reduced mass to atomic mass units conversion help please

Nov 8, 2020 · Replies 3 · Nov 8, 2020

Replies: 3

Views: 2K

3D Solid State Simulation Software

Oct 26, 2020 · Replies 3 · Nov 5, 2020

Replies: 3

Views: 3K

I What happens to the temperature of a superconductor?

Oct 25, 2020 · Replies 6 · Nov 1, 2020

Replies: 6

Views: 2K

I Hall Effect constant and Cyclotron frequency

Oct 30, 2020 · Replies 2 · Oct 30, 2020

Replies: 2

Views: 2K

I Electron correlation vs electron exchange

Oct 21, 2020 · Replies 4 · Oct 28, 2020

Replies: 4

Views: 3K

B Notation for indexing a crystal direction

Oct 26, 2020 · Replies 4 · Oct 28, 2020

Replies: 4

Views: 2K

A What Are the Key Insights on Bragg/von Lau Scattering in X-Ray Experiments?

Jul 14, 2020 · Replies 2 · Oct 27, 2020

Replies: 2

Views: 2K

I Room Temp Super Conductor: Break Out the Champagne?

Oct 14, 2020 · Replies 4 · Oct 24, 2020

Replies: 4

Views: 2K

I Why are the d and f orbitals in transition metals considered localized?

Oct 19, 2020 · Replies 2 · Oct 21, 2020

Replies: 2

Views: 3K

A Conductance of an interacting quasi one dimensional wire

Oct 17, 2020 · Replies 2 · Oct 20, 2020

Replies: 2

Views: 2K

B Don't understand proof of Bloch theorem

Oct 16, 2020 · Replies 5 · Oct 16, 2020

Replies: 5

Views: 2K

I How Does Finite Size Scaling Reveal Cluster Behavior in 1D Percolation?

Oct 12, 2020 · Replies 5 · Oct 13, 2020

Replies: 5

Views: 2K

I Photons and wavelength in ultrafast optics

Sep 29, 2020 · Replies 11 · Oct 8, 2020

Replies: 11

Views: 2K

I Born-Oppenheimer approximations in molecules

Apr 5, 2020 · Replies 4 · Oct 8, 2020

Replies: 4

Views: 2K

A Taking all the electrons away from a real conductor

Oct 5, 2020 · Replies 2 · Oct 8, 2020

Replies: 2

Views: 2K

A How are the thermal expansion of a solid and the stress tensor related?

Sep 10, 2020 · Replies 3 · Sep 30, 2020

Replies: 3

Views: 2K

I Fermi level in a nonuniformly doped semiconductor

Sep 28, 2020 · Replies 3 · Sep 28, 2020

Replies: 3

Views: 3K

I Is Electron-Electron Interaction Stronger in Metals or Semiconductors?

Sep 16, 2020 · Replies 8 · Sep 18, 2020

Replies: 8

Views: 2K

I Maxwell Boltzmann distribution

Sep 7, 2020 · Replies 5 · Sep 8, 2020

Replies: 5

Views: 2K

I Electron scattering in the Brillouin zone boundary

Sep 3, 2020 · Replies 4 · Sep 5, 2020

Replies: 4

Views: 2K

B Hydrogen anions - how do they form?

Aug 22, 2020 · Replies 21 · Sep 3, 2020

Replies: 21

Views: 3K

B What is Plasma? Is Tungsten Vapour a Gas or Plasma?

Sep 2, 2020 · Replies 3 · Sep 2, 2020

Replies: 3

Views: 2K

Generating rotons in superfluids

Aug 8, 2020 · Replies 3 · Aug 16, 2020

Replies: 3

Views: 2K

I Can Theoretical Models Predict Direct Bandgap Materials for Solar Cells?

Aug 12, 2020 · Replies 4 · Aug 15, 2020

Replies: 4

Views: 2K

I Electric field inside a Superconductor

Aug 14, 2020 · Replies 2 · Aug 14, 2020

Replies: 2

Views: 3K

A Is Symmetry Breaking Occurring in Our Physical System Experiments?

Aug 8, 2020 · Replies 5 · Aug 12, 2020

Replies: 5

Views: 2K

I Converting Unit Cell Volumes of Minerals to Density

Aug 5, 2020 · Replies 3 · Aug 6, 2020

Replies: 3

Views: 2K

A How Does the Two-Particle Green Function Relate to Hartree-Fock Theory?

Aug 2, 2020 · Replies 8 · Aug 5, 2020

Replies: 8

Views: 2K

A Antiferromagnetic ground state due to superexchange

Jul 17, 2020 · Replies 6 · Jul 30, 2020

Replies: 6

Views: 2K

A Graphene wavefunction expressed in tight binding form

Jul 26, 2020 · Replies 7 · Jul 29, 2020

Replies: 7

Views: 3K

A Clarifying question about surface states

Jul 21, 2020 · Replies 4 · Jul 23, 2020

Replies: 4

Views: 2K

A Help with the Derrick scaling argument and topological solitons

Jul 11, 2020 · Replies 2 · Jul 15, 2020

Replies: 2

Views: 2K

I Topological Defects: Can They Induce Phase Transitions?

