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 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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Undergrad Emission lines and absorption lines
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Graduate What is Mott Transition and its basic Priniciple?
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High School Unveiling the Mystery of Invisible Atoms
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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 How the atom was proven to exist?
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Graduate Is there a model for ionization of N2 in air under an electric field?
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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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Graduate 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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Graduate Plotting Band Structure in Graphene for Scientists
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Graduate 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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Undergrad Understanding solar cell band diagram
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Undergrad How do I show a skeptic that atoms/molecules actually exist?
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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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Graduate The Hamiltonian of the XY model -- when is it called the XX model?
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Undergrad Soft Question: Possible Applications of Rydberg Polarons?
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Undergrad Width of one electron shell of a hydrogen atom
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Undergrad Is the total Spin operator a vector
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Graduate Dyson's equation and Green's functions
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Undergrad Flux pinning effect and hysteresis loop
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Graduate Topological Phases: Understanding Kitaev's Paper
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Undergrad What is the significance of the Ground State Lamb Shift in modern physics?
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Undergrad ABC model for GaAs infrared LED
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Undergrad Only certain emission lines show up in absorption spectrum
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Undergrad Feshbach resonance: ELI5 or resources for undergraduate
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Undergrad What Limits the Number of Bravais Lattices to Just 14?
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Graduate Reflection or emission of a photon
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Undergrad Photon BEC: Hypothetical Universe End-State
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Graduate Change in phonon dispersion with pressure
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Undergrad Identification of index of Bragg peaks for NaCl
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Undergrad How to index single crystal Bragg peaks
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High School Practical use of Bose-Einstein condensate?
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Graduate Derivation in Ashcroft and Mermin (The Pseudopotential)
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Graduate Physical meaning of terms in the Qi, Wu, Zhang model
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High School What makes a material an insulator?
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Undergrad Free Vibrations of a linear triatomic molecule
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Undergrad Is Negative Mass a Reality or Just a Scientific Analogy?
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Undergrad Metallic hydrogen created in the lab
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Undergrad Calculate the distance between two cleaved crystals
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Undergrad Where does the name of XY model come from?
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Graduate How to calculate the degeneracy of an energy band?
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Undergrad Understanding Magnetometer & SQUID Property Measurement Systems
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Graduate Laser beam represented with complex conjugate?
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Undergrad Examples of atoms that have more than 8 electrons in shell
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Graduate Why Do UV Photoabsorption Cross Sections Show a Kink at 10-100 Angstrom?
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Undergrad How do I make an atomic oscillation?
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Graduate Understanding Hypersonic vs Regular Sound Speed in Condensed Matter
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Undergrad Density Functional Theory and pseudopotentials
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Undergrad Hydrogen plasma compression with liquid Mercury piston
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Undergrad Superinsulators: How Do They Achieve Infinite Resistivity on an Atomic Level?
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Undergrad Atomic Radii Table | Element & Isotope Charge Radius
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Graduate Solving F-N Tunneling Equation Unit Match Problem
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High School Laser Production: Uncovering the Science and Processes Behind It
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Graduate AC transport data query (using a PPMS system)
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Graduate What is the value of optical effective electron mass for tin
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