Atomic and Condensed Matter Forum

Undergrad How are very low temperatures(-180k) measured?

Graduate How Do You Calculate the Volume of a Wigner-Seitz Cell in an FCC Lattice?

Graduate How Does a Cesium Atomic Clock Work?

Graduate Greens functions and density of states

Graduate Is metallic hydrogen superconductive at 273k

Graduate Conduction band and antibonding orbitals

Graduate How does tunneling explain the behavior of transistors in BJT and FET devices?

Graduate Longitudinal resistivity in the Quantum Hall Effect

Undergrad Calculating ratio c/a as 1.633 in HCP?

Graduate Elastic modulii relation for a sphere

Graduate Energy Bands: Kronig-Penney Model

Graduate Effect of Doping on Fermi Energy

Graduate Lennard Jones- reduced units

Undergrad Energy required for creation of photoelectron

Undergrad What is off resonance rapi frequency?

Graduate How to calculate the band structure?

High School Determining atomic radius at home

Graduate Wave eqtion of electron in a periodic potential

Graduate Spin orientation by optical technique

High School What does He-Like or Ni-Like mean?

High School The forces in an atomic nucleus

Graduate Graph of potential energy versus internucleon distance in an atom

Undergrad Drift speed of electrons and holes in semiconductors

Graduate Space groups derivation (Schoenflies)

Undergrad Elastic deformation of a solid body & heat

Graduate How to experimentally determine whether have adirect or indirect semiconductor?

Graduate Proof that the n brillouin zones are of equal areas?

Graduate Large Static E Field, Dielectric Break Down, Quantum View

Graduate Band gap - violation of principle of least energy?

Undergrad Lithium Gas: Solid to Gas Conversion Processes?

Graduate Hamiltonian of a metal lattice

Graduate What is Spin Temperature? - Definition & Explanation

Undergrad Understanding Molecule Theory: Tips and Tricks for Hands-On Physics Enthusiasts

Graduate Why Does Electron Flow Differ in Direction at a Metal-Semiconductor Junction?

Graduate Fermi Dirac distribution function

Undergrad Water O-H Bond Length: Evidence & Measurement

Graduate Broken symmetry, superconductivity and all that

Graduate Vanishing fermi level and cut off value in self energy

Undergrad Effect of electric field on water

Graduate How Does the Fermi Level Influence Solar Cell Voltage?

Graduate Laser: Second harmonic generation

Graduate Understanding the Strain Tensor Component: Physical Meaning of d'_{ijk}E_{k}

Undergrad Capacitance of a forward biased diode

Undergrad How to calculate lattice parameters?

Graduate Calculating Phonon Self Energy for Electron-Phonon Interaction in Graphene

Graduate Crystal field effect on level splitting

Graduate A question about the Inglis-Teller limit?

Graduate Calculate Transmission & Concentration Using Beer-Lambert Law

Graduate Effect of Compression on Fermi Energy.

Graduate How do electrons in tungsten atoms produce X-rays?

Graduate Understanding Coherence in Laser Light Emission

Graduate Relationship between Electron Momentum and Fermi Momentum

Undergrad Why Can't We Pass Through Solid Objects if Atoms Are Mostly Empty Space?

Graduate Free Electron Model: Success & Metallic Density of States

High School What is atomic concentration and how can it be found for different elements?

Undergrad Coulomb's Explosion: Macroscopic Level?

Graduate Some questions on properties of superconductors

Graduate What are the best resources for understanding MO and LCAO in quantum chemistry?

Graduate Fine Structure Effects: Physical Interpretation

Graduate Analysis of Lorentz Force in Semiconductor

Graduate Energy Bands and Brillouin Zones

Graduate Main Applications of ARPES today?

Graduate Difference between 1D lattice and 2D lattice on BEC

Graduate How are emission spectra of gases affected by being in water?

Graduate Phi (1.6) Found at Quantum Level: Major Breakthrough?

Undergrad What is Phonon Replica? A Brief Explanation

Undergrad Photoluminescence vs Absorption

Graduate Calculating the Bohr radius or velocity of an excitons

Graduate Partition Function for Phonons

Undergrad Understanding Effective Mass in Solid State Physics

Graduate Justification of Molecular Dynamics (MD)

Graduate Material with net angular momentum (not just a magnet)

Graduate Energy spectrum from dispersion relation E(k)

Undergrad Current limitation through multijunction solar cell

Graduate How Do Inert Gases Form Crystals According to Charles Kittel?

Graduate Laser: CW-oscillation in a 3-level laser

Graduate Metals with what type of crystal lattice less prone to brittle fracture?

Graduate Do you know the meaning of the Zero phonon or phonon-assisted?

Undergrad Methods for determination of structure of solid?

Graduate What actually are electron holes?

Graduate Thermal expansion (anharmonic effect)

Graduate Numerical evaluation of Sommerfeld Integral

Graduate How Do I Calculate the Dynamical Matrix for a Crystal with a Pair Potential?

Graduate Difference b/w excited state and metastable excited sate?

Graduate Surface Greens' function in coherent transport calculations

Undergrad Superconductivity: difference between s-wave and d-wave

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Graduate Does the superconductivity-Meissner effect break electromagnetic symmetry?

Graduate Rotational spectrum - equidistance

Undergrad STM Questions: Graphite Surface Reconstruction

Graduate LLG Equation + Spin Torque, A simple derivation

Graduate D-dimensional density of states and specific heats (phonons and electrons)

Graduate How Does Screening Work in a Metal with a Background Charge Density?

Graduate Band structure and fermi liquid

Graduate How Do Ashcroft and Mermin Derive the Cyclotron Effective Mass Expression?

Undergrad Interplanar spacing d using braggs law

Undergrad Is color added to SEM and TEM images in post-processing?

Undergrad Can a 1 kilometer giant straw function like a regular straw?

Graduate Langevin dynamics random force term generation algorithm

Undergrad Does the smallest unit of matter possess depth or space?

Graduate Helium 3 and Artificial Creation of Isotopes