Enhanced spin relaxation in an ultrathin metal film by the Rashba-type surface

Abstract

We measured the magnetoconductance of bare and √ 3 × √ 3-Bi/Ag-terminated ultrathin Ag(111) films by the micro-four-point probe method as a function of the applied magnetic field. The experimental curves were analyzed by introducing the results of photoemission investigation and band-structure calculations into the Hikami-Larkin-Nagaoka formula, in order to derive the characteristic fields of the two systems. The formation of the Rashba-type surface alloy was found to reduce the spin-relaxation time in the ultrathin film significantly.

Anisotropic electronic conduction in metal nanofilms grown on a one-dimensional surface superstructure

“…Yet, the effective mass (m * ) of these bands at the Fermi level, which determines the Fermi velocity, is almost equal along the two directions. In particular, our data compare well with the results of ARPES measurements for Ag films on Si(111) [9,27] and nearly free electron like model calculations [28], which give m * x = m * y = (0.42 ± 0.06)m e , v kx = v ky = (7.6 ± 0.23) × 10 5 m/s for the n = 1 state, and m * x = m * y = (0.69 ± 0.04)m e , v kx = v ky = (9.6 ± 0.23) × 10 5 m/s for n = 2-5 states. Here m e is the rest mass of a free electron and n is the quantum number identifying a quantum well band.…”

Nonmonotonically tunable Rashba spin-orbit coupling by multiple-band filling control inSrTiO3-based interfaciald-electron gases

“…Relying on the equivalence of the HLN and ILP models when only the k-cubic SOC is present, the HLN model has also been practically adopted to analyze the Rashba SOC in many two-dimensional systems 49,50 , although the Rashba SOC is generally related to the DP spin precession mechanism. Here we also analyze the data using the HLN model 48 , and the results reproduce that from the ILP fittings with r = 0.…”

Magnetoresistance Measurements of a Superconducting Surface State of In-Induced and Pb-Induced Structures on Si(111)

“…Using state-of-the-art techniques, it has now become possible to study the electronic transport phenomena in the surface states by conductivity measurements in ultrahigh vacuum [1][2][3][4][5][6] and describe the results from the band structures measured by angle-resolved photoemission spectroscopy [7]. Ultrathin metallic films grown on semiconductor substrates, especially superconducting ones, are also targets of active research of transport properties in relation to their structure and morphology [8][9][10][11][12][13][14][15][16]. However, there are no works that have performed magnetotransport measurements at subkelvin temperatures, which is likely needed to unravel the superconducting properties of surface superstructures.…”