Energy- and Momentum-Resolved Exchange and Spin-Orbit Interaction in Cobalt Film by Spin-Polarized Two-Electron Spectroscopy

Samarin, Sergey; Artamonov, O.M.; Sergeant, Anthony; Stamps, R. L.; Williams, James

doi:10.1103/physrevlett.97.096402

Cited by 15 publications

(18 citation statements)

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“…[7][8][9][10][11][12][13] For low energies the mechanisms of electron-electron collisions at surfaces can be studied. [14][15][16][17][18] Further studies revealed the role of the surface dielectric response on the correlated pair emission. [19][20][21][22] For a fast incoming electron (>100 eV) and a small energy and momentum loss (i.e., for a small momentum transfer) of this electron the pair-correlation technique delivers related spectroscopic information as done by the angle-resolved photoemission spectroscopy (ARPES) 23,24 (using linearly polarized photons).…”

Section: Introductionmentioning

confidence: 98%

Electron pair emission from a highly correlated material

Schumann

Behnke

et al. 2012

Phys. Rev. B

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Electron pair emission spectroscopy (e,2e) is a tool well suited to probe the electron correlations. The probability of the electron pair emission depends in a crucial way on the localization properties of the electron wave functions describing the initial state of the system. One expects an enhanced coincidence signal from the localized electron states in oxides compared to that of itinerant states in metals. Our comparative (e,2e) study of the Ag(001) and NiO/Ag(001) system confirms this observation. We demonstrate that the intensity of the pair emission increases by an order of magnitude after the deposition of 15 monolayers of NiO onto the Ag(001) substrate.

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Section: Introductionmentioning

confidence: 98%

Electron pair emission from a highly correlated material

Schumann

Behnke

et al. 2012

Phys. Rev. B

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“…Moreover, the analysis of k x -distributions (k x -parallel to the surface and to the scattering plane component of the bound electron wave vector) recorded for two opposite magnetizations of the sample (Fig. 3, right panel), provides the information on energy-and momentum -resolved exchange and spin-orbit contribution to the measured asymmetry [11].…”

Section: Exchange and Spin-orbit Interaction In A Ferromagnetic Layermentioning

confidence: 99%

Low-energy spin-polarized two-electron spectroscopy: a powerful tool for studying exchange correlation and spin-orbit interaction on surfaces

Samarin

Artamonov

Sergeant

et al. 2008

J. Phys.: Conf. Ser.

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Spin-polarized two-electron spectroscopy-in-reflection has been proven to be a very efficient technique for studying the exchange correlation and spin-orbit interaction on magnetic and non-magnetic surfaces and thin ferromagnetic films. The essence of the technique is the detection of two time-correlated electrons emitted from the sample surface upon an impact of a single incident electron and measurements of their momenta. The coincidence technique has been combined with a time-of-flight electron energy analysis to measure momentum distributions of correlated electron pairs for various orientations of the electron beam polarization relative to the scattering plane and magnetization of the sample. This set of measurements allows to extract the information on exchange correlation and spin-orbit interaction from measured spectra. Energy-and momentum-conservation in the electron-electron scattering allows the valence electron involved into collision to be located in the energy-momentum space of the valence band of the sample. In this way the energy and momentum location of the exchange and SOI can be established. A few examples of the application of this technique for studying ferromagnetic and non-magnetic surfaces are presented.

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“…It presents the advantage of a room temperature control of nucleation and growth modes by fine adjustment of the potential and by the appropriate choice of the solution chemistry [6,7]. Cobalt is one of the key materials used in high-density data storage and giant magnetoresistance devices due to its large magnetic anisotropy energy and high Curie temperature [8,9]. Copper has received much attention in surface electrochemistry in the past decade because of its increasing applications as the novel material in chip production [10][11][12].…”

Section: Introductionmentioning

confidence: 99%