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Title: Electrical transport properties of single-crystal CaB 6 , SrB 6 , and BaB 6

Journal Article · · Physical Review B
 [1];  [2];  [3];  [2]
  1. Univ. of Zaragoza (Spain). Dept. of Condensed Material Physics, Inst. of Materials Science
  2. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  3. Florida State Univ., Tallahassee, FL (United States). Dept. of Physics

We measure the electrical resistivity and Hall effect of alkaline-earth-metal hexaboride single crystals as a function of temperature, hydrostatic pressure, and magnetic field. The transport properties vary weakly with the external parameters and are modeled in terms of intrinsic variable-valence defects. These defects can stay either in (1) delocalized shallow levels or in (2) localized levels resonant with the conduction band, which can be neutral or negatively charged. Satisfactory agreement is obtained for electronic transport properties in a broad temperature and pressure range, though fitting the magnetoresistance is less straightforward and a combination of various mechanisms is needed to explain the field and temperature dependences.

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; FG02-98ER45707
OSTI ID:
1392877
Alternate ID(s):
OSTI ID: 1326127
Report Number(s):
LA-UR-17-23575; PRBMDO; TRN: US1702708
Journal Information:
Physical Review B, Vol. 94, Issue 12; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (2)

Localized magnetic moments in metallic SrB 6 single crystals journal December 2018
Understanding low-temperature bulk transport in samarium hexaboride without relying on in-gap bulk states journal May 2017

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