Low-order hybridization expansions fail in multi-orbital systems because the least correlated orbital suppresses correlation features across all orbitals through spurious couplings generated by the truncation.
Nitzan \ and\ author M
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Benchmarking of single-stage, series-linear, logarithmic, and cascaded I-V amplifiers for STM-BJ and MCBJ techniques shows practical trade-offs in sensitivity, noise, and dynamic range.
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Validity and Limits of Low Order Hybridization Expansion Approaches for Multi-Orbital Systems
Low-order hybridization expansions fail in multi-orbital systems because the least correlated orbital suppresses correlation features across all orbitals through spurious couplings generated by the truncation.
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Benchmarking Current-to-Voltage Amplifiers for Quantum Transport Measurements
Benchmarking of single-stage, series-linear, logarithmic, and cascaded I-V amplifiers for STM-BJ and MCBJ techniques shows practical trade-offs in sensitivity, noise, and dynamic range.