Sökning: "photoemission"

Visar resultat 6 - 10 av 114 avhandlingar innehållade ordet photoemission.

  1. 6. Electronic Structure and Reactions at some Tetrahedral Semiconductor Surfaces

    Författare :Mohammad Goshtasbi Rad; KTH; []
    Nyckelord :scanning tunneling microscopy; photoemission; surface; semiconductor;

    Sammanfattning : .... LÄS MER

  3. 7. Photoelectron Spectroscopy of Cuprates and Manganites

    Författare :Mats Leandersson; Lunds universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HTSC; photoelectron spectroscopy; angle resolved photoemission; magnetoresistance; superconductivity; magnetic resonance; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; magnetiska och optiska ; egenskaper elektriska; supraledare; magnetisk resonans; Physics; spektroskopi; resonant photoemission; Condensed matter:electronic structure; CMR; electrical; supraconductors; magnetic and optical properties; Fysik; Fysicumarkivet A:2000; Leandersson;

    Sammanfattning : Abstract In this thesis, the high temperature superconductors (HTSC) La2CuO4+x and Bi2Sr2CaCu2O8+d and the colossal magnetoresistive (CMR) La1-xSrxMnO3 have been studied by photoelectron spectroscopy. Techniques such as angular resolved photoemission (ARPES), resonant photoemission spectroscopy (RESPES) and x-ray absorption spectroscopy have been applied, using synchrotron radiation. LÄS MER

  4. 8. Photoelectron Spectroscopy of High Temperature Superconductors and Related Compounds

    Författare :Henrik Nylén; Synkrotronljusfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; egenskaper elektriska; supraledare; magnetiska och optiska ; magnetisk resonans; X-ray Absorption; Photoelectron Spectroscopy; Resonant Photoemission; Condensed matter:electronic structure; High Temperature Superconductors; Angle Resolved Photoemission; electrical; supraconductors; magnetic and optical properties; magnetic resonance; spectroscopy; spektroskopi; Kondenserade materiens egenskaper:elektronstruktur; relaxation; Fysicumarkivet A:1998:Nylén;

    Sammanfattning : In this thesis, the high temperature superconductors (HTSC) Ba0.6K0.4BiO3, La2CuO4+x, Bi2Sr2Ca1-xYxCu2O 8+d, Bi2Sr2CuO6+d as well as semiconducting Ba0.9K0. LÄS MER

  5. 9. Angle-resolved photoemission study of unconventional cuprate superconductors

    Författare :Qinda Guo; Oscar Tjernberg; Andrea Damascelli; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Unconventional superconductivity; cuprate; high harmonic generation; narrow bandwidth light source; spherical grating based monochromator; time- and angle-resolved photoemission spectroscopy; Okonventionell supraledning; kuprat; hög övertonsgenerering; ljuskälla med smal bandbredd; sfäriskt gitterbaserad monokromator; tids- och vinkelupplöst fotoemissionsspektroskopi;

    Sammanfattning : Understanding unconventional superconductivity remains one of the most important unsolved problems in physics. A particularly noteworthy case is the copper-based high-temperature superconductor, which stands out due to its remarkably high transition temperature and relatively simple structure. LÄS MER

  7. 10. Photoemission from Alkali Metal Overlayers: Quantum Wells, Photoelectron Interference and Atomic Structure Changes

    Författare :Dan Claesson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum well states; surface structure; alkali metals; angle resolved photoemission; surface electronic phenomena; thin films; collective excitations; electronic structure;

    Sammanfattning : Angle resolved photoelectron spectroscopy is used to investigate alkali metal overlayers on noble metal surfaces. The work deals with interference in photoemission, bulk electronic structure and adsorption induced changes of atomic structure, respectively. The relative importance of surface and bulk in photoemission has remained largely unexplored. LÄS MER