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Topic: Spin orbit coupling

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	Hydrogen Fine Structure
		The small splitting of the spectral line is attributed to an interaction between the electron spin S and the orbital angular momentum L. It is called the spin-orbit interaction.
		The energy levels of atomic electrons are affected by the interaction between the electron spin magnetic moment and the orbital angular momentum of the electron.
		Assuming a circular orbit, the angular momentum is mrv, so this field can be expressed in terms of the orbital angular momentum L: For a hydrogen electron in a 2p state at a radius of 4x the Bohr radius, this translates to a magnetic field of about 0.3 Tesla.
	hyperphysics.phy-astr.gsu.edu /hbase/quantum/hydfin.html (400 words)

	Angular momentum coupling - Wikipedia, the free encyclopedia
		In atomic physics, spin-orbit coupling describes a weak magnetic interaction, or coupling, of the particle spin and the orbital motion of this particle, e.g.
		In Nuclear Magnetic Resonance spin-spin coupling is a kind of weak interaction between the spin of a nucleus and the spins of nearby nuclei.
		Spin-spin coupling or spin-spin splitting is the coupling of the spin angular momentum states of different particles.
	en.wikipedia.org /wiki/Spin-orbit_coupling (1314 words)

	Energy Citations Database (ECD) - - Document #20034399
		An ab initio configuration interaction (CI) study including spin-orbit coupling is carried out for the ground and excited states of the IO radical by employing relativistic effective core potentials.
		The most interesting state in the low-energy IO spectrum, A{sub 1}{sup 2}{Pi}{sub 3/2}, is shown to be predissociated due to interaction with a number of repulsive electronic states.
		Predissociation of the A{sup 1},{nu}{prime}= 0, 1 vibrational levels is attributed to a fairly weak spin-orbit coupling with the{sup 2}{Delta}{sub 3/2} state, while rotationally dependent predissociation of the{nu}{prime}= 2 level is explained by the coupling with the 1/2(III) state having mainly{sup 2}{Sigma}{sup{minus}} character.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=20034399&query_id=0 (0 words)

	Spintronics books \| Spintronics-Info
		The spin degree of freedom is an intrinsically quantum-mechanical phenomenon, leading to both intriguing applications (such as quantum information storage and processing) and unsolved fundamental issues (such as "where does the proton spin come from").
		The present volume investigates central aspects of modern spin physics in the form of extensive lectures on semiconductor spintronics, the spin-pairing mechanism in high- temperature semiconductors, spin in quantum field theory and the nucleon spin.
		Based on the coupling between the spin and orbit momentum, we demonstrate the ways to use spin to drive current by the circular photo galvanic effect (CPGE) and the spin galvanic effect (SGE) with interband excitation.
	www.spintronics-info.com /books (876 words)

	Publication List
		The role of spin-orbit coupling in chemical reactions and new mechanisms of chemical spin polarization.
		The Influence of Spin-Orbit Coupling on the Intensity of Doublet-Doublet and Triplet-Triplet Transitions.
		Non-Equilibrium Spin Polarization of the Si-S1 Centre in Silicon Induced by Spin-Orbit Coupling.
	www.theochem.kth.se /people/boris/pub/pub.html (1555 words)

	Gaussian 03 Release Notes
		In the first, the basis set specified by the user is modified to be appropriate for the Fermi Contact term, by uncontracting the basis and adding tight polarization functions for the core.
		In the second step, the other three terms in the spin-spin coupling are done with the standard basis.
		NMR spin-spin coupling constants can now be calculated for selected atoms rather than all at once.
	www.gaussian.com /g_tech/g03_rel.htm (3167 words)

	Atomic Structure
		In this the orbiting electron is treated as a real physical particle with finite extensions.
		This includes, (i) the necessity and nature of electron spin, (ii) quantisation of electron spin, and (iii) the effect of electron spin on the orbit energy levels and emission spectra.
		In addition it is here that the orbit transition Selection Rules are derived in detail.
	www.relativitydomains.com /Physics (0 words)

	Molecular Magnetism
		C spin-spin coupling tensors in benzene as determined experimentally by liquid crystal NMR and theoretically by ab initio calculations,
		Indirect fluorine coupling anisotropies in p-difluorobenzene: Implications to orientation and structure determination of fluorinated liquid crystals,
		Magnetic field-induced quadrupole coupling in the nuclear magnetic resonance of noble gas atoms and molecules,
	www.helsinki.fi /~jtvaara/publications.html (0 words)