Jul 15, 2020 · Replies 1 · Jul 15, 2020

Replies: 1

Views: 1K

A DFT calculations for metal oxide semiconductors and graphene oxide

Jul 8, 2020 · Replies 3 · Jul 9, 2020

Replies: 3

Views: 2K

I How does contact occur at the atomic level?

Jun 29, 2020 · Replies 27 · Jul 7, 2020

Replies: 27

Views: 3K

Thermal penetration depth experiment

Jul 4, 2020 · Replies 2 · Jul 5, 2020

Replies: 2

Views: 2K

I How can I calculate the lattice parameter for building Argon atoms using LAMMPS?

Jun 27, 2020 · Replies 1 · Jun 27, 2020

Replies: 1

Views: 2K

I Are the electrons in the conduction band completely free?

Jun 24, 2020 · Replies 11 · Jun 25, 2020

Replies: 11

Views: 4K

I Energy of Conduction and Valence Band in Opposing Directions

Jun 9, 2020 · Replies 6 · Jun 22, 2020

Replies: 6

Views: 3K

A Relativistic Effects on Particles and Gases

Jun 18, 2020 · Replies 18 · Jun 19, 2020

Replies: 18

Views: 3K

I Phonon Number Conservation in a Single Mode Oscillation Experiment

Jun 16, 2020 · Replies 7 · Jun 18, 2020

Replies: 7

Views: 2K

I Bose Einstein Condensate For Oxygen 16 and Oxygen 18

Dec 18, 2019 · Replies 1 · Jun 9, 2020

Replies: 1

Views: 2K

B Why don't solids always stick together?

Apr 26, 2020 · Replies 5 · Jun 6, 2020

Replies: 5

Views: 4K

I Damage threshold of short pulses....

May 31, 2020 · Replies 4 · Jun 1, 2020

Replies: 4

Views: 2K

A Laser Ablation of a fused silica surface

May 17, 2020 · Replies 10 · May 28, 2020

Replies: 10

Views: 2K

I Confused about fluorescence at resonance

May 21, 2020 · Replies 5 · May 27, 2020

Replies: 5

Views: 3K

A A derivation in Stoner's "The Demagnetizing Factors for Ellipsoids"

Jun 25, 2019 · Replies 8 · May 20, 2020

Replies: 8

Views: 3K

I Bose-Einstein condensate diagram

May 14, 2020 · Replies 7 · May 19, 2020

Replies: 7

Views: 4K

I Power Broadening: Explained & Resources

May 15, 2020 · Replies 1 · May 18, 2020

Replies: 1

Views: 5K

B Is there a Relativistic Quantum Chemistry Table?

May 16, 2020 · Replies 1 · May 16, 2020

Replies: 1

Views: 2K

I Error on a transition frequency

May 12, 2020 · Replies 5 · May 14, 2020

Replies: 5

Views: 2K

Calculating Spin Texture in Wien2K for TI Bi2Te3

Jun 3, 2012 · Replies 1 · May 12, 2020

Replies: 1

Views: 6K

A Deriving Ginzburg-Landau Theory from BCS: A Simplified Approach

Apr 28, 2020 · Replies 13 · May 11, 2020

Replies: 13

Views: 4K

A What Is the Significance of ε(∞) in Plasma Dielectrics?

May 6, 2020 · Replies 1 · May 7, 2020

Replies: 1

Views: 2K

B Mechanical Resonance and Natural Frequency at the Atomic/Lattice Level

Apr 30, 2020 · Replies 3 · May 2, 2020

Replies: 3

Views: 2K

I Doubts regarding atomic spectra of mono-electron species

Apr 25, 2020 · Replies 3 · May 2, 2020

Replies: 3

Views: 2K

I What is the Relationship Between Lattice Points and Basis Balls?

May 1, 2020 · Replies 1 · May 1, 2020

Replies: 1

Views: 2K

A B.D. Cullity § C.D. Graham-Introduction Magnetic Materials Solutions

Apr 14, 2020 · Replies 1 · Apr 14, 2020

Replies: 1

Views: 3K

A Effective Spring Constant of a Chain Polymer

Apr 9, 2020 · Replies 2 · Apr 10, 2020

Replies: 2

Views: 3K

I Is it true that isotropic biaxial strain does not lower C2 symmetry?

Apr 2, 2020 · Replies 11 · Apr 5, 2020

Replies: 11

Views: 2K

B Why don't the air atoms in the microwave warm up?

Apr 4, 2020 · Replies 4 · Apr 5, 2020

Replies: 4

Views: 2K

I CM frame kinetic energy for a molecule

Apr 2, 2020 · Replies 2 · Apr 3, 2020

Replies: 2

Views: 2K

A Why is the spin orientation crucial in the Kondo effect?

Mar 29, 2020 · Replies 4 · Apr 1, 2020

Replies: 4

Views: 2K

I Fermi-Liquid - amount of electrons available for the interaction

Mar 26, 2020 · Replies 5 · Mar 28, 2020

Replies: 5

Views: 2K

I Vibrational energy in molecules

Mar 24, 2020 · Replies 12 · Mar 25, 2020

Replies: 12

Views: 3K

B Chemical Potential μ in Solids

Mar 24, 2020 · Replies 1 · Mar 25, 2020

Replies: 1

Views: 2K

I Why are crystals more conductive then amorphous structures?

Mar 23, 2020 · Replies 13 · Mar 24, 2020

Replies: 13

Views: 4K

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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