Fermi Nesting between Atomic Wires with Strong Spin-Orbit Coupling

The mutual interplay between superlattice structures, band filling factors, and spin-orbit coupling results in a highly correlated electronic spin and charge state found for an array of atomic Pb wires grown on Si(557). By means of spin-and angle-resolved photoemission spectroscopy, the spin texture close to the Fermi surface was found to be alternating and equidistant; thus, Fermi nesting occurs in between bands with the same spin helicity, giving rise to spin-polarized charge-density waves in the direction across the wires. An out-of-phase superposition of both Rashba channels is manifested by an extraordinary large Rashba splitting of Delta k(0) = 0.2 angstrom(-1) g/2, where g is a reciprocal lattice vector defined by the interwire distance and fits into the model of spin-density waves in antiferromagnetically ordered chain structures. The implications towards spin-polarized transport along the wires will be discussed. DOI: 10.1103/PhysRevLett.109.266401


Published in:
PHYSICAL REVIEW LETTERS, 109, 26
Year:
2012
ISSN:
0031-9007
Laboratories:




 Record created 2015-06-23, last modified 2018-01-28


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