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32 papers
Giant lattice softening at a Lifshitz transition in SrRuO
Hilary M. L. Noad, Kousuke Ishida, You-Sheng Li +11
The interplay of electronic and structural degrees of freedom in solids is a topic of intense research. Experience and intuition suggest that structural changes drive conduction el…
Hierarchy of Lifshitz transitions in the surface electronic structure of SrRuO under uniaxial compression
Edgar Abarca Morales, Gesa-R. Siemann, Andela Zivanovic +12
We report the evolution of the electronic structure at the surface of the layered perovskite SrRuO under large in-plane uniaxial compression, leading to anisotropic $B_{1g}…
Probing momentum-dependent scattering in uniaxially stressed SrRuO through the Hall effect
Po-Ya Yang, Hilary M. L. Noad, Mark E. Barber +4
Under in-plane uniaxial stress, the largest Fermi surface sheet of the correlated metal SrRuO undergoes a Lifshitz transition from an electron-like to an open geometry. We…
Upper Critical Field of SrRuO under In-Plane Uniaxial Pressure
Fabian Jerzembeck, Alexander Steppke, Andrej Pustogow +9
In-plane uniaxial pressure has been shown to strongly tune the superconducting state of Sr2RuO4 by approaching a Lifshitz transition and associated Van Hove singularity (VHS) in th…
Spin-density-wave order controlled by uniaxial stress in CeAuSb
R. Waite, F. Orlandi, D. A. Sokolov +6
The tetragonal heavy-fermion compound CeAuSb (space group ) exhibits incommensurate spin density wave (SDW) order below with the propagation vector…
Elastocaloric determination of the phase diagram of SrRuO
You-Sheng Li, Markus Garst, Jörg Schmalian +11
One of the main developments in unconventional superconductivity in the past two decades has been the discovery that most unconventional superconductors form phase diagrams that al…
Heisenberg spins on an anisotropic triangular lattice: PdCrO2 under uniaxial stress
Dan Sun, Dmitry A. Sokolov, Richard Waite +6
When Heisenberg spins interact antiferromagnetically on a triangular lattice and nearest-neighbor interactions dominate, the ground state is 120 antiferromagnetism. In th…
The Superconductivity of SrRuO Under -Axis Uniaxial Stress
Fabian Jerzembeck, Henrik S. Røising, Alexander Steppke +7
Applying in-plane uniaxial pressure to strongly correlated low-dimensional systems has been shown to tune the electronic structure dramatically. For example, the unconventional sup…
Tuning the Fermi Liquid Crossover in SrRuO with Uniaxial Stress
Aaron Chronister, Manuel Zingl, Andrej Pustogow +10
We perform nuclear magnetic resonance (NMR) measurements of the oxygen-17 Knight shifts for SrRuO, while subjected to uniaxial stress applied along [100] direction. The res…
The planar triangular magnet AgCrSe: magnetic frustration, short range correlations, and field tuned anisotropic cycloidal magnetic order
M. Baenitz, M. M. Piva, S. Luther +25
Our studies evidence an anisotropic magnetic order below ~K. Susceptibility data in small fields of about 1~T reveal an antiferromagnetic (AFM) order for , whe…
Strong Increase in Ultrasound Attenuation Below T in SrRuO: Possible Evidence for Domains
Sayak Ghosh, Thomas G. Kiely, Arkady Shekhter +5
Recent experiments suggest that the superconducting order parameter of SrRuO has two components. A two-component order parameter has multiple degrees of freedom in the supe…
High sensitivity heat capacity measurements on Sr2RuO4 under uniaxial pressure
You-Sheng Li, Naoki Kikugawa, Dmitry A. Sokolov +7
A key question regarding the unconventional superconductivity of SrRuO remains whether the order parameter is single- or two-component. Under a hypothesis of two-component…
Magnetic field-induced softening of spin waves and hard-axis order in Kondo-lattice ferromagnet CeAgSb
S. E. Nikitin, A. Podlesnyak, J. Xu +5
A significant number of Kondo-lattice ferromagnets order perpendicular to the easy magnetization axis dictated by the crystalline electric field. The nature of this phenomenon has…
Changes of Fermi Surface Topology due to the Rhombohedral Distortion in SnTe
Christopher D. O'Neill, Oliver J. Clark, Harry D. J. Keen +7
Stoichiometric SnTe is theoretically a small gap semiconductor that undergoes a ferroelectric distortion on cooling. In reality however, crystals are always non-stoichiometric and…
Evidence for even parity unconventional superconductivity in SrRuO
Aaron Chronister, Andrej Pustogow, Naoki Kikugawa +6
Unambiguous identification of the superconducting order parameter symmetry of SrRuO has remained elusive for more than a quarter century. While a chiral -wave ground sta…
Split superconducting and time-reversal symmetry-breaking transitions, and magnetic order in SrRuO under uniaxial stress
Vadim Grinenko, Shreenanda Ghosh, Rajib Sarkar +17
Among unconventional superconductors, SrRuO has become a benchmark for experimentation and theoretical analysis because its normal-state electronic structure is known with…
Thermodynamic Evidence for a Two-Component Superconducting Order Parameter in SrRuO
Sayak Ghosh, Arkady Shekhter, F. Jerzembeck +6
SrRuO has stood as the leading candidate for a spin-triplet superconductor for 26 years. Recent NMR experiments have cast doubt on this candidacy, however, and it is diffic…
Electronically driven spin-reorientation transition of the correlated polar metal CaRuO
I. Marković, M. D. Watson, O. J. Clark +11
Polar distortions in solids give rise to the well-known functionality of switchable macroscopic polarisation in ferroelectrics and, when combined with strong spin-orbit coupling, c…
A key role of correlation effects in the Lifshitz transition in SrRuO
Mark E. Barber, Frank Lechermann, Sergey V. Streltsov +8
Uniaxial pressure applied along an Ru-Ru bond direction induces an elliptical distortion of the largest Fermi surface of SrRuO, eventually causing a Fermi surface topologic…
Magnetic frustration and spontaneous rotational symmetry breaking in PdCrO2
Dan Sun, Dmitry Sokolov, Jack Bartlett +8
In the triangular layered magnet PdCrO2 the intralayer magnetic interactions are strong, however the lattice structure frustrates interlayer interactions. In spite of this, long-ra…
Direct Observation of a Uniaxial Stress-driven Lifshitz Transition in SrRuO
V. Sunko, E. Abarca Morales, I. Marković +11
Pressure represents a clean tuning parameter for traversing the complex phase diagrams of interacting electron systems and as such has proved of key importance in the study of quan…
Ferromagnetic ordering along the hard axis in the Kondo lattice YbIr3Ge7
Binod K. Rai, Macy Stavinoha, J. Banda +7
Ferromagnetic Kondo lattice compounds are far less common than their antiferromagnetic analogs. In this work, we report the discovery of a new ferromagnetic Kondo lattice compound,…
Improved Single-Crystal Growth of SrRuO
J. S. Bobowski, N. Kikugawa, T. Miyoshi +5
High-quality single crystals are essentially needed for the investigation of the novel bulk properties of unconventional superconductors. The availability of such crystals grown by…
Searching for gap zeros in Sr2RuO4 via field-angle-dependent specific-heat measurement
Shunichiro Kittaka, Shota Nakamura, Toshiro Sakakibara +9
The gap structure of SrRuO, which is a longstanding candidate for a chiral p-wave superconductor, has been investigated from the perspective of the dependence of its specif…