Publication Type
Conference Paper
Journal Name
Physica B: Condensed Matter
Publication Date
Page Numbers
479 to 482
Volume
536
Conference Name
International Conference on Strongly Correlated Electron Systems (SCES 2017)
Conference Location
Prague, Czech Republic
Conference Sponsor
Various
Conference Date
-
Abstract
Structural properties of LaCu6−xAgx have been investigated using neutron and x-ray diffraction, and resonant ultrasound spectroscopy (RUS) measurements. Diffraction measurements indicate a continuous structural transition from orthorhombic (Pnma) to monoclinic (P2₁/C) structure. RUS measurements show softening of natural frequencies at the structural transition, consistent with the elastic nature of the structural ground state. The structural transition temperatures in LaCu6−xAgx decrease with Ag composition until the monoclinic phase is completely suppressed at xc=0.225. All of the evidence is consistent with the presence of an elastic quantum critical point in LaCu6−xAgx.
