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Title: Order-Disorder Transitions in ( Ca x Sr 1 - x ) 3 Rh 4 Sn 13

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Argonne National Laboratory (ANL), Lemont, IL (United States). Materials Science Division; Northern Illinois University, DeKalb, IL (United States)
  2. Argonne National Laboratory (ANL), Lemont, IL (United States). Materials Science Division
  3. Argonne National Laboratory (ANL), Lemont, IL (United States)
  4. University of Maryland, College Park, MD (United States); National Institute of Standards and Technology (NIST), Gaithersburg, MD (United States)

The classification of structural phase transitions as displacive or order-disorder in character is usually based on spectroscopic data above the transition. Here, we use single crystal x-ray diffraction to investigate structural correlations in the quasiskutterudites, (CaxSr1-x)3Rh4Sn13, which have a quantum phase transition at x ~ 0.9. Three-dimensional pair distribution functions show that the amplitudes of local atomic displacements are temperature independent below the transition and persist to well above the transition, a signature of order-disorder behavior. The implications for the associated electronic transitions are discussed.

Research Organization:
Argonne National Laboratory (ANL), Lemont, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1868992
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 128; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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