Atomic and Condensed Matter Forum

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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.
Undergrad Use the Ewald sphere to calculate h,k,l?
  • Lars Ph
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Undergrad Use the Ewald sphere to calculate h,k,l?
  • Lars Ph
  • · Replies 1 ·
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1
High School What causes the drop of latent heat at lower temperatures in liquid helium?
  • snorkack
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Graduate Energy levels shifts in a time-varying electric field
  • BillKet
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High School Atomic Energy Levels: Simplified Explanations for the Curious
  • abrogard
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High School Quantum Physics and Atomic Physics
  • Vectronix
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High School Can atoms not notice each other?
  • icakeov
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Graduate Why is the Brillouin zone a torus?
  • taishizhiqiu
  • · Replies 18 ·
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Graduate Superconducting and normal electrons are not interchangeable
  • StanislavD
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Graduate Question about Stark interference
  • BillKet
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Graduate What is the Wigner–Seitz cell of diamond?
  • Urza_tron
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Undergrad Collision-induced free-free absorption in fluids and superfluids
  • snorkack
  • · Replies 13 ·
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Undergrad Selection Rules for a Diatomic Molecule?
  • Sebacide
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Undergrad Compton scattering experiment
  • Viona
  • · Replies 1 ·
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Graduate Time dependent perturbation theory applied to energy levels
  • BillKet
  • · Replies 5 ·
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5
Graduate Poor convergence using Fe HMOs for FMO in Gamess
  • WillCawdell
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Undergrad Is it possible to have "ideal surface" whose highest peak is ~1 nm?
  • gggnano
  • · Replies 13 ·
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Graduate Trying to reproduce the energy levels of a molecule from a paper
  • BillKet
  • · Replies 5 ·
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5
Undergrad Characteristic X Rays: Understanding Atom Reversion
  • Viona
  • · Replies 1 ·
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Undergrad Why is resistivity inversely proportional to resistance for NTC semiconductors?
  • homeworkhelpls
  • · Replies 3 ·
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3
Undergrad Energy levels of atoms and spectroscopic analysis
  • MartinG
  • · Replies 13 ·
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Undergrad Emission of light from incandescence of metals
  • bentzy
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5
Graduate Kirkendall effect: vacancy concentration and pair interaction energy
  • always_learning
  • · Replies 1 ·
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Undergrad How azimutal quantum number got its range value
  • Avanthica
  • · Replies 5 ·
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Graduate Electrical & thermal conductivities
  • bentzy
  • · Replies 6 ·
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6
Graduate Error signal when locking a cavity
  • kelly0303
  • · Replies 56 ·
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Undergrad What do the Roman Numerals mean in Spectroscopic Data?
  • arthurhaythornthwait
  • · Replies 4 ·
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Graduate Quantum projection when measuring state population
  • BillKet
  • · Replies 8 ·
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8
Graduate Weird beam behavior in a cavity
  • kelly0303
  • · Replies 6 ·
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6
Graduate Description of in-band relaxation?
  • mksiver
  • · Replies 2 ·
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Graduate Unknown large linewidth of the fringes of a cavity
  • kelly0303
  • · Replies 5 ·
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Graduate Experiments for temperature dependence of persistent supercurrent?
  • StanislavD
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Undergrad Electron transitions within the same excited state?
  • pingaan
  • · Replies 7 ·
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Graduate Understand Electronic Dispersion: Definition & Examples
  • nouha
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Undergrad Is a phonon a quasiparticle or a collective excitation?
  • emmaphysicshelp229
  • · Replies 12 ·
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Undergrad Trying to better understand temperature and entropy
  • Jaccobtw
  • · Replies 1 ·
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Undergrad Polarization in Rabi oscillations
  • Malamala
  • · Replies 5 ·
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5
Undergrad Why Are 8 Valence Electrons Essential for Atomic Stability?
  • jwags99
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High School Can you create neutronium by colliding electrons and protons?
  • arusse02
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Undergrad Can Superconductors Reach Relativistic Speeds and Emit Synchrotron Photons?
  • sol47739
  • · Replies 6 ·
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Graduate AC Stark shift in diatomic molecules
  • BillKet
  • · Replies 6 ·
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6
Graduate How can I overcome alignment issues with a bow-tie cavity?
  • kelly0303
  • · Replies 3 ·
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Graduate Question about bow-tie cavities
  • kelly0303
  • · Replies 7 ·
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Undergrad Questions about Curie Temperature Characteristics
  • korneld
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Undergrad Superconductors and moving/accelerating charges
  • sol47739
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Graduate Dressed states for a 3 level system
  • BillKet
  • · Replies 6 ·
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6
Graduate BCS theory of superconductivity and eternal supercurrents?
  • StanislavD
  • · Replies 8 ·
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8
Graduate Experimental Semiconductor Bandgap Databases
  • NikolaiSimonov
  • · Replies 3 ·
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Undergrad Absorption and emission spectroscopy of atoms
  • MartinG
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Graduate Which one of the GGA or G0W0 calculations is more accurate?
  • Mohammad-gl
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Undergrad Why are the spectral lines weak in my hydrogen Geissler tube?
  • Orthoceras
  • · Replies 8 ·
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Undergrad What actually is the free energy? Why is it useful?
