Itinerant Electron Ferromagnetism in the Quantum Hall Regime

We report on a study of the temperature and Zeeman-coupling-strength dependence of the one-particle Green's function of a two-dimensional (2D) electron gas at Landau level filling factor $\nu =1$ where the ground state is a strong ferromagnet. Our work places emphasis on the role played by the itinerancy of the electrons, which carry the spin magnetization and on analogies between this system and conventional itinerant electron ferromagnets. We discuss the application to this system of the self-consistent Hartree-Fock approximation, which is analogous to the band theory description of metallic ferromagnetism and fails badly at finite temperatures because it does not account for spin-wave excitations. We go beyond this level by evaluating the one-particle Green's function using a self-energy, which accounts for quasiparticle spin-wave interactions. We report results for the temperature dependence of the spin magnetization, the nuclear spin relaxation rate, and 2D-2D tunneling conductances. Our calculations predict a sharp peak in the tunneling conductance at large bias voltages with strength proportional to temperature. We compare with experiment, where available, and with predictions based on numerical exact diagonalization and other theoretical approaches.Comment: 29 pages, 20 figure

From sail to steam; recollections of naval life,

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Types of naval officers drawn from the history of the British navy; with some account of the conditions of naval warfare at the beginning of the eighteenth century, and of its subsequent development during the sail period,

Introductory. Conditions of naval warfare at the beginning of the eighteenth century.--Progress of naval warfare during the eighteenth century; Hawke: the spirit.--Rodney: the form.--Howe: the general officer, as tactician.--Jervis: the general officer, as disciplinarian and strategist.--Saumarez: the fleet officer and division commander.--Pellew: the frigate captain and partisan officer.Mode of access: Internet

Naval administration and warfare : some general principles, with other essays /

Includes bibliographical references.The principles of naval administration (National review, Jun, 1908)--The United States Navy Department (Scribner's magazine, May, 1908)--Principles involved in the war between Japan and Russia (National review, September, 1904)--Retrospect upon the war between Japan and Russia (National review, May 1906)--Objects of the United States Naval War College (an address at the annual opening, August 6,1888)--The practical character of the United States Naval War College (an address at the annual opening, September 6, 1892)--Subordination in historical treatment (president's address at the annual meeting of the American historical association, December 26, 1902)--The strength of Nelson (National review, November, 1905)--The value of the Pacific cruise of the United States fleet, 1908 (Prospect: The Scientific American, December 7, 1907. Retrospect: Collier's weekly, August 29, 1908)--The Monroe doctrine (National review, February, 1902)Mode of access: Internet

The gulf and inland waters,

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The influence of sea power upon the French revolution and empire, 1793-1812 /

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Lessons of the war with Spain, : and other articles, /

The first article (p. 1-207) deals mainly with the naval aspects of the war.Reprinted from the various periodicals, 1898-99.Lessons of the war with Spain, 1898.--The Peace conference and the moral aspects of the war.--The relations of the United States to their new dependencies.--Distinguishing qualities of ships of war.--Current fallacies upon naval subjects.Mode of access: Internet

The life of Nelson : the embodiment of the sea power of Great Britain /

Mode of access: Internet