Dashwood, CD; Walker, AH; Kwasigroch, MP; Veiga, LSI; Faure, Q; Vale, JG; Porter, DG; ... McMorrow, DF; + view all Dashwood, CD; Walker, AH; Kwasigroch, MP; Veiga, LSI; Faure, Q; Vale, JG; Porter, DG; Manuel, P; Khalyavin, DD; Orlandi, F; Colin, CV; Fabelo, O; Krüger, F; Perry, RS; Johnson, RD; Green, AG; McMorrow, DF; - view fewer (2023) Strain control of a bandwidth-driven spin reorientation in Ca₃Ru₂O₇. Nature Communications , 14 (1) , Article 6197. 10.1038/s41467-023-41714-8.

Preview

PDF s41467-023-41714-8.pdf - Published Version Download (1MB) | Preview

Abstract

The layered-ruthenate family of materials possess an intricate interplay of structural, electronic and magnetic degrees of freedom that yields a plethora of delicately balanced ground states. This is exemplified by Ca3Ru2O7, which hosts a coupled transition in which the lattice parameters jump, the Fermi surface partially gaps and the spins undergo a 90∘ in-plane reorientation. Here, we show how the transition is driven by a lattice strain that tunes the electronic bandwidth. We apply uniaxial stress to single crystals of Ca3Ru2O7, using neutron and resonant x-ray scattering to simultaneously probe the structural and magnetic responses. These measurements demonstrate that the transition can be driven by externally induced strain, stimulating the development of a theoretical model in which an internal strain is generated self-consistently to lower the electronic energy. We understand the strain to act by modifying tilts and rotations of the RuO6 octahedra, which directly influences the nearest-neighbour hopping. Our results offer a blueprint for uncovering the driving force behind coupled phase transitions, as well as a route to controlling them.

Download activity - last month

Export as CSVJSONXML

Download activity - last 12 months

Export as CSVXMLJSON

Downloads by country - last 12 months

Export as JSONXMLCSV

Archive Staff Only

View Item