Observation of the D’yakonov-Perel’ Spin Relaxation in Single-Crystalline Pt Thin Films

Abstract

The spin relaxation mechanism in single-crystalline and polycrystalline platinum (Pt) thin films is revealed by a quantum interference effect. Examining the relationship between the spin relaxation rate and momentum scattering rate by changing Pt thickness, we find that the spin relaxation rate of Pt strongly depends on both crystal structure and thickness even though the quality of material (Pt) is unchanged. In particular, the D'yakonov-Perel' mechanism is considered as a dominant mechanism under cases where scattering events are suppressed or the interface effect is not negligible.

Photoproduction of Λ*(1405) with the N* and the Kim1, Nam2, Kim3 2017Phys. Rev. D

“…From this observation, we find that the interference between the Λ * and other vector-meson productions, such as K * , on the Dalitz plot is practically small as given in Ref. [58]. In the low-energy region for W ≤ 2.2 GeV, being similar to the total and differential cross sections as shown in Figs.…”

“…Interestingly, in Ref. [58], it was found experimentally that the interference between the different resonant productions is almost negligible, although they focused on the different reactions process, i.e., γp → K + K − p. Hence, considering these observations, conditions (1) and (2) can be justified rather safely here, and we can use Eq. (20) for computing the Dalitz process with the two-body cross section, which is computed by Eqs.…”

Strong spin-orbit fields and Dyakonov-Perel spin dephasing in supported metallic films

“…Our theory is corroborated by recent experiments in ultrathin films [20,21]. We propose that an experiment to verify our predictions can be based on laser-pulse, pumpprobe experiments (probing the Faraday or Kerr rotation) with femtosecond temporal resolution in films of varying thickness [40,41].…”

“…The DP mechanism (that we briefly describe below) is known to be important in III-V or II-VI semiconductors or semiconductor heterostructures due to their inversion asymmetry [18,19], but, to our knowledge, it has been largely overlooked so far in the important case of supported films or metallic bilayers, which show manifestly no inversion symmetry. Only recently, data from spin-pumping [20] and weak antilocalization [21] experiments in ultrathin films were found to fit the DP and not the EY mechanism.Characteristic of systems with spin-orbit coupling and timereversal symmetry but broken inversion symmetry is the lifting of conjugation degeneracy [11] at each crystal momentum k and energy E k of the band structure. The resulting pair of states …”

Interference Effect between \(\phi \) and \(\Lambda \)(1520) Production Channels in the \(\gamma \)p\( \to \)K+K−pReaction

“…The fits with Monte-Carlo lineshapes were based on the events beyond the ϕ-Λ(1520) interference region in which the two resonances appear. The fit results were then interpolated into the interference region, keeping the magnitudes of Monte-Carlo lineshapes as determined from the fit [13]. This simultaneous fit with Monte-Carlo lineshapes is a self-consistent method to reproduce the measured K + K − and K − p mass spectra, which pertains to the further study of interference effects.…”