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Title: LaCu 6-xAg x: A promising host of an elastic quantum critical point

Abstract

Structural properties of LaCu 6-xAg x 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 LaCu 6-xAg x decrease with Ag composition until the monoclinic phase is completely suppressed at x c=0.225. All of the evidence is consistent with the presence of an elastic quantum critical point in LaCu 6-xAg x.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1];  [2];  [1]; ORCiD logo [1]
  1. ORNL
  2. University of Tennessee, Knoxville (UTK)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1435319
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Name: Physica. B, Condensed Matter; Journal Volume: 536; Journal Issue: none; Conference: International Conference on Strongly Correlated Electron Systems (SCES 2017), Prague, Czech Republic, 7/17/2017 4:00:00 AM-7/21/2017 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Poudel, Lekh, Dela Cruz, Clarina R., Koehler, Michael R., McGuire, Michael A., Keppens, Veerle, Mandrus, David, and Christianson, Andrew D.. LaCu6-xAgx: A promising host of an elastic quantum critical point. United States: N. p., 2018. Web. doi:10.1016/j.physb.2017.08.066.
Poudel, Lekh, Dela Cruz, Clarina R., Koehler, Michael R., McGuire, Michael A., Keppens, Veerle, Mandrus, David, & Christianson, Andrew D.. LaCu6-xAgx: A promising host of an elastic quantum critical point. United States. doi:10.1016/j.physb.2017.08.066.
Poudel, Lekh, Dela Cruz, Clarina R., Koehler, Michael R., McGuire, Michael A., Keppens, Veerle, Mandrus, David, and Christianson, Andrew D.. Tue . "LaCu6-xAgx: A promising host of an elastic quantum critical point". United States. doi:10.1016/j.physb.2017.08.066. https://www.osti.gov/servlets/purl/1435319.
@article{osti_1435319,
title = {LaCu6-xAgx: A promising host of an elastic quantum critical point},
author = {Poudel, Lekh and Dela Cruz, Clarina R. and Koehler, Michael R. and McGuire, Michael A. and Keppens, Veerle and Mandrus, David and Christianson, Andrew D.},
abstractNote = {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.},
doi = {10.1016/j.physb.2017.08.066},
journal = {Physica. B, Condensed Matter},
number = none,
volume = 536,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2018},
month = {Tue May 01 00:00:00 EDT 2018}
}

Conference:
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