Decay angular distributions of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup></mml:math>
 and 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>D</mml:mi><mml:mo>*</mml:mo></mml:msup></mml:math>
 vector mesons in pion-nucleon scattering

Kim, Sang-Ho; Oh, Yongseok; Титов, А. И.

doi:10.1103/physrevc.95.055206

Cited by 9 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1(c)). To explain the peak in the spin signal around T ≈30 K, different mechanism including surface scattering [39,[42][43][44], magnetic impurities in bulk Cu or the vicinity of the Py/Cu interface [45][46][47][48][49][50][51], or changes in spin polarization of Cu/Py interface [52] have been proposed. The existence of a small fraction (parts per million) of magnetic impurities in bulk Cu is believed to cause s − d spin-flip scattering associated with the Kondo effect, which leads to a suppression of the spindiffusion length at low temperatures.…”

Section: Discussionmentioning

confidence: 99%

Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents

et al. 2018

View full text Add to dashboard Cite

At the interface between a nonmagnetic metal (NM) and a ferromagnetic insulator (FI) spin current can interact with the magnetization, leading to a modulation of the spin current. The interfacial exchange field at these FI-NM interfaces can be probed by placing the interface in contact with the spin transport channel of a lateral spin valve (LSV) device and observing additional spin relaxation processes. We study interfacial exchange field in lateral spin valve devices where Cu spin transport channel is in proximity with ferromagnetic insulator EuS (EuS-LSV) and yttrium iron garnet Y3Fe5O12 (YIG-LSV). The spin signals were compared with reference lateral spin valve devices fabricated on nonmagnetic Si/SiO2 substrate with MgO or AlOx capping. The nonlocal spin valve signal is about 4 and 6 times lower in the EuS-LSV and YIG-LSV, respectively. The suppression in the spin signal has been attributed to enhanced surface spin-flip probability at the Cu-EuS (or Cu-YIG) interface due to interfacial spin-orbit field. Besides spin signal suppression we also found widely observed low temperature peak in the spin signal at T ∼30 K is shifted to higher temperature in the case of devices in contact with EuS or YIG. Temperature dependence of spin signal for different injector-detector distances reveal fluctuating exchange field at these interfaces cause additional spin decoherence which limit spin relaxation time in addition to conventional sources of spin relaxation. Our results show that temperature dependent measurement with pure spin current can be used to probe interfacial exchange field at the ferromagnetic insulator-nonmagnetic metal interface.

show abstract

Section: Discussionmentioning

confidence: 99%

Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents

et al. 2018

View full text Add to dashboard Cite

show abstract

“…3) on Py/Ti, Py/Cu, and Py/Pt. While the dc-biased ST-FMR technique [12,20,21,24] enables straightforward quantitative analysis of the current-induced field (and damping-like SOT), our ST-FMR setup did not yield a sufficient signal-to-noise ratio for reliable measurement of resonance field vs dc current. Nevertheless, the ST-FMR spectral shape can qualitatively reveal the types of SOTs present (or absent) in the stack structures [18,20] as discussed in the following.…”

Section: (Bc) the Direction Ofmentioning

confidence: 99%

Current-induced spin–orbit field in permalloy interfaced with ultrathin Ti and Cu

