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The promotion of collinear classical spin configurations as well as the enhanced tendency towards nearest-neighbor clustering of the quantum spins are typical features of the frustrating isotropic three-body exchange interactions in…

强关联电子 · 物理学 2016-05-16 N. B. Ivanov , S. I. Petrova , J. Schnack

By incorporating the nonempirical SCAN semilocal density functional [Sun, Ruzsinszky, and Perdew, Phys. Rev. Lett. 115, 036402 (2015)] in the underlying expression of four existing hybrid and double-hybrid models, we propose one hybrid…

化学物理 · 物理学 2016-02-05 Kerwin Hui , Jeng-Da Chai

We advance spin noise spectroscopy to an ultrafast tool to resolve high frequency spin dynamics in semiconductors. The optical non-demolition experiment reveals the genuine origin of the inhomogeneous spin dephasing in n-doped GaAs wafers…

介观与纳米尺度物理 · 物理学 2010-04-22 Georg M. Müller , Michael Römer , Jens Hübner , Michael Oestreich

Spin-bearing molecules can be stabilized on surfaces and in junctions with desirable properties such as a net spin that can be adjusted by external stimuli. Using scanning probes, initial and final spin states can be deduced from…

介观与纳米尺度物理 · 物理学 2016-12-16 Peter Jacobson , Matthias Muenks , Gennadii Laskin , Oleg O. Brovko , Valeri S. Stepanyuk , Markus Ternes , Klaus Kern

We investigate the possibility of the electrical control of spin transfer in monoatomic chains incorporating spin-impurities. Our theoretical framework is the mixed quantum-classical (Ehrenfest) description of the spin dynamics, in the…

介观与纳米尺度物理 · 物理学 2013-05-29 Anna Pertsova , Maria Stamenova , Stefano Sanvito

We present the calculation of the density matrix response function of the two-dimensional electron gas with Rashba spin-orbit interaction, which is applicable in a wide range of parameters covering the diffusive and non-diffusive, the dirty…

介观与纳米尺度物理 · 物理学 2009-11-11 M. Pletyukhov

The electronic structure of CrO_2 is critically discussed in terms of the relation of existing experimental data and well converged LSDA and GGA calculations of the electronic structure and transport properties of this half metal magnet,…

材料科学 · 物理学 2009-10-31 I. I. Mazin , D. J. Singh , Claudia Ambrosch-Draxl

The operation of HERA with polarized proton and electron beams will allow to study a wide variety of observables in polarized electron-proton collisions at $\sqrt s=300$ GeV. The physics prospects of this project have been elaborated in…

高能物理 - 唯象学 · 物理学 2007-05-23 A. De Roeck , T. Gehrmann

It is predicted that nuclear spin conversion in molecules can be efficiently controlled by strong laser radiation resonant to rovibrational molecular transition. The phenomenon can be used for substantial enrichment of spin isomers, or for…

化学物理 · 物理学 2009-11-06 P. L. Chapovsky

Inefficient screening of electric fields in nanoconductors makes electric manipulation of electronic transport in nanodevices possible. Accordingly, electrostatic (charge) gating is routinely used to affect and control the Coulomb…

介观与纳米尺度物理 · 物理学 2015-07-22 R. I. Shekhter , M. Jonson

We present an experimental arrangement that permits engineering of cavity back-action on a mesoscopic spin ensemble. By coupling a superconducting thin-film Nb microstrip resonator to a Trityl OX63 electron spin sample, we access different…

Temperature dependent nuclear inelastic-scattering (NIS) of synchrotron radiation was applied to investigate both spin states of the spin-crossover complex [Fe(tpa)(NCS)(2)] (tpa = tris(2-pyridylmethyl)amine). A remarkable increase of the…

化学物理 · 物理学 2012-06-29 H. Grünsteudel , H. Paulsen , H. Winkler , A. X. Trautwein , H. Toftlund

We take an approach to the Lambda non-mesonic weak decay in nuclei based on the exchange of mesons. The one pion and one kaon exchange are considered, together with the exchange of two pions, either correlated, leading to an important…

核理论 · 物理学 2009-11-07 D. Jido , E. Oset , J. E. Palomar

We present the derivation of an ab-initio and parameter free effective electron-electron interaction that goes beyond the screened RPA and accounts for superconducting pairing driven by spin-fluctuations. The construction is based on many…

超导电性 · 物理学 2015-06-23 F. Essenberger , A. Sanna , A. Linscheid , F. Tandetzky , G. Profeta , P. Cudazzo , E. K. U. Gross

Octahedral Fe$^{2+}$ molecules are particularly interesting as they often exhibit a spin-crossover transition. In spite of the many efforts aimed at assessing the performances of density functional theory for such systems, an…

材料科学 · 物理学 2015-06-05 A. Droghetti , D. Alfè , S. Sanvito

We evaluate the charge and longitudinal spin response functions of a two-dimensional electron gas with $e^2/r$ interactions in an arbitrary state of spin polarization, using a structurally self-consistent approach to treat exchange and…

强关联电子 · 物理学 2015-06-24 B. Davoudi , M. P. Tosi

We combine extensive precision measurements of the optically detected spin dynamics and magneto-transport measurements in a contiguous set of n-doped bulk GaAs structures in order to unambiguously unravel the intriguing but complex…

材料科学 · 物理学 2017-08-02 J. G. Lonnemann , E. P. Rugeramigabo , M. Oestreich , J. Hübner

Density functional theory (DFT) provides a theoretical framework for efficient and fairly accurate calculations of the electronic structure of molecules and crystals. The main features of density functional theory are described and DFT…

化学物理 · 物理学 2012-06-12 Hauke Paulsen , Alfred Xaver Trautwein

The charge and spin response of a spin--polarized electron gas is investigated including terms beyond the random phase approximation. We evaluate the charge response, the longitudinal and transverse spin response, and the mixed spin--charge…

凝聚态物理 · 物理学 2009-10-28 Kyung-Soo Yi , J. J. Quinn

The spin-conserving length-scale is a key parameter determining functionalities of a broad range of spintronic devices including magnetic multilayer spin-valves in the commercialized magnetic memories or lateral spin transistors in…

介观与纳米尺度物理 · 物理学 2016-05-16 L. Nádvorník , P. Němec , T. Janda , K. Olejník , V. Novák , V. Skoromets , H. Němec , P. Kužel , F. Trojánek , T. Jungwirth , J. Wunderlich