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 Debye model and reciprocal space
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Graduate Two questions on Feynman diagram and Green's function
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Undergrad Question about the Debye model of solids
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Undergrad How come electrons and phonons lead to the heat equation?
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Undergrad Why are more x-rays made from metal than glass
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Graduate What Does 1D Mean in the Term Symbol 2p2 1D for Helium?
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Undergrad Effective electron mass of tungsten
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Undergrad Energy Transfer Mechanism in Helium Neon Gas Laser
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High School I want to know about cold finger cryostat?
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Graduate Diffraction on periodic Structures
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Undergrad Understand Tight Binding Method: Coulomb Potential, 2D Case & More
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High School Magnons: Alternative to Electrons for Circuit Design
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Undergrad Basic questions about superconductivity
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Undergrad The sign of coupling Hamiltonian in CQED
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Graduate Photovoltaic Effect in CdS or CdSe
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Undergrad Noble gases with even nuclear spin form superfluids?
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Undergrad Bloch Waves within Tight Binding Approximation
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Graduate The hermicity of a k.p matrix?
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Graduate The k direction in a k.p model ?
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Graduate Incorrect Hybrid Polariton Dispersion Results
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Graduate What's the meaning of "Incompressible" for FQHE?
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Graduate Help with determination of crystal orientation
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Graduate Viscosity from DFT (VASP) using the Green-Kubo relation
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Graduate Symmetries of a Diamond Unit Cell - Point Group Confusion
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Graduate Size of nuclei wave function in a crystal
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Graduate Mott insulators and electron-electron insulators
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Graduate Derivation of the Heisenberg equation for electron density
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Undergrad Difference between A and B irreps
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Undergrad I understanding the meaning of Bloch waves
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Undergrad Are solar cells operated under any kind of bias or not?
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Undergrad What does this notation mean? ex: 1s:A, 1s:E
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High School Is this real verified science?
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Undergrad Temperature limits on Debye's Calculationp
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Undergrad Allowed infrared absorption in simple London crystals
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Graduate Subtract Radiated from Background Spectrum to Analyze Absorption Spectrum
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Graduate Surface states of 3D topological insulators
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Graduate Measuring Viscosity via the Speed of Sound
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Graduate What resources are available for using DFT to study 1D materials in physics?
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Undergrad Radiative and Nonradiative Transitions
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High School The Nature of Reality: Understanding the Behavior of Subatomic Particles
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Graduate Charge density of carbon nanotubes and graphene
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Graduate Bloch theorem proof with V(x)=V(x+ma)
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Band diagram, conductivity tensor
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Graduate Why do we need to know "two-bands" Hall coefficient and magn
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Graduate Is Block Spin Still ±1 in Ising Model?
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Undergrad What are the applications of YBCO bulks?
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Undergrad How much does it cost to synthesize YBCO?
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Undergrad Relative Permitivity, Permeability & Refractive Index of Water
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Undergrad What should be continuous at the interface of two materials?
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Undergrad Do electrons have a net motion when a DC voltage is applied?
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Undergrad What is zero and infinite effective mass?
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Graduate Do wave-packets of Blochwaves spread over time?
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Undergrad Flux pinning in type 2 superconducotrs
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Graduate Criticality, phase transitions and closing bandgap
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Graduate What is Mott Transition and its basic Priniciple?
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Undergrad Density of States: 1-Dim Linear Phonons & Electrons Differences
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Graduate Time reversal symmetry and Bloch states
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High School Why is an electric arc needed for spectroscopy of clear gases?
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Undergrad Calculating Transition Energies from 2p to 1s: Need Help with Formula?
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Graduate Why is ##\omega_c \tau >>1## for several revolutions?
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Undergrad Dimensions of Angular and Radial Nodes
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Undergrad Heavy/Light Holes, what of Electrons?
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Undergrad A question about antiferromagnetism in an external B field
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Graduate How many bands does a solid have?
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Undergrad Question about Powder X-ray diffraction experiment
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Undergrad How Do Metals Reflect Light Across Different Frequencies?
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Graduate Conductivity and Integration over Fermi-Sphere?
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Undergrad Nature of matter: state question
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Graduate How does parity transformation affect Bloch states?
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Undergrad New result in high temp superconductivity
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Graduate The Future of "Soft Matter Physics"
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Undergrad Non-contact methods for measuring voltage in conductive materials
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Undergrad Drift velocity in P-N Junctions
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Undergrad Is there a crystal angular momentum?
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Undergrad Atomic Layers calculation in Feynman lectures
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Undergrad Why can't there be a 2-level laser with Non-Optical Pumping
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Undergrad Rotational Spectra: Why Absorption & Not Emission Lines?
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Undergrad Valence band and Fermi level difference?
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Graduate Recovering Wavefunction in Periodic Ab Initio Calculations
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High School Superfluid Helium and its use at CERN
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Undergrad Fermi-Dirac distribution, when does it break?
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Graduate How Does Spin-Dependent Chemical Potential Generate a Spin Current?
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Undergrad Why don't absorption and emission spectra "cancel out"?
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High School Coloured beam in a discharge tube
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Graduate Scattering states at presence of interface with strong SOC
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Undergrad Boltzmann Distribution: Feynman's treatment of p-n junction
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Graduate What Other Symmetries Exist in Superfluids?
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Undergrad What Caused the Lower Resistance in the Second Graph?
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Spin-orbit coupling at the interface between two metals
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Undergrad Is Ohm's Law Applicable to Semiconductors in a Magnetic Field?
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Graduate What is inversion symmetry in solids and why does it break at the surface?
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Undergrad How is this formula for the speed of sound derived?
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Graduate Elastically anisotropic sphere under pressure
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Plotting Band Structure in Graphene for Scientists
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New Material Created Known As 'Kagome Metal'
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Undergrad Resistance and magnetic field effects for p-doped Ge
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Graduate Interface states in a PIN diode
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Undergrad Mean speed of electrons in a periodic potential / lattice
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Graduate What Other Phenomena Involve Nuclear Excitations Coupling with Lattice Phonons?
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Undergrad Density of States -- alternative derivation
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