Alexander T. Hristov

Symmetry constraints on the elastoresistivity tensor

The elastoresistivity tensor

Critical divergence of the symmetric ( A1g ) nonlinear elastoresistance near the nematic transition in an iron-based superconductor

m_{ij,kl}

Measurement of elastoresistivity at finite frequency by amplitude demodulation

characterizes changes in a materials resistivity due to strain. As a fourth-rank tensor, elastoresistivity can be a uniquely useful probe of the symmetries and character of the electronic state of a solid. We present a symmetry analysis of

Transverse fields to tune an Ising-nematic quantum phase transition

m_{ij,kl}

Elastoresistive and Elastocaloric Anomalies at Magnetic and Electronic-Nematic Critical Points

(both in the presence and absence of a magnetic field) based on the crystalline point group, focusing for pedagogic purposes on the

Transverse fields to tune an Ising-nematic quantum critical transition

D_{4h}

Effect of site disorder on the ground state of a frustrated spin dimer quantum magnet

point group (of relevance to several materials of current interest). We also discuss the relation between

Spin Freezing in The Frustrated Disordered Quantum Magnet Ba

m_{ij,kl}

_{3}

and various thermodynamic susceptibilities, particularly where they are sensitive to critical fluctuations proximate to a critical point at which a point group symmetry is spontaneously broken.

(Mn

We report the observation of a nonlinear elastoresistivity response for the prototypical underdoped iron pnictide