6533b7d4fe1ef96bd12626f8
RESEARCH PRODUCT
Circular Dichroism in Photoemission from Nonmagnetic, Low- Z Solids: A Conspicuous Effect of the Photon Spin
C. WestphalGerd SchönhenseGerd SchönhenseJoachim BansmannJoachim BansmannMathias Getzlaffsubject
PhysicsCircular dichroismPhotonCondensed matter physicsInverse photoemission spectroscopyGeneral Physics and AstronomyAngle-resolved photoemission spectroscopyHelicityPhotoexcitationCondensed Matter::Materials SciencePhoton polarizationCondensed Matter::Strongly Correlated ElectronsAtomic physicsCircular polarizationdescription
A new phenomenon has been observed in solid-state photoemission with circularly polarized light. Its outward appearance is similar to the circular dichroism in photoabsorption. For special observation geometries, large photoelectron intensity asymmetries arise upon reversal of the photon helicity. The effect is not based on spin-orbit interaction, as is demonstrated by the example of photoemission from graphite (Z = 6). Similar asymmetries are expected for all single-crystal solids thus opening up a new class of experiments providing new tests for photoemission theories. Detailed information on the dynamics of photoexcitation of a solid can be gained, as discussed in terms of a simple orbital model.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-02-07 | Europhysics Letters (EPL) |