Greening

Smith

Lim

et al. 2020

Applied Physics Letters

View full text Add to dashboard Cite

How spin-orbit torques emerge from materials with weak spin-orbit coupling (e.g., light metals) is an open question in spintronics. Here, we report on a field-like spin-orbit torque (i.e., in-plane spin-orbit field transverse to the current axis) in SiO2-sandwiched permalloy (Py), with the top Py-SiO2 interface incorporating ultrathin Ti or Cu. In both SiO2/Py/Ti/SiO2 and SiO2/Py/Cu/SiO2, this spin-orbit field opposes the classical Oersted field. While the magnitude of the spin-orbit field is at least a factor of 3 greater than the Oersted field, we do not observe evidence for a significant damping-like torque in SiO2/Py/Ti/SiO2 or SiO2/Py/Cu/SiO2. Our findings point to contributions from a Rashba-Edelstein effect or spin-orbit precession at the (Ti, Cu)-inserted interface.2 An electric current in a material with spin-orbit coupling generally gives rise to a non-equilibrium spin accumulation [1-6], which can then exert torquesi.e., spin-orbit torques (SOTs)on magnetization in an adjacent magnetic medium [7][8][9]. SOTs are often classified into two symmetries: damping-like SOT that either counters or enhances magnetic relaxation, and field-like SOT (or "spin-orbit field") that acts similarly to a magnetic field. Next generations of nanomagnetic computing devices may benefit from an improved understanding of mechanisms for SOTs and the discovery of new thin-film systems enabling large SOTs.While most efforts have focused on conductors known for strong spin-orbit coupling (e.g., 5d transition metals, topological insulators, etc.) [7,8], recent reports have shown SOTs in ferromagnets interfaced with materials that are not expected to exhibit significant spin-orbit coupling [10][11][12][13][14]. For example, a large damping-like SOT has been reported in ferromagnetic Ni80Fe20 (permalloy, Py) interfaced with partially oxidized Cu [10,11]; quantum-interference transport measurements have revealed that Cu with an oxidation gradient can, in fact, exhibit enhanced spin-orbit coupling comparable to that in heavier metals (e.g., Au) [15]. As another example of SOTs that emerge by incorporating seemingly weak spin-orbit materials, Py interfaced with a Ti seed layer and Al2O3 capping layer exhibits a sizable field-like SOT [12]. The key observed features of this spin-orbit field in Ti/Py/Al2O3 [12] are: (1) it points in-plane and transverse to the current axis, irrespective of the magnetization orientation in Py; (2) its magnitude scales inversely with the Py thickness, i.e., it is interfacial in origin; (3) it is modified significantly by the addition of an insertion layer (e.g., Cu) at the Py-Al2O3 interface. Ref. [12] claims that this spin-orbit field is governed by a Rashba-Edelstein effect (REE) [1,5,16,17] at the Py/Al2O3 and Cu/Al2O3 interfaces. However, the complicated stack structures of SiO2(substrate)/Ti/Py/(Cu/)Al2O3 with multiple dissimilar interfaces in Ref.[12] obscure the mechanisms of the spin-orbit field, particularly the roles played by the Ti and Cu layers.Here, by using simpler stack structures, we gain i...

show abstract

“…It represents the wave-functional associated with the first excited state of E Θ [7], and a generic excited state of E R . As a matter of completeness we would like to mention the reference [31], where the functional Schrödinger representation was first applied to the study of O(N) nonlinear sigma models. We may identify two main differences between [31] and the present work.…”

Section: )mentioning

confidence: 99%

Non-Abelian BFFT embedding, Schrödinger quantization and the field–antifield anomaly of the O(N) nonlinear sigma model

Abreu

Neto

Mendes

et al. 2016

Int. J. Mod. Phys. A

View full text Add to dashboard Cite

We embed the O(N ) nonlinear sigma model in a non-Abelian gauge theory. As a first class system, it is quantized using two different approaches: the functional Schrödinger method and the non-local field-antifield procedure. Firstly, the quantization is performed with the functional Schrödinger method, for N = 2, obtaining the wave functionals for the ground and excited states. In the second place, using the BV formalism we compute the one-loop anomaly. This important result shows that the classical gauge symmetries, appearing due to the conversion via BFFT method, are broken at the quantum level.

show abstract

Decay angular distributions of K* and D* vector mesons in pion-nucleon scattering

Cited by 9 publications

References 24 publications

Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents

Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents

Current-induced spin–orbit field in permalloy interfaced with ultrathin Ti and Cu

Non-Abelian BFFT embedding, Schrödinger quantization and the field–antifield anomaly of the O(N) nonlinear sigma model

Contact Info

Product

Resources

About