Transport of spin-polarized electrons in a magnetic superlattice

Liu, Junfeng; Deng, Wei; Xia, Ke; Zhang, Chaofeng; Ma, Zhongshui

doi:10.1103/physrevb.73.155309

Cited by 63 publications

(33 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This timing is consistent with many geological events: the slowdown of the northward drift of the Indian Plate (Klootwijk et al, 1992;Acton, 1999;Yin and Harrison, 2000), an increase in the sedimentary deposition rate in the western Qaidam Basin (Zhang, 2006), initiation of thrusting in the northern and southern margins of the Qaidam Basin (Yin et al, 2002), strong compression of the Qiman Tagh (Song and Wang, 1993;Liu et al, 1998), increased volcanic activities in the Tibetan Plateau since 51 Ma (Chung et al, 1998;Lai, 2000;Deng, 2000;Mo et al, 2003;Liu et al, 2004;Li et al, 2005), and formation of a series of Cenozoic basins within and near the edge of the Tibet Plateau (Liu et al, , 2001Zhao et al, 2000;Yue et al, 2000). Therefore, it is clear that the northern edge of the Tibetan Plateau has sensed the Indian-Eurasian plate's collision at the Late Eocene.…”

Section: Discussionmentioning

confidence: 97%

Cenozoic tectonic evolution in the western Qaidam Basin inferred from subsurface data

et al. 2010

View full text Add to dashboard Cite

It is an agreement that collision of Indian and Asian plates causes uplift of the Tibet Plateau. However, great controversy exists about uplifting history and mechanisms of the Tibetan Plateau. Uplift history of the Tibetan Plateau has been well recorded in the Qaidam Basin, located in the northern margin of the Tibet Plateau. In this paper, we recognize and classify faults recorded by subsurface seismic data in the western Qaidam Basin. In addition, we reconstruct the Cenozoic deformation history of the Qaidam Basin based on balanced section of 5 seismic profiles. The results indicates that 1) Faults in the western Qaidam Basin can be classified as growth faults and non-growth faults, and the growth faults could be divided into three subcategories. 2) According to timing and manner of fault activities, faults and strata in the western Qaidam Basin could be divided into two structural layers: the lower (Lulehe Fm-Xia Youshashan Fm) and the upper (Shang Youshashan Fm-Qigequan Fm) layer. 3) The western Qaidam Basin has experienced two intensive tectonic deformations: the first phase occurs at 43.8−22 Ma (Middle Eocene− Early Miocene), which reached peak at 31.5 Ma (Early Oligocene); the second phase occurred between 14.9 and 0 Ma (Middle Miocene−Present), and the second phase is stronger than the first phase. Recognizing early fault activities confirm previous results that northern Tibet has sensed collision between the India and the Asia shortly after the collision. However, our results here emphasize that the northern Tibet has experienced another phase of shortening and uplift in the late Neogene. It was the two-stage tectonic activities that work together to produce the current Tibetan Plateau.

show abstract

Section: Discussionmentioning

confidence: 97%

Cenozoic tectonic evolution in the western Qaidam Basin inferred from subsurface data

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Those studies included the effect of dimensionality and features of the band-gap structures of a gas in a superimposed periodic and arbitrary confining potentials [23], ballistic transport of electrons in periodic magnetic field [24,25], switching controlled by SO coupling [26], and quantum wire superlattices [27]. It was shown that SO coupling induced by an external periodic field leads to the appearance of new gaps, making the electronic system tunable even in the condensed matter settings.…”

