TY - JOUR

T1 - Topology of spin polarization of the 5d states on W(110) and Al/W(110) surfaces

AU - Rybkin, A. G.

AU - Krasovskii, E. E.

AU - Marchenko, D.

AU - Chulkov, E. V.

AU - Varykhalov, A.

AU - Rader, O.

AU - Shikin, A. M.

PY - 2012

Y1 - 2012

N2 - The spin polarization of W(110) and Al/W(110) surfaces is studied by spin- and angle-resolved photoemission. On both surfaces distinct E(kii) dispersions are identified with an unusual topology: A single spectral branch is spin polarized antisymmetrically relative to the Г point, and two spin-polarized branches cross at Г. The crossing branches disperse linearly but this similarity to a Dirac cone is lost after deposition of the Al, where they acquire a parabolic dispersion. Based on ab initio one-step photoemission theory, we show that the measured spin polarization is a property of the ground state and identify the effect as the counterpart of the recently discovered Rashba polarization of bulk states at the surface, but with a distinct non-Rashba topology.

AB - The spin polarization of W(110) and Al/W(110) surfaces is studied by spin- and angle-resolved photoemission. On both surfaces distinct E(kii) dispersions are identified with an unusual topology: A single spectral branch is spin polarized antisymmetrically relative to the Г point, and two spin-polarized branches cross at Г. The crossing branches disperse linearly but this similarity to a Dirac cone is lost after deposition of the Al, where they acquire a parabolic dispersion. Based on ab initio one-step photoemission theory, we show that the measured spin polarization is a property of the ground state and identify the effect as the counterpart of the recently discovered Rashba polarization of bulk states at the surface, but with a distinct non-Rashba topology.

U2 - 10.1103/PhysRevB.86.035117

DO - 10.1103/PhysRevB.86.035117

M3 - статья

VL - 86

SP - 035117_1-5

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 3

ER -