Information Bridge

Bookmark and Share
Bibliographic Citation 
Full Text edu/cgi-wrap/pubpage?slac-r-589 0 K   View Full Text
DOI 10.2172/799074
Title Charge Dynamics in Low Dimensional Prototype Correlated Systems: A View with High-Energy X-rays
Creator/Author Hasan, Md-Zahid
Publication Date2002 Mar 20
OSTI IdentifierOSTI ID: 799074
Report Number(s)SLAC-R-589
DOE Contract NumberAC03-76SF00515
DOI10.2172/799074
Other Number(s)TRN: US200221%%1584
Resource TypeTechnical Report
Resource RelationOther Information: PBD: 20 Mar 2002
CoverageTopical
Research OrgStanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring OrgUSDOE Office of Energy Research (ER) (US)
Subject72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRILLOUIN ZONES; ELECTRONIC STRUCTURE; LANDAU DAMPING; MANGANESE OXIDES; MOMENTUM TRANSFER; PHOTOEMISSION; PHYSICS; PLASMONS; POLARIZATION; RESONANCE; SCATTERING; SYMMETRY; VECTORS
Description/AbstractThe electronic structure of Mott systems continues to be an unsolved problem in physics despite more than half-century of intense research efforts. Well-developed momentum-resolved spectroscopies such as photoemission and neutron scattering cannot directly address problems associated with the full Mott gap as angle-resolved photoemission probes the occupied states and neutrons do not couple to the electron's charge directly. Our observation of dispersive particle- hole pair excitations across the charge gap (effective Mott gap) in several low dimensional prototype Mott insulators using high resolution resonant inelastic x-ray scattering suggests that the excitations across the gap are highly anisotropic and momentum dependent. The results indirectly provide some information about the momentum dependence of unoccupied states in these correlated systems. The x-ray scattering results are complementary to the electron scattering results by the possibility of studying the excitations in the high momentum transfer regimes (near the zone boundaries and comers). This is also demonstrated in case of studying plasmons near the wave vector regime where Landau damping starts to dominate. X-ray scattering also allows one to probe the symmetry characters of localized electrons and the excitations through the strong polarization dependence of scattering near a core resonance. The study of charge-orbital localization is demonstrated in case of manganese oxides. Given its deeply bulk-sensitive and weak-coupling nature and the ability to probe dispersive behavior of charge fluctuations over several Brillouin zones, inelastic x-ray scattering shows the promise to become an important experimental tool to study the electronic structure of complex quantum systems.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: ED; Size: vp.
System Entry Date2008 Feb 05
Document Discussions
 (for display)
 (Email address will NOT be displayed.)

   (All fields required. Document Discussions not displayed until approved.)

Top