Journal
PHYSICAL REVIEW X
Volume 4, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.4.031003
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Funding
- Materials Sciences and Engineering Division of the Office of Basic Energy Sciences, U.S. Department of Energy
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
- Office of Science of the U.S. Department of Energy [DE-AC05-00OR22725]
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In view of the continuous theoretical efforts aimed at an accurate microscopic description of the strongly correlated transition metal oxides and related materials, we show that with continuum quantumMonte Carlo (QMC) calculations it is possible to obtain the value of the spin superexchange coupling constant of a copper oxide in a quantitatively excellent agreement with experiment. The variational nature of the QMC total energy allows us to identify the best trial wave function out of the available pool of wave functions, which makes the approach essentially free from adjustable parameters and thus truly ab initio. The present results on magnetic interactions suggest that QMC is capable of accurately describing ground-state properties of strongly correlated materials.
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