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Iridium valence variation and carrier sign tuning in ( Ca , Ba ) x La 2 – x CuIrO 6 double perovskites
Here, we report the structure and properties of ( Ca , Ba ) x La 2 – x CuIrO 6 . The rock-salt double perovskite structure goes through a P 1 ¯ to P 2 1 / n phase transition with increasing Ba content but not with Ca content. In both cases, the Ir ion is oxidized from 4 + to 5 + with increasing substitution. Transport and magnetic properties measurements reveal that all compositions are insulating with hysteretic spin-freezing magnetic behavior. Seebeck coefficient measurements reveal a large thermopower change from + 176 μ V /K in La 2 CuIrO 6 to – 223 μ V /K with increasing Ba content in Ba x La 2 – x CuIrO 6 . This behavior is modeled well by the Heikes formula for correlated hopping conduction. ( Ca , Ba ) x La 2 – x CuIrO 6 provides a model system for investigations of other systems with similar carrier sign tuning, with applications toward semiconductors and thermoelectric materials.
Deep learning-enhanced variational Monte Carlo method for quantum many-body physics
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Correlated variational treatment of ionization coupled to nuclear motion: Ultrafast pump and ionizing probe of electronic and nuclear dynamics in LiH
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Variational quantum algorithms to estimate rank, quantum entropies, fidelity, and Fisher information via purity minimization
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Unitary block optimization for variational quantum algorithms
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Rayleigh-Gauss-Newton optimization with enhanced sampling for variational Monte Carlo
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Effect of the shot-to-shot variation on charge migration induced by sub-fs x-ray free-electron laser pulses
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Understanding and eliminating spurious modes in variational Monte Carlo using collective variables
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Benchmarking variational quantum eigensolvers for the square-octagon-lattice Kitaev model
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Variational Power of Quantum Circuit Tensor Networks
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From Pulses to Circuits and Back Again: A Quantum Optimal Control Perspective on Variational Quantum Algorithms
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Meta-Variational Quantum Eigensolver: Learning Energy Profiles of Parameterized Hamiltonians for Quantum Simulation
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Correlation-Informed Permutation of Qubits for Reducing Ansatz Depth in the Variational Quantum Eigensolver
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Adaptive Variational Quantum Dynamics Simulations
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Variation in Photovoltaic Energy Rating and Underlying Drivers Across Modules and Climates
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Process Variation Model and Analysis for Domain Wall-Magnetic Tunnel Junction Logic.
Abstract not provided.