dc.contributor.author | Satpathy, Sashi Sekhar, 1956- | eng |
dc.date.issued | 1998 | eng |
dc.description | doi: 10.1088/0953-8984/10/29/003 | eng |
dc.description.abstract | A minimal model, consisting of a 4 4 Hamiltonian and pertaining to a single
Mn-O-Mn bond in the manganites, is introduced and solved to elucidate the physics of the
dynamical Jahn-Teller effect on the double-exchange (DEX) interaction. The effect originates from the coupling of the motion of the bridging oxygen atom to the Mn electrons. It is shown that (i) the DEX interaction is considerably reduced by the dynamical Jahn- Teller effect and (ii) this reduction depends on the oxygen mass leading to an isotope shift in the Curie temperature, Tc / M , with 0:2. The isotope shift is found to depend sharply on the electron hopping parameter t . The exact results are also compared to the results obtained from both the adiabatic and the diabatic approximations. | eng |
dc.description.sponsorship | I thank Peter Pfeifer for stimulating discussions and the Office of Naval Research for partial financial support under contract No ONR N00014-95-1-0439. | eng |
dc.identifier.citation | Dynamical Jahn-Teller effect, double exchange and the isotope shift in the manganites: a toy model | eng |
dc.identifier.issn | 0953-8984 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/9455 | eng |
dc.language | English | eng |
dc.publisher | Institute of Physics | eng |
dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |
dc.subject | spin-orbit coupling | eng |
dc.subject | magnetic phase boundaries | eng |
dc.subject | exchange and superexchange interactions | eng |
dc.subject.lcsh | Crystal field theory | eng |
dc.title | Dynamical Jahn-Teller effect, double exchange and the isotope shift in the manganites: a toy model | eng |
dc.type | Article | eng |