Experimental Spin Ratchet

  title={Experimental Spin Ratchet},
  author={Marius V. Costache and Sergio O. Valenzuela},
  pages={1645 - 1648}
Spin Control Controlling and manipulating the spin of an electron is a central requirement for applications in spintronics. Some of the challenges researchers are facing include efficient creation of spin currents, minimization of Joule heating, and extending the lifetime of electronic spins, which is especially important for quantum information applications. Costache and Valenzuela (p. 1645) address the first challenge by designing and fabricating an efficient and simple superconducting-based… Expand

Topics from this paper

Magnon-drag thermopile.
Measurements as a function of temperature reveal the effect on magnon drag following a variation of magnon and phonon populations, crucial to understand the physics of electron-magnon interactions, magnon dynamics and thermal spin transport. Expand
Magnetic quantum ratchet effect in graphene.
The measurable orbital effects in the presence of an in-plane magnetic field provide strong evidence for the existence of structure inversion asymmetry in graphene, proving the underlying spatial asymmetry. Expand
2 6 M ar 2 01 2 Magnon-drag thermopile
Thermoelectric effects in spintronics [1] are gathering increasing attention as a means of managing heat in nanoscale structures and of controlling spin information by using heat flow [2–10]. ThermalExpand
Magnon-drag thermopile
Spin related effects have been intensively studied using electrical transport methods, by measuring the spin diffusing length in metals and semiconductors. In addition to electrical transport, theExpand
Topologically protected superconducting ratchet effect generated by spin-ice nanomagnets.
A robust superconducting ratchet device based on topologically frustrated spin ice nanomagnets that generates a unidirectional net vortex flow independent of the distribution of magnetic charges in the array. Expand
Magnetic quantum ratchet effect in graphene
We report on the observation of magnetic quantum ratchet (MQR) effect induced by electric field of terahertz radiation in single-layer graphene samples subjected to an inplane magnetic field. We showExpand
Electron ratchets: State of the field and future challenges.
This perspective reviews the progress that was made in the field starting from the first experimental electron ratchets in the late 1990s, and how the field spawned multiple designs with very different properties, and argues that a system level perspective would be beneficial over reductionism. Expand
Dynamics and Fluctuations in Single-Electron Tunneling Devices
In recent years, it has been routinely achieved to build nanoscale electronic devices, which generate current pulses carrying only a single elementary charge. Realizations of these single-electronExpand
Phonon-induced quantum ratchet in the exciton spin dynamics in diluted magnetic semiconductors in a magnetic field
Magnetically doped semiconductors are well known for their giant Zeeman splittings which can reach several meV even in relatively small external magnetic fields. After preparing a nonequilibriumExpand
Quantum transport in Rashba spin-orbit materials: a review.
In this review article we describe spin-dependent transport in materials with spin-orbit interaction of Rashba type. We mainly focus on semiconductor heterostructures, however we consider topologicalExpand


Direct electronic measurement of the spin Hall effect
Electrical measurements of the spin Hall effect in a diffusive metallic conductor are reported, using a ferromagnetic electrode in combination with a tunnel barrier to inject a spin-polarized current to reveal opportunities for efficient spin detection without the need for magnetic materials. Expand
Electrical detection of spin precession in a metallic mesoscopic spin valve
It is shown that the spin direction can be controlled by inducing a coherent spin precession caused by an applied perpendicular magnetic field, and the output voltage of the device is sensitive to the spin degree of freedom only. Expand
Spintronics: Fundamentals and applications
Spintronics, or spin electronics, involves the study of active control and manipulation of spin degrees of freedom in solid-state systems. This article reviews the current status of this subject,Expand
Nonlocal Electronic Spin Detection, Spin Accumulation and the Spin Hall effect
In recent years, electrical spin injection and detection has grown into a lively area of research in the field of spintronics. Spin injection into a paramagnetic material is usually achieved by meansExpand
Electrical detection of spin currents: The spin-current induced Hall effect (invited)
We demonstrate electrical detection of spin currents in metallic nanostructures. In a conductor with nonzero spin-orbit coupling, a spin current is predicted in a direction perpendicular to theExpand
Resonant-tunneling–based spin ratchets
We outline a generic ratchet mechanism for creating directed spin-polarized currents in ac-driven double-well or double-dot structures by employing resonant spin transfer through the systemExpand
Zeeman ratchets: pure spin current generation in mesoscopic conductors with non-uniform magnetic fields
We consider the possibility to employ a quantum wire realized in a two-dimensional electron gas (2DEG) as a spin ratchet. We show that a net spin current without accompanying net charge transport canExpand
Interfacial charge-spin coupling: Injection and detection of spin magnetization in metals.
  • Johnson, Silsbee
  • Materials Science, Medicine
  • Physical review letters
  • 1985
Application of small static magnetic fields results in a Hanle effect which permits determination of the spin-relaxation time, and the unique features of the method should make it applicable to a wide range of studies. Expand
Tunneling spectroscopy for ferromagnet/superconductor junctions
In tunneling spectroscopy studies of ferromagnet/superconductor (F/S) junctions, the effects of spin polarization, Fermi wave-vector mismatch (FWM) between the F and S regions, and interfacialExpand
Quantum dissipative Rashba spin ratchets.
Under a finite coupling strength between the orbital degrees of freedom the electron dynamics at low temperatures exhibits a pure spin ratchet behavior, i.e., a finite spin current and the absence of charge transport in spatially asymmetric structures. Expand