Physics – Condensed Matter – Materials Science
Scientific paper
2011-07-17
Physics
Condensed Matter
Materials Science
5 pages, 2 figures, ARPES experiment on Cu included; author list updated, This version will not be published. A newer version,
Scientific paper
Rashba-split surface band is characterized by a one-to-one correspondence between the electron's momentum k and its spin orientation. Here we show that a similar correspondence between momentum and orbital angular momentum (OAM) must exist on surface bands once the inversion symmetry is broken. The correspondence is valid even when there is no spin-orbit interaction. Tight-binding and first-principles calculations are presented to support our claim. As a method to detect such OAM-momentum correspondence, we propose the circular dichroism (CD) experiment using the angle-resolved photoemission (ARPES) setup. CD-ARPES experiment performed on Cu surface confirms the existence of chiral OAM. A new concept of "orbital Galvanic effect" is proposed.
Arita Masashi
Han Jung Hoon
Kim Beom Young
Kim Changyoung
Kim Choong H.
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