Structural aspects of metamagnetism in Ca_{2-x}Sr_{x}RuO_4 (0.2 < x < 0.5): field tuning of orbital occupation

Abstract

The crystal structure of Ca_{2-x}Sr_xRuO_4 with 0.2 < x < 1.0 has been studied by diffraction techniques and by high resolution capacitance dilatometry as a function of temperature and magnetic field. Upon cooling in zero magnetic field below about 25 K the structure shrinks along the c-direction and elongates in the a, b planes (0.2 < x < 1.0), whereas the opposite occurs upon cooling at high-field (x = 0.2 and 0.5). These findings indicate an orbital rearrangement driven by temperature and magnetic field, which accompanies the metamagnetic transition in these compounds.

4 pages, 4 figures, submitted to Physical Review Letters

References in corpus (7)

• Orbital-selective Mott transitions in the degenerate Hubbard model
• Metamagnetism and critical fluctuations in high quality single crystals of the bilayer ruthenate Sr3Ru2O7
• Evidence for incommensurate spin fluctuations in Sr_2RuO_4
• Structural and magnetic aspects of the metal insulator transition in Ca${}_{2-x}$Sr${}_x$RuO${}_4$
• Magnetic Phase Diagram of Ca2-xSrxRuO4 Governed by Structural Distortions
• Orbital Dependent Phase Control in Ca2-xSrxRuO4
• Temperature and magnetic field dependence of the lattice constant in spin-Peierls cuprate CuGeO_3 studied by capacitance dilatometry in fields up to 16 Tesla

Cited by in corpus (9)

• Magnetoelastic coupling in RETiO3 (RE = La, Nd, Sm, Gd, Y)
• Coulomb-Enhanced Spin-Orbit Splitting: The Missing Piece in the Sr2RhO4 Puzzle
• Magnetic excitations in the metallic single-layer Ruthenates Ca(2-x)Sr(x)RuO(4) studied by inelastic neutron scattering
• Spin-orbit coupling induced Mott transition in Ca${}_{2-x}$Sr${}_x$RuO${}_4$ (0<x<0.2)
• Multiple superconducting transitions in the Sr3Ru2O7 region of Sr3Ru2O7-Sr2RuO4 eutectic crystals
• Magnetoelastic coupling across the metamagnetic transition in Ca${}_{2-x}$Sr${}_x$RuO${}_4$ (0.2 < x < 0.5)
• Field-induced paramagnons at the metamagnetic transition in Ca1.8Sr0.2RuO4
• Thermodynamic Properties of (Ca,Sr)${}_2$RuO${}_4$ in Magnetic Fields
• Interplay of metamagnetic and structural transitions in Ca${}_{2-x}$Sr${}_x$RuO${}_4$