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Multiorbital singlet pairing and superconductivity
Emilian M. Nica, Qimiao Si
Recent experiments in multiband Fe-based and heavy-fermion superconductors have challenged the long-held dichotomy between simple - and -wave spin-singlet pairing states. Her…
Weyl-Kondo semimetals in nonsymmorphic systems
Sarah E. Grefe, Hsin-Hua Lai, Silke Paschen +1
There is considerable current interest to explore electronic topology in strongly correlated metals, with heavy fermion systems providing a promising setting. Recently, a Weyl-Kond…
Comment on "Tuning low-energy scales in YbRhSi by non-isoelectronic substitution and pressure"
Steffen Wirth, Silke Paschen, Qimiao Si +1
In Ref. 1, Schubert et al. [Phys. Rev. Research 1, 032004 (2019)] reported measurements of the isothermal magnetoresistance of Fe- and Ni-substituted YbRhSi, based on which…
Quantum critical nematic fluctuations and spin excitation anisotropy in iron pnictides
Chia-Chuan Liu, Elihu Abrahams, Qimiao Si
Quantum criticality in iron pnictides involves both the nematic and antiferromagnetic degrees of freedom, but the relationship between the two types of fluctuations has yet to be c…
Hall coefficient diagnostics of surface state in pressurized SmB6
Yazhou Zhou, Priscila F. S. Rosa, Jing Guo +9
In this study, we report the first results of the high-pressure Hall coefficient (RH) measurements in the putative topological Kondo insulator SmB6 up to 37 GPa. Below 10 GPa, our…
Anisotropic magnetic excitations of a frustrated bilinear-biquadratic spin model -- Implications for spin waves of detwinned iron pnictides
Changle Liu, Xingye Lu, Pengcheng Dai +2
Elucidating the nature of spin excitations is important to understanding the mechanism of superconductivity in the iron pnictides. Motivated by recent inelastic neutron scattering…