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Title: Fermi-surface topologies and low-temperature phases of the filled skutterudite compounds CeOs 4 Sb 12 and NdOs 4 Sb 12

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [4];  [5];  [6];  [7];  [7];  [7]
  1. California State Univ., Fresno, CA (United States). Dept. of Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). National High Magnetic Field Lab.; Univ. of Oxford (United Kingdom). Dept. of Physics
  3. Univ. of Warwick, Coventry (United Kingdom). Dept. of Physics
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). National High Magnetic Field Lab.
  5. Hokkaido Univ., Sapporo (Japan). Dept. of Physics
  6. Univ. of California, San Diego, CA (United States). Dept. of Physics and Center for Advanced Nanoscience
  7. Univ. of California, San Diego, CA (United States). Dept. of Physics
+ Show Author Affiliations

We use MHz conductivity, torque magnetometer, and magnetization measurements to report on single crystals of CeOs 4 Sb 12 and NdOs 4 Sb 12 using temperatures down to 0.5 K and magnetic fields of up to 60 tesla. The field-orientation dependence of the de Haas-van Alphen and Shubnikov-de Haas oscillations is deduced by rotating the samples about the [ 010 ] and [ 0 $$\bar{1}$$ 1 1 ] directions. Our results indicate that NdOs 4 Sb 12 has a similar Fermi surface topology to that of the unusual superconductor PrOs 4 Sb 12 , but with significantly smaller effective masses, supporting the importance of local phonon modes in contributing to the low-temperature heat capacity of NdOs 4 Sb 12 . By contrast, CeOs 4 Sb 12 undergoes a field-induced transition from an unusual semimetal into a high-field, high-temperature state characterized by a single, almost spherical Fermi-surface section. Furthermore, the behavior of the phase boundary and comparisons with models of the band structure lead us to propose that the field-induced phase transition in CeOs 4 Sb 12 is similar in origin to the well-known α - γ transition in Ce and its alloys.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396; FG02-04ER46105; DEFG02-04ER46105
OSTI ID:
1352419
Alternate ID(s):
OSTI ID: 1333607
Report Number(s):
LA-UR-16-27436; PRBMDO; TRN: US1701205
Journal Information:
Physical Review B, Vol. 94, Issue 20; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (2)

Unusual phase boundary of the magnetic-field-tuned valence transition in CeOs 4 Sb 12 journal February 2020
Enhancement of the effective mass at high magnetic fields in CeRhIn 5 journal January 2019

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
High Magnetic Field Science
High Magnetic Fields
skutterudites
quantum criticality