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We investigate theoretically spin and orbital pseudospin magnetic properties of a molecular orbital in parabolic and elliptic double quantum dots (DQDs). In our many body calculation we include intra- and inter-dot electron-electron…

介观与纳米尺度物理 · 物理学 2009-11-11 Sooa Park , S. -R. Eric Yang

Recent developments in attosecond spectroscopy yield access to the correlated motion of electrons on their intrinsic time scales. Spin-flip dynamics is usually considered in the context of valence electronic states, where spin-orbit…

原子与分子团簇 · 物理学 2017-08-02 H. Wang , S. I. Bokarev , S. G. Aziz , O. Kühn

We use polarized neutron scattering to demonstrate that in-plane spin excitations in electron doped superconducting BaFe1.904Ni0.096As2 (Tc=19.8 K) change from isotropic to anisotropic in the tetragonal phase well above the…

We investigate phonon-induced spin and charge relaxation mediated by spin-orbit and hyperfine interactions for a single electron confined within a double quantum dot. A simple toy model incorporating both direct decay to the ground state of…

介观与纳米尺度物理 · 物理学 2014-07-04 V. Srinivasa , K. C. Nowack , M. Shafiei , L. M. K. Vandersypen , J. M. Taylor

We report electronic control and measurement of an imbalance between spin-up and spin-down electrons in micron-scale open quantum dots. Spin injection and detection was achieved with quantum point contacts tuned to have spin-selective…

介观与纳米尺度物理 · 物理学 2009-11-13 E. J. Koop , B. J. van Wees , D. Reuter , A. D. Wieck , C. H. van der Wal

Mechanisms of 'environmental decoherence' such as surface scattering, Elliot-Yafet process and precession mechanisms, as well as their influence on the spin phase relaxation are considered and compared. It is shown that the 'spin ballistic'…

介观与纳米尺度物理 · 物理学 2009-11-13 I. Tralle , W. Pasko

We study spin relaxation and decoherence caused by electron-lattice and spin-orbit interaction and predict striking effects induced by magnetic fields $B$. For particular values of $B$, destructive interference occurs resulting in ultralong…

介观与纳米尺度物理 · 物理学 2008-06-04 Denis V. Bulaev , Bjoern Trauzettel , Daniel Loss

Spin relaxation can be greatly enhanced in narrow channels of two-dimensional electron gas due to ballistic spin resonance, which is mediated by spin-orbit interaction for trajectories that bounce rapidly between channel walls. The channel…

介观与纳米尺度物理 · 物理学 2010-09-30 W. W. Yu , S. M. Frolov , S. Luescher , J. A. Folk , W. Wegscheider

Influence of resonant oscillating electromagnetic field on a single electron in coupled lateral quantum dots in the presence of phonon-induced relaxation and decoherence is investigated. Using symmetry arguments it is shown that spin and…

介观与纳米尺度物理 · 物理学 2013-05-29 Peter Stano , Jaroslav Fabian

An unexpected finding two decades ago demonstrated that Shockley electron states in noble metal surfaces are spin-polarized, forming a circulating spin texture in reciprocal space. The fundamental role played by the spin degree of freedom…

其他凝聚态物理 · 物理学 2020-01-24 Idoia G. Gurtubay , Aitzol Iturbe-Beristain , Asier Eiguren

Here, we study diffusive spin transport in two dimensions and demonstrate that an intrinsic analog to a previously predicted extrinsic spin swapping effect, where the spin polarization and the direction of flow are interchanged due to…

介观与纳米尺度物理 · 物理学 2015-03-19 Severin Sadjina , Arne Brataas , A. G. Mal'shukov

We consider relaxation of an electron spin in a nanotube quantum dot due to its coupling to flexural phonon modes, and identify a new spin-orbit mediated coupling between the nanotube deflection and the electron spin. This mechanism…

介观与纳米尺度物理 · 物理学 2015-03-13 Mark S. Rudner , Emmanuel I. Rashba

We present a symmetry analysis of electronic bandstructure including spin-orbit interaction close to the insulating gap edge in monolayer black phosphorus ('phosphorene'). Expressions for energy dispersion relation and spin-dependent…

材料科学 · 物理学 2014-10-03 Pengke Li , Ian Appelbaum

In most existing theories for iron-based superconductors, spin-orbit coupling (SOC) has been assumed insignificant. Even though recent experiments have revealed an influence of SOC on the electronic band structure, whether SOC fundamentally…

超导电性 · 物理学 2017-05-23 Mingwei Ma , Philippe Bourges , Yvan Sidis , Yang Xu , Shiyan Li , Biaoyan Hu , Jiarui Li , Fa Wang , Yuan Li

We investigate the intrinsic spin dynamics of electrons bound to Al impurities in bulk ZnO by optical spin noise spectroscopy. Spin noise spectroscopy enables us to investigate the longitudinal and transverse spin relaxation time with…

介观与纳米尺度物理 · 物理学 2015-06-11 H. Horn , A. Balocchi , X. Marie , A. Bakin , A. Waag , M. Oestreich , J. Hübner

We investigate spin dynamics in antiferromagnetic (AF) molecular rings at finite temperature in the presence of spin-phonon (s-p) interaction. We derive a general expression for the spin susceptibility in the weak s-p coupling limit and…

介观与纳米尺度物理 · 物理学 2009-11-11 Leonardo Spanu , Alberto Parola

Spintronics in halide perovskites has drawn significant attention in recent years, due to highly tunable spin-orbit fields and intriguing interplay with lattice symmetry. Spin lifetime -- a key parameter that determines the applicability of…

The development of energy-efficient spin-based hybrid devices that can perform functions such as logic, communication, and storage requires the ability to control and transport highly polarized spin currents over long distances in…

介观与纳米尺度物理 · 物理学 2025-02-21 Jiawei Liu , Deyi Fu , Tingyu Qu , Deqiang Zhang , Kenji Watanabe , Takashi Taniguchi , Ahmet Avsar , Barbaros Ozyilmaz

We investigate ultrafast demagnetization due to electron-phonon interaction in a model band-ferromagnet. We show that the microscopic mechanism behind the spin dynamics due to electron-phonon interaction is the interplay of scattering and…

材料科学 · 物理学 2017-10-25 Kai Leckron , Svenja Vollmar , Hans Christian Schneider

We introduce a theoretical framework for computaions of anisotropic multipolar exchange interactions found in many spin--orbit coupled magnetic systems and propose a method to extract these coupling constants using a density functional…

强关联电子 · 物理学 2014-08-01 Shu-Ting Pi , Ravindra Nanguneri , Sergey Savrasov
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