Abstract:
:We have measured the angle-resolved transverse resistivity (ARTR), a sensitive indicator of electronic anisotropy, in high-quality thin films of the unconventional superconductor Sr2RuO4 grown on various substrates. The ARTR signal, heralding the electronic nematicity or a large nematic susceptibility, is present and substantial already at room temperature and grows by an order of magnitude upon cooling down to 4 K. In Sr2RuO4 films deposited on tetragonal substrates the highest-conductivity direction does not coincide with any crystallographic axis. In films deposited on orthorhombic substrates it tends to align with the shorter axis; however, the magnitude of the anisotropy stays the same despite the large lattice distortion. These are strong indications of actual or incipient electronic nematicity in Sr2RuO4.
journal_name
Proc Natl Acad Sci U S Aauthors
Wu J,Nair HP,Bollinger AT,He X,Robinson I,Schreiber NJ,Shen KM,Schlom DG,Božović Idoi
10.1073/pnas.1921713117subject
Has Abstractpub_date
2020-05-19 00:00:00pages
10654-10659issue
20eissn
0027-8424issn
1091-6490pii
1921713117journal_volume
117pub_type
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