	(GIC) - Fundamental physics discoveries
		Assuming that Gravity increases (relativistically) the gravity's own rest mass, and contract's the gravity's radius, a direct interface between Special Relativity, and General Relativity, is easily shown by perfectly balanced equations, which are accute enough to predict a Sun mass to an accuracy of 9 significant digits.
		Because of their range extending beyond the scale of total solar eclipses involving the Earth, Moon, and Sun, and that their parameters are amazingly precise, these large scale eclipses are identified as 'Perfect Eclipses' to separate them from the same time worn event known as co-incidental 'total solar eclipses'.
		For instance, in one system Venus appears in the orbit of the Moon close to Earth, and in another, Jupiter appears in the orbit of the Moon close to Earth.
	cosmicastronomy.com /eclipse.htm (1708 words)

	eprintweb - cond-mat/0611328 Anisotropic current-induced spin accumulation in the two-dimensional electron gas with ...
		Anisotropic current-induced spin accumulation in the two-dimensional electron gas with spin-orbit coupling
		We investigate the magnetoelectric (or inverse spin-galvanic) effect in the two dimensional electron gases with both Rashba and Dresselhaus spin-orbit coupling using an exact solution of the Boltzmann equation for electron spin and momentum.
		The spin response to an in-plane electric field turns out to be highly anisotropic while the usual charge conductivity remains isotropic, contrary to earlier statements.
	eprintweb.org /S/article/cond-mat/0611328 (105 words)

	IBM RD 50-1 \| Toward dissipationless spin transport in semiconductors
		Propagating modes are the coupled spin-charge movement that occurs in semiconductors with spin-orbit coupling.
		Awschalom and collaborators conducted the experiment in the regime in which the spin splitting is smaller than the lifetime broadening, and concluded that the spin Hall mechanism may be extrinsic (e.g., impurity-related) in their samples.
		As the spin-orbit coupling strength is increased, the induced spin density increases, and its motion changes from a diffusive to a propagating regime.
	www.research.ibm.com /journal/rd/501/bernevig.html (4272 words)

	people in the group
		This coupling is also the driving mechanism for making futuristic devices based on controlled spin transport, such as a spin transistor, where the electron spins would precess (due to the SO coupling) while being transported through the 2DEG channel.
		In a magnetic field the strength of the SO coupling is proportional to the field (in addition to the coupling parameter and the angular momentum).
		As a consequence, an increase in the SO coupling strength causes the energy level crossings to move to weaker fields and the jump in magnetization shows a large shift to weaker magnetic fields.
	www.physics.umanitoba.ca /nano/research.html (1857 words)

	SPINTRONICS (Jaro Fabian)
		One has to realize (as Elliott did first) that in the presence of spin-orbit coupling, spin up and spin down states are no longer good quantum numbers.
		Instead, new Bloch eigenstates are mixtures of spin up and down states, although usually one state dominates and electrons can still be called "up" and "down." As a result, even scalar (spin-independent) interactions due to impurities or phonons can cause spins to flip (slide).
		Spin hot spots are points on the Fermi surface where the surface cuts through a Brillouin zone boundary, special symmetry point, or a line of accidental degeneracy.
	physik.kfunigraz.ac.at /~jaf/research/spintronics/spin_relaxation/relaxation.html (1073 words)

	SPINTRONICS (Jaro Fabian) (Site not responding. Last check: )
		Spin orientation of conduction electrons survives for a relatively long time (nanoseconds, compared to tens of femtoseconds during which electron momentum decays), which makes spintronic devices particularly attractive for memory storage and magnetic sensors applications, and, potentially for quantum computing where electron spin would represent a bit (called qubit) of information.
		We reviewed the mechanisms of spin relaxation, and efforts (both experimental and theoretical) to enhance the spin memory of conduction electrons in metals and semiconductors, in J.
		Instead, new Bloch eigenstates are mixtures of spin up and down species, although almost always one of the species dominates and electrons can still be nicknamed "up" and "down." Now even scalar (spin-independent) interactions due to impurities or phonons can cause spins to flip (slide).
	www.glue.umd.edu /~jfabian/spintronics.html (1170 words)

