Spin correlations in quantum wires

Sun, Chen; Pokrovsky, V. L.

doi:10.1103/physrevb.91.161305

Cited by 21 publications

(27 citation statements)

References 22 publications

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“…Bright soliton and RW were studied for the model that nonlinear coefficients and pair-transition coefficients are different [29,30]. The RW excitation dynamics on a plane wave background have been discussed well [27,31].…”

Section: The Coupled Nonlinear Schrödinger Equations With Particlmentioning

confidence: 99%

“…Therefore, we consider that the case for second-order transition is dominant, for which the dynamical equation can be written as an integrable coupled nonlinear Schrödinger equation with pair transition coupling effects (CNLS-p) [27]. Some types of nonlinear excitations for similar integrable model have been obtained based on special Hirota bilinearization and the Darboux transformation (DT) [28], such as bright soliton [29], RW [30]. Furthermore, we presented two Darboux transformation forms for deriving nonlinear localized wave solutions [31].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of rogue wave excitation pattern on stripe phase backgrounds in a two-component Bose-Einstein condensate

Zhao

Ling

et al. 2017

Communications in Nonlinear Science and Numerical Simulation

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We study rogue wave excitation pattern in a two-component Bose-Einstein condensate with pairtransition effects. The results indicate that rogue wave excitation can exist on a stripe phase background for which there are cosine and sine wave background in the two components respectively. The rogue wave peak can be much lower than the ones of scalar matter wave rogue waves, and varies with the wave period changing. Both rogue wave pattern and rogue wave number on temporal-spatial plane are much more abundant than the ones reported before. Furthermore, we prove that the rogue wave number can be n(n + 1)/2 + m(m + 1)/2 (where m, n are arbitrary non-negative integers), in contrast to n(n + 1)/2 for scalar nonlinear Schrödinger equation described systems. These results would enrich our knowledge on nonlinear excitations in multi-component Bose-Einstein condensate with transition coupling effects.

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Section: The Coupled Nonlinear Schrödinger Equations With Particlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics of rogue wave excitation pattern on stripe phase backgrounds in a two-component Bose-Einstein condensate

Zhao

Ling

et al. 2017

Communications in Nonlinear Science and Numerical Simulation

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“…It also causes an apparent 4th order magnetic anisotropy. [24,25] It has also recently been related to the observed size and RA dependence of STT-switching threshold in p-MTJ that are clearly non-macrospin in nature. [26] In this work, we investigate the switching statistics and real-time dynamics of an p-MTJ as they depend on writevoltage and external bias magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Interface moment dynamics and its contribution to spin-transfer torque switching process in magnetic tunnel junctions

Safranski¹,

Sun²

2019

Phys. Rev. B

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A practical problem for memory applications involving perpendicularly magnetized magnetic tunnel junctions is the reliability of switching characteristics at high-bias voltage. Often it has been observed that at high-bias, additional error processes are present that cause a decrease in switching probability upon further increase of bias voltage. We identify the main cause of such error-rise process through examination of switching statistics as a function of bias voltage and applied field, and the junction switching dynamics in real time. These experiments show a coincidental onset of error-rise and the presence of a new low-frequency microwave emission well below that dictated by the anisotropy field. We show that in a few-macrospin coupled numerical model, this is consistent with an interface region with concentrated perpendicular anisotropy, and where the magnetic moment has limited exchange coupling to the rest of the layers. These results point to the important role high-frequency interface magnetic moment dynamics play in determining the switching characteristics of these tunnel junction devices.

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“…Interplay of the polarization and the interfacial field may lead to marked anisotropy in the junction electrical conductance 32 and Josephson current 33 . Interfacial spin-orbit field, especially Rashba spin-orbit field 34,35 arising due to the confinement potential at the semiconductor or superconductor hybrid structure, can also be the key ingredient behind such spin manipulation 36 .…”

Section: Arxiv:161100353v3 [Cond-matmes-hall] 6 Sep 2017mentioning

confidence: 99%

Thermoelectric properties of a ferromagnet-superconductor hybrid junction: Role of interfacial Rashba spin-orbit interaction

2017

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We investigate thermoelectric properties of a ferromagnet-superconductor hybrid structure with Rashba spin-orbit interaction and delta function potential barrier at the interfacial layer. The exponential rise of thermal conductance with temperature manifests a cross-over temperature scale separating two opposite behaviors of it with the change of polarization in the ferromagnet whereas the inclusion of interfacial Rashba spin-orbit field results in a non-monotonic behavior of it with the strength of Rashba field. We employ scattering matrix approach to determine the amplitudes of all the scattering processes possible at the interface to explain the thermoelectric properties of the device. We examine Seebeck effect and show that higher thermopower can be achieved when the polarization of the ferromagnet tends towards the half-metallic limit. It can be enhanced even for lower polarization in presence of the finite potential barrier. In presence of interfacial Rashba spinorbit interaction, Seebeck coefficient rises with the increase of barrier strength and polarization at weak or moderate interfacial Rashba field. From the application perspective, we compute the figure of merit and show that zT ∼ 4 − 5 with higher polarization of the ferromagnet both in absence and presence of weak or moderate Rashba spin-orbit interaction along with the scalar potential barrier.

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Spin correlations in quantum wires

Cited by 21 publications

References 22 publications

Dynamics of rogue wave excitation pattern on stripe phase backgrounds in a two-component Bose-Einstein condensate

Dynamics of rogue wave excitation pattern on stripe phase backgrounds in a two-component Bose-Einstein condensate

Interface moment dynamics and its contribution to spin-transfer torque switching process in magnetic tunnel junctions

Thermoelectric properties of a ferromagnet-superconductor hybrid junction: Role of interfacial Rashba spin-orbit interaction

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