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Title: Anisotropic thermodynamic and transport properties of single-crystalline CaKFe 4 As 4

Abstract

We grew single-crystalline, single-phase CaKFe 4As 4 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 CaKFe 4As 4 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)Fe 2As 2, suggesting that stoichiometric CaKFe 4As 4 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 CaKFe 4As 4 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 c to ≃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.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [3];  [4];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). National High Magnetic Field Lab.
  4. Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1326848
Alternate Identifier(s):
OSTI ID: 1280184
Report Number(s):
IS-J 9081
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07CH11358; AC02-06CH11357; DMR-1157490; GBMF4411
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

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., and Canfield, P. C. Anisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.064501.
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. Anisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4. United States. doi:10.1103/PhysRevB.94.064501.
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., and Canfield, P. C. Mon . "Anisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4". United States. doi:10.1103/PhysRevB.94.064501. https://www.osti.gov/servlets/purl/1326848.
@article{osti_1326848,
title = {Anisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4},
author = {Meier, W. R. and Kong, T. and Kaluarachchi, U. S. and Taufour, V. and Jo, N. H. and Drachuck, G. and Böhmer, A. E. and Saunders, S. M. and Sapkota, A. and Kreyssig, A. and Tanatar, M. A. and Prozorov, R. and Goldman, A. I. and Balakirev, Fedor F. and Gurevich, Alex and Bud'ko, S. L. and Canfield, P. C.},
abstractNote = {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, Tc=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 (Ba1-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, Hc2(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 Tc to ≃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 Tc 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.},
doi = {10.1103/PhysRevB.94.064501},
journal = {Physical Review B},
number = 6,
volume = 94,
place = {United States},
year = {2016},
month = {8}
}

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Works referenced in this record:

Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples
journal, December 2015


Anisotropic thermodynamic and transport properties of single-crystalline Ba 1 x K x Fe 2 As 2 ( x = 0 and 0.45)
journal, July 2008


Field-dependent transport critical current in single crystals of Ba(Fe 1 − x TM x ) 2 As 2 (TM = Co, Ni) superconductors
journal, April 2010


Electrical transport measurements under pressure for BaFe 2 As 2 compounds doped with Co, Cr, or Sn
journal, April 2010


Superconductivity at 35.5 K in K-Doped CaFe2As2
journal, March 2013

  • Wang, D. M.; Shangguan, X. C.; He, J. B.
  • Journal of Superconductivity and Novel Magnetism, Vol. 26, Issue 6
  • DOI: 10.1007/s10948-013-2169-5

Vortices in high-temperature superconductors
journal, October 1994


Anisotropic H c 2 , thermodynamic and transport measurements, and pressure dependence of T c in K 2 Cr 3 As 3 single crystals
journal, January 2015


Iron-Based Layered Superconductor La[O 1- x F x ]FeAs ( x = 0.05−0.12) with T c = 26 K
journal, March 2008

  • Kamihara, Yoichi; Watanabe, Takumi; Hirano, Masahiro
  • Journal of the American Chemical Society, Vol. 130, Issue 11
  • DOI: 10.1021/ja800073m

Anisotropy of the iron pnictide superconductor Ba ( Fe 1 x Co x ) 2 As 2 ( x = 0.074 , T c = 23 K )
journal, March 2009


Divergent Nematic Susceptibility in an Iron Arsenide Superconductor
journal, August 2012


Combined effects of transition metal (Ni and Rh) substitution and annealing/quenching on the physical properties of CaFe 2 As 2
journal, August 2014


Growth of single crystals from metallic fluxes
journal, June 1992


Measurement of the elastoresistivity coefficients of the underdoped iron arsenide Ba(Fe 0.975 Co 0.025 ) 2 As 2
journal, August 2013


Superconductivity in iron compounds
journal, December 2011


Crystallographic phase transition within the magnetically ordered state of Ce 2 Fe 17
journal, August 2007


Iron-based superconductors at high magnetic fields
journal, September 2011


Significant enhancement of upper critical fields by doping and strain in iron-based superconductors
journal, November 2011


Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
journal, May 2016


Gap symmetry and structure of Fe-based superconductors
journal, October 2011


Determination of anisotropic H c 2 up to 60 T in Ba 0.55 K 0.45 Fe 2 As 2 single crystals
journal, December 2008


Vortex phase diagram of Ba ( Fe 0.93 Co 0.07 ) 2 As 2 single crystals
journal, December 2008


First-order structural phase transition in CaFe 2 As 2
journal, July 2008


Magnetization of High-Field Superconductors
journal, January 1964


Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure
journal, May 2009


Challenges and Opportunities for Applications of Unconventional Superconductors
journal, March 2014


New-Structure-Type Fe-Based Superconductors: Ca A Fe 4 As 4 ( A = K, Rb, Cs) and Sr A Fe 4 As 4 ( A = Rb, Cs)
journal, March 2016

  • Iyo, Akira; Kawashima, Kenji; Kinjo, Tatsuya
  • Journal of the American Chemical Society, Vol. 138, Issue 10
  • DOI: 10.1021/jacs.5b12571

Pressure-induced volume-collapsed tetragonal phase of CaFe 2 As 2 as seen via neutron scattering
journal, November 2008


Developments on Susceptibility and Magnetization Measurements under High Hydrostatic Pressure
journal, January 2007

  • Lebre Alireza, Patricia; Barakat, Samira; Cumberlidge, Anne-Marie
  • Journal of the Physical Society of Japan, Vol. 76, Issue Suppl.A
  • DOI: 10.1143/JPSJS.76SA.216

Fermi surface reconstruction in ( Ba 1 x K x ) Fe 2 As 2   ( 0.44 x 1 ) probed by thermoelectric power measurements
journal, June 2014


Magnetic measurements of the upper critical field of YBa 2 Cu 3 O 7 δ single crystals
journal, April 1989


Superconductivity at 38 K in the Iron Arsenide ( Ba 1 x K x ) Fe 2 As 2
journal, September 2008


Experimental setup for the measurement of the thermoelectric power in zero and applied magnetic field
journal, March 2010

  • Mun, Eundeok; Bud'ko, Sergey L.; Torikachvili, Milton S.
  • Measurement Science and Technology, Vol. 21, Issue 5
  • DOI: 10.1088/0957-0233/21/5/055104

FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe 2 As 2
journal, August 2010


Superconductivity and Crystal Structures of (Ba 1− x K x )Fe 2 As 2 ( x =0-1)
journal, September 2008

  • Rotter, Marianne; Pangerl, Michael; Tegel, Marcus
  • Angewandte Chemie International Edition, Vol. 47, Issue 41
  • DOI: 10.1002/anie.200803641

X-Ray diffraction on large single crystals using a powder diffractometer
journal, June 2016


New Fe-based superconductors: properties relevant for applications
journal, February 2010


Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe 1 x Co x ) 2 As 2
journal, June 2012


Magneto-optical study of Ba ( Fe 1 x M x ) 2 As 2 ( M = Co and Ni) single crystals irradiated with heavy ions
journal, March 2010


Superconductivity at 22 K in Co-Doped BaFe 2 As 2 Crystals
journal, September 2008


Note on supraconductivity
journal, May 1934


Resistivity anisotropy of A Fe 2 As 2 ( A = Ca , Sr, Ba): Direct versus Montgomery technique measurements
journal, April 2009


The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
journal, October 2010