Anisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4

Meier, W. R.; Kong, T.; Kaluarachchi, U. S.; Taufour, V.; Jo, N. H.; Drachuck, G.; Böhmer, A. E.; Saunders, S. M.; Sapkota, A.; Kreyssig, A.; Tanatar, M. A.; Prozorov, R.; Goldman, A. I.; Balakirev, Fedor F.; Gurevich, Alex; Bud'ko, S. L.; Canfield, P. C.

doi:10.1103/PhysRevB.94.064501

Anisotropic thermodynamic and transport properties of single-crystalline ${CaKFe}_{4} {As}_{4}$

Journal Article · Mon Aug 01 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.064501· OSTI ID:1326848

Meier, W. R. ^[1]; Kong, T. ^[1]; Kaluarachchi, U. S. ^[1]; Taufour, V. ^[2]; Jo, N. H. ^[1]; Drachuck, G. ^[1]; Böhmer, A. E. ^[2]; Saunders, S. M. ^[1]; Sapkota, A. ^[1]; Kreyssig, A. ^[1]; Tanatar, M. A. ^[1]; Prozorov, R. ^[1]; Goldman, A. I. ^[1]; Balakirev, Fedor F. ^[3]; Gurevich, Alex ^[4]; Bud'ko, S. L. ^[1]; Canfield, P. C. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Ames Lab. and Iowa State Univ., Ames, IA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). National High Magnetic Field Lab.
Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics

We grew single-crystalline, single-phase CaKFe₄As₄ out of a high-temperature, quaternary melt. Temperature-dependent measurements of x-ray diffraction, anisotropic electrical resistivity, elastoresistivity, thermoelectric power, Hall effect, magnetization, and specific heat, combined with field-dependent measurements of electrical resistivity and field and pressure-dependent measurements of magnetization indicate that CaKFe₄As₄ is an ordered, stoichiometric, Fe-based superconductor with a superconducting critical temperature, T_c=35.0±0.2 K. Other than superconductivity, there is no indication of any other phase transition for 1.8K≤T≤300 K. All of these thermodynamic and transport data reveal striking similarities to those found for optimally or slightly overdoped (Ba_1-xKx)Fe₂As₂, suggesting that stoichiometric CaKFe₄As₄ is intrinsically close to what is referred to as “optimal-doped” on a generalized, Fe-based superconductor, phase diagram. Furthermore, the anisotropic superconducting upper critical field, H_c2(T), of CaKFe₄As₄ was determined up to 630 kOe. The anisotropy parameter γ(T)=H$$⊥\atop{c2}$$/H$$∥\atop{c2}$$, for H applied perpendicular and parallel to the c axis, decreases from ≃2.5 at T_cto ≃1.5 at 25 K, which can be explained by interplay of paramagnetic pair breaking and orbital effects. The slopes of dH$$∥\atop{c2}$$/dT≃-44 kOe/K and dH$$⊥\atop{c2}$$/dT≃-109 kOe/K at T_c yield an electron mass anisotropy of m_⊥/m_∥≃1/6 and short Ginzburg-Landau coherence lengths ξ_∥(0)≃5.8Å and ξ_⊥(0)≃14.3Å. Finally, the value of H$$⊥\atop{c2}$$(0) can be extrapolated to ≃920 kOe, well above the BCS paramagnetic limit.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-06CH11357; AC02-07CH11358

