Electronic and magnetic properties of epitaxial SrRhO3 films

Abstract

Strong interplay of fundamental order parameters in complex oxides are known to give rise to exotic physical phenomena. The 4d transition metal oxide SrRhO 3 has generated much interest, but advances have been hindered by difficulties in preparing single crystalline phases. Here, we have epitaxially stabilized high quality single crystalline SrRhO 3 films and investigated their structural, electronic, and magnetic properties. We determine that their properties significantly differ from the paramagnetic metallic ground state that governs bulk samples and are strongly related to rotations of the RhO 6 octahedra.

Photoemission and dynamical mean field theory study of electronic correlations in a t2g5 metal SrRhO3 thin film

“…To compute the magnetic susceptibility by DFT+DMFT, we applied a magnetic field of 5 meV (around 86 T) and allowed symmetry breaking of spin up and down. For crystal structure optimization of the SrRhO 3 thin film, we assumed the in-plane symmetry and lattice constants of the SrTiO 3 substrate and relaxed the internal positions of atoms in the unit cell by using DFT [16]. Fig.1 shows the core level HAXPES and SXPES results of the SrRhO 3 thin film.…”

“…In Ref. [16], the possibility of magnetic ordering in the SrRhO 3 thin film with a transition temperature of around 100 K was proposed. To investigate the temperature dependence of the electronic structure in the SrRhO 3 thin film, we also conducted HAXPES measurement at 80 K. However, nearly no temperature dependence was observed, as shown in Fig.2(b).…”

“…Recently, epitaxial SrRhO 3 thin films were successfully synthesized and their transport and magnetic properties were reported by Nichols et al [16]. No FM was observed in the SrRhO 3 thin films but subtle anomalies appeared at around 100 K in magnetization and magnetoresistance, which indicates the possibility of a magnetic transition.…”

“…Since Rh is the neighbour of Ru in the 4d transition metal series, Rh-based perovskite oxides, such as SrRhO 3 [13][14][15][16], Sr 2 RhO 4 [17][18][19][20] and Sr 3 Rh 2 O 7 [21], have also attracted considerable research attention. In the bulk state, these rhodates are usually correlated metals without magnetic ordering.…”

“…Based on density functional theory (DFT) +U calculations, Ref. [16] suggested that a C-type AFM structure is energetically favorable. One remarkable result from Ref.…”