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A sharp increase in the density of states in PbTe approaching a saddle point in the band structure
P. Walmsley, D. M. Abrams, J. Straquadine +4
PbTe is a leading mid-range thermoelectric material with a that has been enhanced by, amongst other methods, band engineering. Here we present an experimental study of the Hal…
Elastoresistive and Elastocaloric Anomalies at Magnetic and Electronic-Nematic Critical Points
Alexander T. Hristov, Matthias S. Ikeda, Johanna C. Palmstrom +2
Using Ba(FeCo)As as an exemplar material exhibiting second order electronic-nematic and antiferromagnetic transitions, we present measurements that re…
Direct spectroscopic evidence for mixed-valence Tl in the low carrier-density superconductor PbTlTe
P. Walmsley, C. Liu, A. D. Palczewski +4
Upon doping with Tl the narrow band-gap semiconductor PbTe exhibits anomalously high temperature superconductivity despite a very low carrier density as well as signatures of the K…
Disentangling amplitude and phase dynamics of a charge density wave in a photo-induced phase transition
Alfred Zong, Anshul Kogar, Ya-Qing Bie +16
Upon excitation with an intense ultrafast laser pulse, a symmetry-broken ground state can undergo a non-equilibrium phase transition through pathways dissimilar from those in therm…
Competing soft phonon modes at the charge-density-wave transitions in DyTe
M. Maschek, D. A. Zocco, S. Rosenkranz +6
The family of rare-earth tritellurides RTe features charge-density-wave (CDW) order related to strongly momentum-dependent electron-phonon coupling. Similar to other CDW compou…
Symmetric and antisymmetric strain as continuous tuning parameters for electronic nematic order
Matthias S. Ikeda, Thanapat Worasaran, Johanna C. Palmstrom +2
We report the separate response of the critical temperature of the nematic phase transition to symmetric and antisymmetric strains for the prototypical underdoped iron…