  • Tim667
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Graduate Selection rule for spectra with circular polarization
  • forever_physicist
  • · Replies 2 ·
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Undergrad P-n junction diodes (Both bias)
  • kev0
  • · Replies 1 ·
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Undergrad Ion Ablation Target Experiment: Estimating Energy Spread
  • kelly0303
  • · Replies 6 ·
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6
Graduate How to interpret this equation in Szabo & Ostlund's book
  • compchemrulez
  • · Replies 9 ·
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9
Undergrad I have a question about the mathematical model of a reflective curve
  • hagopbul
  • · Replies 5 ·
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Undergrad Hartree-Fock / Szabo & Ostlund book
  • compchemrulez
  • · Replies 2 ·
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2
High School Something strange about doping semiconductors
  • DrDu
  • · Replies 1 ·
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Undergrad XRD Scherrer Equation -- need explanation
  • physicist888
  • · Replies 1 ·
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High School Proof of the existence of atoms
  • Thecla
  • · Replies 53 ·
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Undergrad Bragg condition and Bloch states
  • Simobartz
  • · Replies 7 ·
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7
Graduate Interpreting UV absorption spectra
  • nana_yaw
  • · Replies 1 ·
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Undergrad Transition Dipole Moments for Strontium
  • thatboi
  • · Replies 1 ·
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Graduate Probability of resonant ionization
  • Malamala
  • · Replies 18 ·
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Graduate Indirect and direct band gaps in silicon
  • Aun-shi
  • · Replies 1 ·
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1
High School What is the focus of Atkins' popular textbook in physical chemistry?
  • chow_dhury
  • · Replies 20 ·
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Undergrad Calculating the specific heat capacity for the 2D Ising model
  • julian
  • · Replies 1 ·
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Undergrad Numerical Calculation of Hamiltonian Overlaps
  • thatboi
  • · Replies 1 ·
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Undergrad What determines the time between atomic absorption and emission of photons?
  • dsaun777
  • · Replies 19 ·
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Graduate Fourier Transform MW spectroscopy in a FB cavity
  • kelly0303
  • · Replies 1 ·
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Undergrad Derivation of Voigt's Shear Modulus
  • mgong21
  • · Replies 1 ·
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Graduate How Can You Identify Perovskite in Solar Cells Without Advanced Lab Techniques?
  • Ananya2018
  • · Replies 5 ·
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Graduate How Do Measurements and Excitation Wavelengths Affect Single NV Center Analysis?
  • annaphys
  • · Replies 1 ·
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Undergrad Measuring the built-in potential of a pn junction
  • Mayan Fung
  • · Replies 10 ·
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Graduate Vibrations in a bow-tie cavity
  • kelly0303
  • · Replies 16 ·
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Graduate Ray Tracing Simulator: Simulating Gaussian Beam in Bow Tie Cavity
  • kelly0303
  • · Replies 1 ·
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Undergrad Wave in phonon as "forward and backward" movement vs temperature
  • C Roth
  • · Replies 4 ·
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Undergrad Isotope measurements in molecules
  • BillKet
  • · Replies 4 ·
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Undergrad How Small Can a Transistor Be and Still Work Reliably?
  • OscarCP
  • · Replies 19 ·
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Undergrad Can resonance be used to split a molecule of CO2?
  • Sveral
  • · Replies 34 ·
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Graduate Magnetic sublevels of a random atom
  • Malamala
  • · Replies 8 ·
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Undergrad Vanadium oxide oxidation states binding energy -- unequal spacing
  • sliqu
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Graduate Laser signal input for PDH lock
  • kelly0303
  • · Replies 6 ·
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Undergrad Trouble understanding the SI definition of 1 second
  • vcsharp2003
  • · Replies 56 ·
2
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Graduate Accounting for Astigmatism in Bow Tie Cavity: Finding the Optimal Cavity Length
  • kelly0303
  • · Replies 9 ·
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9
Graduate Surface impedance equation for resonators
  • annaphys
  • · Replies 8 ·
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8
Undergrad Space Group Symmetry: What is F d3m Spinel Structure?
  • Rzbs
  • · Replies 2 ·
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Undergrad Capping layer in semiconductor quantum dot fabrication
  • ubergewehr273
  • · Replies 1 ·
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Undergrad Magnetization inside a diamagnetic material antiparallel to ##B_{ext}##
  • Wrynn
  • · Replies 1 ·
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Graduate A good quantum number for Cnv symmetry?
  • Amentia
  • · Replies 5 ·
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Undergrad Broken symmetry in ferromagnetism
  • jean194
  • · Replies 6 ·
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6
Graduate How to simulate an isotope shift measurement
  • Malamala
  • · Replies 1 ·
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Graduate Centrifugal distortion of a diatomic molecule
  • kelly0303
  • · Replies 1 ·
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1
Graduate Question about an equation from anapole measurement paper
  • BillKet
  • · Replies 1 ·
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1
Graduate "Cross-section" and "half-life" of excited states
  • DenisH
  • · Replies 3 ·
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Graduate Question about a measured spectra
  • BillKet
  • · Replies 7 ·
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Undergrad What makes cobalt oxide (co3o4) a magnetic material?
  • Rzbs
  • · Replies 1 ·
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Undergrad What are thermal fluctuations?
  • Trollfaz
  • · Replies 1 ·
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Undergrad Survivability in 1 psi zone: How screwed am I?
  • mjagz81
  • · Replies 7 ·
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