In solid state physics, a particle's effective mass is the mass that it seems to have when responding to forces, or the mass that it seems to have when interacting with other identical particles in a
Constant energy ellipsoids in silicon near the six conduction band minima. For each valley (band minimum), the effective masses are mℓ = 0.92me ("longitudinal"; along one axis) and mt = 0.19me ("transverse"; along two axes).
Angle-resolved photoemission spectroscopy is an experimental technique used in condensed matter physics to probe the allowed energies and momenta of the electrons in a material, usually a crystalline
Effective mass (solid-state physics)
…c = e B 2 π m ∗ . In recent years effective masses have more commonly been determined through measurement of band structures using techniques such as angle-resolved photoemission spectroscopy (ARPES) or, most directly, the de Haas–van Alphen effect. Effective masses can also be estimated using the coefficient γ of the linear term in the…
A view through the window of an ultrahigh vacuum chamber for angle-resolved photoemission spectroscopy. The crystal holder with integrated e-beam heating is attached to a xyz+theta manipulator on top, and by a silver braid to a cryocooler on the bottom. The lens of the electron analyzer and UV source capillary are visible on the right.