The center for spintronics and quantum computation is part of the california nanosystems institute cnsi based at the university of california santa barbara. We start with a short overview of low dimensional semiconductor structures and. This has been fueled for instance by the remarkable advances in our ability to fabricate nanostructures such as quantum wells, quantum wires and quantum dots. Valleytronics development could lead to new approaches. In addition to providing spindependent analogies that extend existing electronic devices into the realm of semiconductor spintronics, the spin degree of freedom also offers prospects for fundamentally new. Toward a scalable, siliconbased quantum computing architecture dean copsey, mark oskin, francois impens, tzvetan metodiev, andrew cross, student member, ieee, frederic t.
Semiconductor nanostructures for quantum computation. Semiconductor heterostructures for spintronics and quantum. A single carrier spin in a single quantum dot represents a potential candidate for qbit implementation in a solid state environment, in view of applications in the fields of spintronics and. Semiconductor qubits for quantum computation matthias fehr tu munich jass 2005 st. Electronic spin transport, persistence and manipulation in nonmagnetic semiconductor materials, as well as the interaction of electronic spins with optics, are the. Spintronics and quantum computation 301 is known as spin life time or spin relaxation time t 1. Generation and detection of spin current in semiconductors. Molecular spintronics is a new and emergent subarea of spintronics that can benefit from achievements in molecular electronics and molecular magnetism. The past few decades of research and development in solidstate semicon ductor physics and electronics have witnessed a rapid growth in the drive to exploit quantum mechanics in the design. Review article challenges for semiconductor spintronics. Nanostructures and applications in spintronics and quantum computation. Semiconductor spintronics and quantum computation with 151 figures springer.
Spintronics refers commonly to phenomena in which the spin of electrons in a solid state environment plays the determining role. We have used cvdgrown hbn on cvd graphene, as well as few layer hbn on a graphene hbn stack. Spintronics advance brings waferscale quantum devices closer to reality 24 june 2015 light polarizes silicon nuclear spins within a silicon carbide chip. Quantum computing moves forward with spintronics progress. Contents 1 ferromagnetic iiiv semiconductors and their heterostructures hideo ohno 1.
Quantum information processing and quantum computing a quantum information science and technology roadmap part 1. This having been said though, many of the experimental indicators of these quantum e. Nanostructures, magnetic semiconductors and spintronics. Perhaps, a more revealing quantity than spin life time is spin diffusion length l s which measures how far electrons diffuse in a solid without losing. Spintronics electron transport in qd spin injection spin relaxation coulomb blockade in quantum dots iv. Semiconductor spintronics and quantum computation springerlink. Pdf molecular quantum spintronics using singlemolecule. Encoding quantum information in spins embedded in semiconductors electronic, ionic, or nuclear offers several potential approaches towards. Modeling for semiconductor spintronics semion saikin1,2, yuriy v. In a more narrow sense spintronics is an emerging research field of. T he single qubit operations could be implemented with. Semiconductor spintronics offers a possible direction towards the development of hybrid devices that could perform all three of these operations, logic, communications and storage, within the. Quantum computation with twoelectron spins in semiconductor quantum dots publisher school of science unit department of applied physics series aalto university publication series doctoral. Semiconductor spintronics and quantum computation request pdf.
Spintronics, spinpolarized transport, quantum computation. Optical control in semiconductors for spintronics and. The effect was found to depend strongly on the strength of the applied bias. Spintronics, or spin electronics, involves the study of active control and. Pershin1,3 and vladimir privman1 1 center for quantum device technology, clarkson university, potsdam, ny 6995721, usa 2. Quantum computing moves forward with spintronics progress nanowerk news new technologies that exploit quantum behavior for computing and other applications are closer than ever. The past few decades of research and development in solidstate semicon ductor physics and electronics have witnessed a rapid growth in the drive to exploit quantum mechanics in the design and function of semiconductor devices. Spintronics spin generation magnetic semiconductors spin detection iii.
But the electron spin has essentially been neglected. Information processing with spin currents berend t. Applications in spintronics and quantum computation. Yoshihisa yamamoto, matthew pelton, charles santori, glenn s. A shorthand definition for valleytronics would be a movement away from exploiting the electrical charge of electrons as a means for storing information, and instead using the wave quantum number. Semiconductor spintronics jaroslav fabian,1,a alex. This time scale is indeed longer compared to electron momentum relaxation femtosecond time. Ferromagnetism and semiconductor spintronics offer new opportunities for improving electronics.
The results were presented and were discussed based on the dp spin relaxation mechanism. Hot off the presses is semiconductor spintronics and quantum computation, edited by david d. Quantum theory of spintronics in magnetic nanostructures. Semiconductor spintronics and quantum computation david. Although the quantum computer represents today a distant and uncertain perspective, theoretical work shows that it may extend enormously the present computing possibilities 4.
Quantum theory of spintronics in magnetic nanostructures j. Spintronics advance brings waferscale quantum devices. Encoding quantum information in spins embedded in semiconductors electronic, ionic, or nuclear offers several potential approaches towards solidstate quantum computation. In addition to providing spindependent analogies that extend existing electronic devices into the realm of semiconductor spintronics, the spin degree of freedom also offers prospects for fundamentally new functionality within the quantum domain, ranging from storage to computation. Molecular spintronics and quantum computing journal of. Rappoport cinvestav 2005 3 outline nanotechnology spintronics. Possible applications of spintronics include highspeed magnetic. Semiconductor spintronics and quantum computation d. Request pdf semiconductor spintronics and quantum computation the manipulation of electric charge in bulk semiconductors and their heterostructures. Realization of a physical system for processing of quantum information that is tolerant of errors is a fundamental problem in quantum science and engineering.
Even ignoring quantum effects, these two spin states can be used as the logical states for classical information processing this is the essence of spintronics. Quantum transport in semiconductor spintronics ud physics. Petersburgrussia is it possible to realize a quantum computer with semiconductor technology. Semiconductor spintronics and quantum computation, ed. Challenges for semiconductor spintronics nature physics. The late richard feynman and others have pointed out that quantum. Solid state approaches quantum information processing. Pdf a revolution in electronics is in view, with the contemporary evolution of the two novel disciplines of spintronics and molecular electronics. Umerski2 1department of mathematics, city university, london, united kingdom 2department of applied mathematics, open.
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