Magnetic field induced structural phase transitions in mixed Jahn-Teller DyξTb1-ξVO4 crystals

Jahn-Teller effects in the mixed vanadate/phosphate crystalsTbV1−xPxHirano1, Wakabayashi2, Loong3 et al. 2003Phys. Rev. B

“…[5][6][7][8][9][10][11][12][13][14][15][16][17] In general, a reduction of the transition temperature T D was observed in these mixed compounds. A modified molecular-field model was developed to explain the experimental data.…”

A unitary transformation approach to the mutual quenching of structural and magnetic ordering in cooperative Jahn-Teller systems

“…The non-Kramers degeneracy of the electron-phonon system is often called the cooperative Jahn-Teller (CJT) effect. Recently, the study of the CJT effect has been flourishing in the fields of high-T c superconductivity [1] and ferroelectricity [2]; meanwhile numerous theoreticians and experimentalists [3][4][5][6][7][8] have been engaged in the study of the phase transitions and long-range orderings of the CJT systems. In present paper we carry out a theoretical study of the long-range orderings using a unitary transformation (UT) approach, and investigate the mutual quenching CJT system as an example, to demonstrate the use of our theory.…”