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This article reviews spin-dependent transport of carriers in homogenous three-dimensional and two-dimensional semiconductors. We begin with a discussion of optical orientation of electron spins, which allows both the creation and detection…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 R. Winkler

The electrical injection of spin polarized electrons in a semiconductor can be achieved in principle by driving a current from a ferromagnetic metal, where current is known to be significantly spin polarized, into the semiconductor via…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 A. T. Filip , B. H. Hoving , F. J. Jedema , B. J. van Wees

We present measurements of electromagnetically induced transparency with an ensemble of donor- bound electrons in low-doped n-GaAs. We used optical transitions from the Zeeman-split electron spin states to a bound trion state in samples…

Mesoscale and Nanoscale Physics · Physics 2010-10-11 Maksym Sladkov , A. U. Chaubal , M. P. Bakker , A. R. Onur , D. Reuter , A. D. Wieck , C. H. van der Wal

The high field charge injection and transport properties in reinforced silicone dielectrics were investigated by measuring the time-dependent space charge distribution and the current under dc conditions up to the breakdown field, and were…

Materials Science · Physics 2016-08-04 Yanhui Huang , Linda. S. Schadler

An effective spin relaxation mechanism that leads to electron spin decoherence in a quantum dot is proposed. In contrast to the common calculations of spin-flip transitions between the Kramers doublets, we take into account a process of…

Materials Science · Physics 2009-11-10 Y. G. Semenov , K. W. Kim

We investigate quantum coherence of electron spin transported through a semiconductor spintronic device, where spins are envisaged to be controlled by electrical means via spin-orbit interactions. To quantify the degree of spin coherence,…

Mesoscale and Nanoscale Physics · Physics 2017-08-23 Branislav K. Nikolic , Satofumi Souma

We describe a new possible route to the metal-insulator transition in doped semiconductors such as Si:P or Si:B. We explore the possibility that the loss of metallic transport occurs through Mott localization of electrons into a quantum…

Strongly Correlated Electrons · Physics 2012-10-15 Andrew C. Potter , Maissam Barkeshli , John McGreevy , T. Senthil

We consider theoretically a magnetic impurity spin driven by polarized electrons tunneling through a double quantum dot system. Spin blockade effect and spin conservation in the system make the magnetic impurity sufficiently interact with…

Mesoscale and Nanoscale Physics · Physics 2015-11-04 Wenxi Lai , Wen Yang

We study spin-dependent transport in a two-dimensional electron gas subject to an external step-like potential $V(x)$ and irradiated by an electromagnetic field (EF). In the absence of EF the electronic spectrum splits into spin sub-bands…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 M. V. Fistul , K. B. Efetov

Spin accumulation and spin precession in single-layer graphene are studied by non-local spin valve measurements at room temperature. The dependence of the non-local magnetoresistance on electrode spacing is investigated and the results…

Mesoscale and Nanoscale Physics · Physics 2010-01-20 Wei Han , K. Pi , W. Bao , K. M. McCreary , Yan Li , W. H. Wang , C. N. Lau , R. K. Kawakami

We present a microscopic theory of coherent quantum transport through a superconducting film between two ferromagnetic electrodes. The scattering problem is solved for the general case of ferromagnet/superconductor/ferromagnet (FSF)…

Superconductivity · Physics 2015-06-24 Milos Bozovic , Zoran Radovic

We study single electron transport across a single Bi dopant in a Silicon Nanotransistor to assess how the strong hyperfine coupling with the Bi nuclear spin $I=9/2$ affects the transport characteristics of the device. In the sequential…

Mesoscale and Nanoscale Physics · Physics 2013-08-19 F. Delgado , R. Aguado , J. Fernández-Rossier

We present a symmetry analysis of electronic bandstructure including spin-orbit interaction close to the insulating gap edge in monolayer black phosphorus ('phosphorene'). Expressions for energy dispersion relation and spin-dependent…

Materials Science · Physics 2014-10-03 Pengke Li , Ian Appelbaum

Coherent coupling between a large number of qubits is the goal for scalable approaches to solid state quantum information processing. Prototype systems can be characterized by spectroscopic techniques. Here, we use pulsed-continuous wave…

Mesoscale and Nanoscale Physics · Physics 2011-04-01 M. Ziaur Rahman Khan , D. G. Hasko , M. S. M. Saifullah , M. E. Welland

We study high-field spin transport of electrons in a quasi one-dimensional channel of a $GaAs$ gate controlled spin interferometer (SPINFET) using a semiclassical formalism (spin density matrix evolution coupled with Boltzmann transport…

Mesoscale and Nanoscale Physics · Physics 2009-09-29 S. Pramanik , S. bandyopadhyay , M. Cahay

We consider the electronic transport properties of phosphorus (P) doped silicon nanowires (SiNWs). By combining ab initio density functional theory (DFT) calculations with a recursive Green's function method, we calculate the conductance…

Mesoscale and Nanoscale Physics · Physics 2008-01-09 Troels Markussen , Riccardo Rurali , Antti-Pekka Jauho , Mads Brandbyge

We investigate quantum synchronization theoretically in a system consisting of two cold ions in microtraps. The ions' motion is damped by a standing-wave laser whilst also being driven by a blue-detuned laser which results in…

Quantum Physics · Physics 2015-06-10 Michael R. Hush , Weibin Li , Sam Genway , Igor Lesanovsky , Andrew D. Armour

Heavy polar molecules can be used to measure the electric dipole moment of the electron, which is a sensitive probe of physics beyond the Standard Model. The value is determined by measuring the precession of the molecule's spin in a plane…

Atomic Physics · Physics 2010-01-29 M. R. Tarbutt , J. J. Hudson , B. E. Sauer , E. A. Hinds

We report an insulator-metal-insulator transition in films of five metal phthalocyanines (MPc) doped with alkali atoms. Electrical conduction measurements demonstrate that increasing the alkali concentration results in the formation of a…

Other Condensed Matter · Physics 2007-05-23 M. F. Craciun , S. Rogge , M. J. L. den Boer , S. Margadonna , K. Prassides , Y. Iwasa , A. F. Morpurgo

We consider electron transport along a single-mode channel which is in contact, via tunnel junctions in its walls, with two quantum dots. Electron tunneling to and from the dots contributes to the electron backscattering, and thus modifies…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Hiroyuki Tamura , Leonid I. Glazman