Anisotropic ${H}_{c2}$ , thermodynamic and transport measurements, and pressure dependence of ${T}_{c}$ in ${\mathrm{K}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ single crystals
Abstract
We present a detailed study of single crystalline K_{2}Cr_{3}As_{3} and analyze its thermodynamic and transport properties, anisotropic H_{c2}(T), and initial pressure dependence of T_{c}. In zero field, the temperaturedependent resistivity is metallic. Deviation from a linear temperature dependence is evident below 100 K and a T^{3} dependence is roughly followed from just above T_{c} (~10K) to ~40K. Anisotropic H_{c2}(T) data were measured up to 140 kOe with field applied along and perpendicular to the rodlike crystals. For the applied field perpendicular to the rod, H_{c2}(T) is linear with a slope ~–70 kOe/K. For field applied along the rod, the slope is about –120 kOe/K below 70 kOe. Above 70 kOe, the magnitude of the slope decreases to ~–70 kOe/K. The electronic specific heat coefficient γ, just above T_{c}, is 73 mJ/mol K^{2}; the Debye temperature Θ_{D} is 220 K. As a result, the specific heat jump at the superconducting transition ΔC~2.2γT_{c}. Finally, for hydrostatic pressures up to ~7 kbar, T_{c} decreases under pressure linearly at a rate of –0.034K/kbar.
 Authors:

 Iowa State Univ., Ames, IA (United States)
 Publication Date:
 Research Org.:
 Ames Lab., Ames, IA (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1225544
 Alternate Identifier(s):
 OSTI ID: 1179944
 Report Number(s):
 ISJ8552
Journal ID: ISSN 10980121; PRBMDO
 Grant/Contract Number:
 AC02–07CH11358; AC0207CH11358
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review. B, Condensed Matter and Materials Physics
 Additional Journal Information:
 Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 10980121
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 36 MATERIALS SCIENCE
Citation Formats
Kong, Tai, Bud'ko, Sergey L., and Canfield, Paul C. Anisotropic Hc2 , thermodynamic and transport measurements, and pressure dependence of Tc in K2Cr3As3 single crystals. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.91.020507.
Kong, Tai, Bud'ko, Sergey L., & Canfield, Paul C. Anisotropic Hc2 , thermodynamic and transport measurements, and pressure dependence of Tc in K2Cr3As3 single crystals. United States. doi:10.1103/PhysRevB.91.020507.
Kong, Tai, Bud'ko, Sergey L., and Canfield, Paul C. Fri .
"Anisotropic Hc2 , thermodynamic and transport measurements, and pressure dependence of Tc in K2Cr3As3 single crystals". United States. doi:10.1103/PhysRevB.91.020507. https://www.osti.gov/servlets/purl/1225544.
@article{osti_1225544,
title = {Anisotropic Hc2 , thermodynamic and transport measurements, and pressure dependence of Tc in K2Cr3As3 single crystals},
author = {Kong, Tai and Bud'ko, Sergey L. and Canfield, Paul C.},
abstractNote = {We present a detailed study of single crystalline K2Cr3As3 and analyze its thermodynamic and transport properties, anisotropic Hc2(T), and initial pressure dependence of Tc. In zero field, the temperaturedependent resistivity is metallic. Deviation from a linear temperature dependence is evident below 100 K and a T3 dependence is roughly followed from just above Tc (~10K) to ~40K. Anisotropic Hc2(T) data were measured up to 140 kOe with field applied along and perpendicular to the rodlike crystals. For the applied field perpendicular to the rod, Hc2(T) is linear with a slope ~–70 kOe/K. For field applied along the rod, the slope is about –120 kOe/K below 70 kOe. Above 70 kOe, the magnitude of the slope decreases to ~–70 kOe/K. The electronic specific heat coefficient γ, just above Tc, is 73 mJ/mol K2; the Debye temperature ΘD is 220 K. As a result, the specific heat jump at the superconducting transition ΔC~2.2γTc. Finally, for hydrostatic pressures up to ~7 kbar, Tc decreases under pressure linearly at a rate of –0.034K/kbar.},
doi = {10.1103/PhysRevB.91.020507},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 2,
volume = 91,
place = {United States},
year = {2015},
month = {1}
}
Web of Science
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