	[No title] (Site not responding. Last check: )
		The spin-orbit coupling due to the bulk inversion symmetry (the Dresselhaus spin-orbit coupling) and the structure inversion symmetry (the Rashba spin-orbit coupling) is qubic in the momentum and strongly dependent of the ratio of the size along the growth direction and the lateral size.
		The spin mixing in quantum dots with positive g-factor leads to a cusp structure of spin relaxation rates as a function of a magnetic field, whereas the magnetic field dependence of spin relaxation rates of heavy holes in quantum dots with negative g-factor is monotonic.
		Due to the strong dependence of spin-orbit coupling on the ratio between the hight and the lateral size of a quantum dot the spin relaxation time for heavy holes can be comparable to or even less than that for electrons.
	theorie5.physik.unibas.ch /seminar/abstracts/bulaev.html (402 words)

	Publications of Ulrich Zuelicke (Site not responding. Last check: )
		As an important consequence of the presence of spin splitting, we identify a nontrivial persistent spin current that is not simply proportional to the charge current.
		Verification of spin filtering in the device is possible via measurement of the differential tunneling conductance, which would yield the first direct observation of the Rashba effect.
		Abstract: Spin splitting due to spin-orbit (SO) coupling is very different, both in its physical origin and dynamical consequences, from the energy splitting of orthogonal spin states in a ferromagnet or due to the Zeeman effect.
	www-tfp.physik.uni-karlsruhe.de /~zuelicke/PAPERS (3321 words)

	GAMESS Further References: Trans. Moments and Spin-Orbit (Site not responding. Last check: )
		A spin- orbit coupling run almost always does two or more CI calculations, as the states to be coupled are usually of different multiplicities.
		In the preliminary CI, the spin function is just the alpha spin doublet, and all three roots should be degenerate, and furthermore equal to the GVB energy at step 2.
		The spin-orbit coupling code uses both doublet spin functions with each of the three spatial wavefunctions, so the spin-orbit Hamiltonian is a 6x6 matrix.
	www.ensta.fr /~muguet/gamess/howto.s-o.html (1302 words)

	APS - 2006 APS March Meeting - Event - Theory of Spin Hall Effect in GaAs (Site not responding. Last check: )
		In the spin Hall effect, an electric current in a system with spin-orbit coupling induces a transverse spin current which leads to non-equilibrium spin accumulation near sample boundaries.
		Generating and manipulating non-equilibrium spin magnetization by electric fields is one of the most desirable goals of semiconductor spintronics, because electric fields have potentialities for accessing individual spins at nanometer scales.
		Furthermore, we analyzed the effect of \textit{intrinsic} spin-orbit coupling in the presence of anisotropic impurity scattering, and found that, somewhat surprisingly, an electrical field can lead to a bulk magnetization component \textit{perpendicular} to both the spin-orbit field and an external magnetic field.
	meetings.aps.org /Meeting/MAR06/Event/43801 (275 words)

	Tunable Non (Site not responding. Last check: )
		A theoretical analysis of spin separation by spin-orbit coupling and magnetic focusing, in the context of a 2D electron system, has been presented independently by Usaj and Balseiro [1].
		The separation via spin-orbit coupling, achieved in these experiments, was made possible by the very high quality of the hole-doped samples and lithographic structures, and by the fact that the momentum-splitting due to spin-orbit coupling, which is measured in the experiments, is an order of magnitude larger than in typical GaAs 2D electron systems.
		The achievement of spin selection by an in-plane magnetic field in the detector point contact is another noteworthy accomplishment.
	www.bell-labs.com /jc-cond-mat/july/jccm_jul04_01.html (421 words)

	Journal of Vision - Spin-orbit coupling in vision: Evidence from representational displacement, by Yamada, Kawabe, ... (Site not responding. Last check: )
		This suggested that the displacement was attributed to the internalised representational friction.
		In the third experiment, the target was stationary while spinning and no displacement was observed, and so spin was considered to have no self-propulsion.
		The results of three experiments suggest that two kinds of motion, namely, orbit and spin, interact in visual short-term memory, the by-product of which is the mislocalization.
	journalofvision.org /5/8/658 (295 words)

