Observation of triplet hole pairs and glassy spin waves in La/sub 2-//sub x//sub -//sub z/Sr/sub x/CuO/sub 4-//sub y/ by electron spin resonance

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.6552· OSTI ID:7090405

Thomann, H; Klemm, R A; Johnston, D C; Tindall, P J; Jin, H; Goshorn, D P

We have systematically studied La/sub 2-//sub x//sub -//sub z/Sr/sub x/CuO/sub 4-//sub y/ by ESR. For hole concentration h = 1+3z+x-2y>1, the ground state most probably contains triplet hole pairs. For y>0, excitations of the anisotropic quantum spin fluid (AQSF) with rather long-range dynamic order) are observed for 180 K<470 K. The AQSF freezes into an anisotropic quantum spin glass at T/sub SG/approx. =100 K (where phonon anomalies also occur), implying spin-phonon and competing spin-spin interactions are important. Below T/sub SG/, two spin-wave-like resonances are observed, suggesting local symmetry breaking of the third spin degree of freedom.

• Research Organization: Corporate Research Science Laboratories, Exxon Research and Engineering Company, Annandale, New Jersey 08801
• OSTI ID: 7090405
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 38:10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
ELECTRON SPIN RESONANCE
HOLES
SPIN GLASS STATE
SPIN WAVES
LANTHANUM OXIDES
STRONTIUM OXIDES
GROUND STATES
HIGH TEMPERATURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
STOICHIOMETRY
SUPERCONDUCTORS
SYMMETRY BREAKING
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ENERGY LEVELS
LANTHANUM COMPOUNDS
MAGNETIC RESONANCE
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
RESONANCE
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
&amp; Refractories- Physical Properties