mentioning

confidence: 99%

Gap Solitons in a Spin-Orbit-Coupled Bose-Einstein Condensate

2013

View full text Add to dashboard Cite

We report a diversity of stable gap solitons in a spin-orbit coupled Bose-Einstein condensate subject to a spatially periodic Zeeman field. It is shown that the solitons, can be classified by the main physical symmetries they obey, i.e. symmetries with respect to parity (P), time (T), and internal degree of freedom, i.e. spin, (C) inversions. The conventional gap and gap-stripe solitons are obtained in lattices with different parameters. It is shown that solitons of the same type but obeying different symmetries can exist in the same lattice at different spatial locations. PT and CPT symmetric solitons have anti-ferromagnetic structure and are characterized respectively by nonzero and zero total magnetizations. The progressively growing interest in the physics of mixtures of spinor Bose-Einstein condensates (BECs) and in particular in spin-orbit (SO) coupled BECs (SOBECs) [1,2], is motivated on the one hand by their fundamental importance for the atomic physics, and on the other hand by the rich possibilities they offer for emulating synthetic electric and magnetic fields in solids [3]. The last property allows one using neutral atoms to simulate numerous condensed matter phenomena [4] in a tunable way, what would be impossible in direct condensed matter experiments. In other words, a spinor BEC is a promising candidate for implementation of a quantum simulator, which due to the technologies available nowadays was already implemented using cold atoms [5], ions [6], or photonics [7]. In particular, we mention a recent experiment [8] with coupled (linear) arrays of optical waveguides simulating a discrete version of SO-coupling which in the present letter is considered for the matter waves.Meanwhile, the physics of BECs is characterized by two essential factors, which are not typical for the physics which is aimed to be simulated. First, a BEC is a nonlinear system, with the nonlinearity stemming from the twobody interactions [9]. Moreover, by changing the configuration of the system (i.e. of the laser beams) one can create effective nonlinear interactions of different types [10]. Respectively, such nonlinear objects as skyrmions [11], solitons [12,13], anti-ferromagnetic structures and symmetry breaking [14], have been recently reported for SOBECs. The second feature, is that a (quasi-) stationary state of the condensate requires the presence of the external potential. This, in particular, imposes constraints on the lower bound of the kinetic energy, what is particularly relevant for SO-BECs (see e.g. [14]). What concerns the external potentials, since the very first experiments with cold atoms loaded in optical lattices [15] it was widely recognized that lattices (i.e. periodic potentials) are particularly efficient in manipulating BECs [16]. Nowadays, the nonlinear properties of the atomic BECs held in optical lattices, described in the mean-field approximation are very well studied [17] (see also [18] for a brief review on BEC mixtures in optical lattices). It is therefore natural that studies of SO-BECs in pe...

show abstract

“…Many interesting phenomena have been studied recently, including Hall effect [1], spin transport [2], and plasmon excitations [3]. Furthermore, achieving spin polarised current in a practical device can have potential applications in quantum computers and information processing [4], spin-transistors [5] spin-waveguides [6], spin-filters [7].…”

mentioning

confidence: 99%

Spin Josephson effect in spintronic nanostructures

Zhang

2007

Phys. Status Solidi (c)

Self Cite

View full text Add to dashboard Cite

The problem of spin current across a ferromagnetic/normal metal/ferromagnetic junction is formulated. It is shown that the spin current is controlled by the phase difference across the junction. Under zero bias, J A system which is of particular interest in fundamental physics and device applications is a structure where the left and right ferromagnetic leads are separated by a nonmagnetic barrier, or an FNF junction. Since a polarised spin state has a well-defined amplitude and phase, one can immediately draw straightforward analogies between the relevant quantities in an FNF junction for spin transport and a superconducting/insulator/superconductor (SIS) junction for charge transport [8]. In a recent work [9] such direct analogies were used to derive a spin current in the form similar to the super-current across an SIS junction, J

show abstract

Transport of spin-polarized electrons in a magnetic superlattice

Cited by 63 publications

References 35 publications

Cenozoic tectonic evolution in the western Qaidam Basin inferred from subsurface data

Cenozoic tectonic evolution in the western Qaidam Basin inferred from subsurface data

Gap Solitons in a Spin-Orbit-Coupled Bose-Einstein Condensate

Spin Josephson effect in spintronic nanostructures

Contact Info

Product

Resources

About