ESR spectra of photoinduced defects in MX chain solids

Conference · Mon Nov 30 23:00:00 EST 1992

OSTI ID:10107056

Saxena, A; Bishop, A R ^[1]; Batistic, I ^[2]; Alouani, M ^[3]

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1. Los Alamos National Lab., NM (United States)
2. Zagreb Univ. (Croatia). Inst. of Physics
3. Ohio State Univ., Columbus, OH (United States). Dept. of Physics

We calculate the electron spin resonance (ESR) spectra associated with the spin carrying nonlinear excitations such as neutral solitons, triplet excitons as well as electron and hole polarons for halogen-bridged mixed-valence transition metal (MX: M=Pt, X=Cl,Br,I) linear chain materials within a discrete, 3/4-filled, two-band, tight-binding extended Peierls-Hubbard model. The strongly distorted and localized CDW material, PtCl, is contrasted with the weak CDW, delocalized material, PtBr. The hyperfine structure in the ESR spectra arises from the spin density on the Pt atoms while the superhyperfine structure is attributed to a small spin density present on the halogen sublattice. These theoretical predictions are compared with the recent experimental ESR data on photoinduced defects in PtX materials.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10107056
• Report Number(s): LA-UR--92-3236; CONF-9208132--6; ON: DE93003692
• Country of Publication: United States
• Language: English

Related Subjects

665100
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON SPIN RESONANCE
EXCITONS
HAMILTONIANS
HUBBARD MODEL
HYPERFINE STRUCTURE
NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS
PHOTOCHEMICAL REACTIONS
PLATINUM BROMIDES
PLATINUM CHLORIDES
POLARONS
SOLITONS
SPECTRA
TRANSITION ELEMENTS