	Dublin Workshop Speaker Abstracts
		Electron spin is a natural candidate for a spin-qubit since every spin 1/2 encodes exactly one qubit.
		Coherent manipulation, filtering, and measurement of electronic spin in quantum dots and other nanostructures are new technologies which have promising applications both in conventional and in quantum information processing and transmission.
		I address the issue of spin decoherence due to non-uniform hyperfine interactions with nuclei and show that for electrons confined to dots the spin decay is non-exponential.
	www.quiprocone.org /Dublin/dublinabstracts.htm (1861 words)

	The Russell Saunders Coupling Scheme (Site not responding. Last check: )
		This is found to give a good approximation for first row transition series where J coupling can generally be ignored, however for elements with atomic number greater than thirty, spin-orbit coupling becomes more significant and the j-j coupling scheme is used.
		Coupling occurs between the resultant spin and orbital momenta of an electron which gives rise to J the total angular momentum quantum number.
		Note that, for simplicity, spin multiplicities are not included in the table since they remain the same for each term.
	wwwchem.uwimona.edu.jm /courses/RScoupling.html (1221 words)

	SPIN HALL EFFECT
		We show numerically that the spin polarization near the edge induced by this mechanism can be large, and that it becomes larger and more strongly localized as the spin-orbit coupling strength increases, and is independent of the width of the conducting strip once this exceeds the elastic scattering mean-free-path.
		The proposal of the intrinsic spin Hall effect is certainly important for spintronics given that the Hall spin currents it generates are considerably bigger than in the extrinsic effect, and it opens new avenues for controlling spincurrents in semiconductor devices without applying magnetic fields or using ferromagnetic elements.
		The basic physics of the intrinsic spin Hall effect are illustrated in the figures to the left.
	faculty.physics.tamu.edu /sinova/SHE.htm (1040 words)

	Development of a New Spin-Orbit Coupling Program Package
		The inclusion of spin-orbit coupling effects in quantum chemical calculations has been subject to intense research in Bonn since several years.
		Fine-structure splittings and spin-orbit coupled wavefunctions are evaluated optionally by quasi-degenerate perturbation theory (QDPT) in the basis of configuration interaction (CI) wavefunctions, by direct solution of perturbation equations in the basis of spin-symmetry adapted functions (SAFs, or configuration state functions, CSFs), or in a spin-orbit CI (SOCI).
		We are currently developing spin-orbit coupling modules for this program, which will allow the calculation of spin-orbit matrix elements over CI wavefunctions and SOCI calculations for larger molecules, both with HF and KS orbitals.
	www.thch.uni-bonn.de /tc/groups/marian/bericht00/node14.html (484 words)

	OPUS - Semiklassische Näherungen zur Spin-Bahn Kopplung
		The dissertation is concerned with spin-orbit coupling in the context of periodic-orbit theory (POT).
		This work is based on generalized theories, where the coupling can be integrated in two limits (weak and strong coupling).
		The used spin-orbit coupling typically appears in nuclear physics or in 2-dim.
	www.bibliothek.uni-regensburg.de /opus/volltexte/2001/29 (463 words)

	Untitled Document (Site not responding. Last check: )
		It is well known that spin-orbit coupling introduces a spin-triplet component into the spin states of a BCS superconductor.
		For this reason they make ideal candidates for studying the effects of interface spin-orbit coupling that is induced by impurity coatings, such as Au or Pt.
		In the graphic on the left we depict one of several issues addressed in a series of experments in which the spin susceptibitlity of the superconducting state is probed via parallel field measurements on Be/Au bilayers.
	www.phys.lsu.edu /faculty/adams/Spin_Proximity.html (377 words)

	Dissertationsserver der Stabi - Interaction and confinement in nanostructures : Spin-orbit coupling and electron-phonon ...
		In general, spin-orbit interaction couples the spin of a particle to its orbital motion.
		For a quantum wire, we show that one-electron spectral and spin properties are governed by a combined spin orbital-parity symmetry of wire.
		The breaking of this spin parity by a perpendicular magnetic field leads to the emergence of a significant energy splitting at k=0 and hybridisation effects in the spin density.
	www.sub.uni-hamburg.de /opus/volltexte/2005/2419 (806 words)

	spinflip (Site not responding. Last check: )
		As long as the orbit (L) does not equal zero (like it would as an s orbital), coupling between these two magnets can occurs.
		The interaction of these two magnets is called spin orbit coupling.
		The quantum number l=1 adding constructively to a spin of 1/2 gives rise to a J value of1-1/2.
	www.sas.upenn.edu /~mcnemar/firefly/spinflip.html (259 words)

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