OSTI ID:: 1326848

Alternate ID(s):: OSTI ID: 1338222
OSTI ID: 1280184

Report Number(s):: IS--J 9081

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 6 Vol. 94; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Influence of multiband sign-changing superconductivity on vortex cores and vortex pinning in stoichiometric high- T c CaKFe 4 As 4 Fente, Antón; Meier, William R.; Kong, Tai Physical Review B, Vol. 97, Issue 13 https://doi.org/10.1103/physrevb.97.134501	journal	April 2018
In-plane magnetic penetration depth of superconducting CaKFe 4 As 4 Khasanov, Rustem; Meier, William R.; Wu, Yun Physical Review B, Vol. 97, Issue 14 https://doi.org/10.1103/physrevb.97.140503	journal	April 2018
Robust s ± pairing in CaK ( Fe 1 − x Ni x ) 4 As 4 ( x = 0 and 0.05) from the response to electron irradiation Teknowijoyo, S.; Cho, K.; Kończykowski, M. Physical Review B, Vol. 97, Issue 14 https://doi.org/10.1103/physrevb.97.140508	journal	April 2018
Pressure-temperature phase diagrams of CaK ( Fe 1 − x Ni x ) 4 As 4 superconductors Xiang, Li; Meier, William R.; Xu, Mingyu Physical Review B, Vol. 97, Issue 17 https://doi.org/10.1103/physrevb.97.174517	journal	May 2018
Antiferromagnetic order in CaK ( Fe 1 − x Ni x ) 4 As 4 and its interplay with superconductivity Kreyssig, A.; Wilde, J. M.; Böhmer, A. E. Physical Review B, Vol. 97, Issue 22 https://doi.org/10.1103/physrevb.97.224521	journal	June 2018
Trends in pressure-induced layer-selective half-collapsed tetragonal phases in the iron-based superconductor family A e A Fe 4 As 4 Borisov, Vladislav; Canfield, Paul C.; Valentí, Roser Physical Review B, Vol. 98, Issue 6 https://doi.org/10.1103/physrevb.98.064104	journal	August 2018
Anisotropic superconductivity and magnetism in single-crystal RbEuFe 4 As 4 Smylie, M. P.; Willa, K.; Bao, J. -K. Physical Review B, Vol. 98, Issue 10 https://doi.org/10.1103/physrevb.98.104503	journal	September 2018
High- T c superconductivity in CaKFe 4 As 4 in absence of nematic fluctuations Zhang, W. -L.; Meier, W. R.; Kong, T. Physical Review B, Vol. 98, Issue 14 https://doi.org/10.1103/physrevb.98.140501	journal	October 2018
Coexistence of superconductivity and magnetism in CaK ( Fe 1 − x Ni x ) 4 As 4 as probed by 57 Fe Mössbauer spectroscopy Bud'ko, Sergey L.; Kogan, Vladimir G.; Prozorov, Ruslan Physical Review B, Vol. 98, Issue 14 https://doi.org/10.1103/physrevb.98.144520	journal	October 2018
Large and significantly anisotropic critical current density induced by planar defects in CaKFe 4 As 4 single crystals Pyon, Sunseng; Takahashi, Ayumu; Veshchunov, Ivan Physical Review B, Vol. 99, Issue 10 https://doi.org/10.1103/physrevb.99.104506	journal	March 2019
Anisotropy induced vortex lattice rearrangement in CaKFe 4 As 4 Khasanov, Rustem; Meier, William R.; Bud'ko, Sergey L. Physical Review B, Vol. 99, Issue 14 https://doi.org/10.1103/physrevb.99.140507	journal	April 2019
Strongly fluctuating moments in the high-temperature magnetic superconductor RbEuFe 4 As 4 Willa, K.; Willa, R.; Bao, J. -K. Physical Review B, Vol. 99, Issue 18 https://doi.org/10.1103/physrevb.99.180502	journal	May 2019
Enhancement of the Superconducting Gap by Nesting in CaKFe 4 As 4 : A New High Temperature Superconductor Mou, Daixiang; Kong, Tai; Meier, William R. Physical Review Letters, Vol. 117, Issue 27 https://doi.org/10.1103/physrevlett.117.277001	journal	December 2016
Odd and Even Modes of Neutron Spin Resonance in the Bilayer Iron-Based Superconductor CaKFe 4 As 4 Xie, Tao; Wei, Yuan; Gong, Dongliang Physical Review Letters, Vol. 120, Issue 26 https://doi.org/10.1103/physrevlett.120.267003	journal	June 2018
Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK ( Fe 1 − x Ni x ) 4 As 4 Revealed by NMR Ding, Q. -P.; Meier, W. R.; Cui, J. Physical Review Letters, Vol. 121, Issue 13 https://doi.org/10.1103/physrevlett.121.137204	journal	September 2018
Optimization of the crystal growth of the superconductor CaKFe 4 As 4 from solution in the FeAs − CaFe 2 As 2 − KFe 2 As 2 system Meier, W. R.; Kong, T.; Bud'ko, S. L. Physical Review Materials, Vol. 1, Issue 1 https://doi.org/10.1103/physrevmaterials.1.013401	journal	June 2017
Ultrahigh critical current densities, the vortex phase diagram, and the effect of granularity of the stoichiometric high- T c superconductor CaKFe 4 As 4 Singh, Shiv J.; Bristow, Matthew; Meier, William R. Physical Review Materials, Vol. 2, Issue 7 https://doi.org/10.1103/physrevmaterials.2.074802	journal	July 2018
⁷⁵As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe_0.967Ni_0.033)₄As₄ Ding, Qing Ping; Meier, William R.; Böhmer, Anna E. Solid State Phenomena, Vol. 289 https://doi.org/10.4028/www.scientific.net/ssp.289.148	journal	April 2019
Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor Meier, W. R.; Ding, Q. -P.; Kreyssig, A. arXiv https://doi.org/10.48550/arxiv.1706.01067	text	January 2017
Spatially - resolved study of the Meissner effect in superconductors using NV-centers-in-diamond optical magnetometry Nusran, N. M.; Joshi, K. R.; Cho, K. arXiv https://doi.org/10.48550/arxiv.1709.02769	text	January 2017
Superconducting Phase-Diagram of H3S under High Magnetic Fields Mozaffari, Shirin; Sun, Dan; Minkov, Vasily S. arXiv https://doi.org/10.48550/arxiv.1901.11208	text	January 2019
On temperature-dependent anisotropies of upper critical field and London penetration depth Kogan, V. G.; Prozorov, R.; Koshelev, A. E. arXiv https://doi.org/10.48550/arxiv.1904.01161	text	January 2019
Ultrahigh Elastically Compressible and Strain-Engineerable Intermetallic Compounds Under Uniaxial Mechanical Loading Song, Gyuho; Borisov, Vladislav; Meier, William R. arXiv https://doi.org/10.48550/arxiv.1904.02256	preprint	January 2019
Unique defect structure and advantageous vortex pinning properties in superconducting CaKFe4As4 Ishida, Shigeyuki; Iyo, Akira; Ogino, Hiraku arXiv https://doi.org/10.48550/arxiv.1907.04718	text	January 2019

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