Expansion of the tetragonal magnetic phase with pressure in the iron arsenide superconductor Ba1-xKxFe2As2

Hassinger, Elena; Gredat, G.; Valade, F.; de Cotret, S. Rene; Cyr-Choiniere, O.; Juneau-Fecteau, A.; Reid, J. -Ph.; Kim, H.; Tanatar, M. A.; Prozorov, R.; Shen, B.; Wen, H. -H.; Doiron-Leyraud, N.; Taillefer, Louis

doi:10.1103/PhysRevB.93.144401

Title: Expansion of the tetragonal magnetic phase with pressure in the iron arsenide superconductor ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$

Journal Article · Fri Apr 01 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.144401· OSTI ID:1337668

Hassinger, Elena ^[1]; Gredat, G. ^[1]; Valade, F. ^[1]; de Cotret, S. Rene ^[1]; Cyr-Choiniere, O. ^[1]; Juneau-Fecteau, A. ^[1]; Reid, J. -Ph. ^[1]; Kim, H. ^[2]; Tanatar, M. A. ^[2]; Prozorov, R. ^[3]; Shen, B. ^[4]; Wen, H. -H. ^[5]; Doiron-Leyraud, N. ^[1]; Taillefer, Louis ^[6]

Univ. de Sherbrooke, Sherbrooke, QC (Canada)
Ames Lab., Ames, IA (United States)
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Nanjing Univ., Nanjing (China)
Nanjing Univ., Nanjing (China); Canadian Institute for Advanced Research, Toronto, ON (Canada)
Univ. de Sherbrooke, Sherbrooke, QC (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada)

In the temperature-concentration phase diagram of most iron-based superconductors, antiferromagnetic order is gradually suppressed to zero at a critical point, and a dome of superconductivity forms around that point. The nature of the magnetic phase and its fluctuations is of fundamental importance for elucidating the pairing mechanism. In Ba_1–xK_xFe₂As₂ and Ba_1–xNa_xFe₂As₂, it has recently become clear that the usual stripelike magnetic phase, of orthorhombic symmetry, gives way to a second magnetic phase, of tetragonal symmetry, near the critical point, in the range from x = 0.24 to x = 0.28 for Ba_1–xK_xFe₂As₂. In a prior study, an unidentified phase was discovered for x < 0.24 but under applied pressure, whose onset was detected as a sharp anomaly in the resistivity. Here we report measurements of the electrical resistivity of Ba_1–xK_xFe₂As₂ under applied hydrostatic pressures up to 2.75 GPa, for x = 0.22, 0.24, and 0.28. The critical pressure above which the unidentified phase appears is seen to decrease with increasing x and vanish at x = 0.24, thereby linking the pressure-induced phase to the tetragonal magnetic phase observed at ambient pressure. In the temperature-concentration phase diagram of Ba_1–xK_xFe₂As₂, we find that pressure greatly expands the tetragonal magnetic phase, while the stripelike phase shrinks. As a result, this reveals that pressure may be a powerful tuning parameter with which to explore the interplay between magnetism and superconductivity in this material.

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Research Organization:: Ames Lab., Ames, IA (United States)

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

Grant/Contract Number:: AC02-07CH11358; 2011CBA00100

OSTI ID:: 1337668

Alternate ID(s):: OSTI ID: 1245047

Report Number(s):: IS-J-8986; PRBMDO

Journal Information:: Physical Review B, Vol. 93, Issue 14; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor Meier, William R.; Ding, Qing-Ping; Kreyssig, Andreas npj Quantum Materials, Vol. 3, Issue 1 https://doi.org/10.1038/s41535-017-0076-x	journal	February 2018
Strain tuning and anisotropic spin correlations in iron-based systems Willa, Roland; Fritz, Max; Schmalian, Jörg Physical Review B, Vol. 100, Issue 8 https://doi.org/10.1103/physrevb.100.085106	journal	August 2019
Optical and photoemission investigation of structural and magnetic transitions in the iron-based superconductor ${Sr}_{0.67} {Na}_{0.33} {Fe}_{2} {As}_{2}$ Yang, R.; Huang, J. W.; Zaki, N. Physical Review B, Vol. 100, Issue 23 https://doi.org/10.1103/physrevb.100.235132	journal	December 2019
Preferred Magnetic Excitations in the Iron-Based ${Sr}_{1 - x} {Na}_{x} {Fe}_{2} {As}_{2}$ Superconductor Guo, Jianqing; Yue, Li; Iida, Kazuki Physical Review Letters, Vol. 122, Issue 1 https://doi.org/10.1103/physrevlett.122.017001	journal	January 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
Strain tuning and anisotropic spin correlations in iron-based systems Willa, Roland; Fritz, Max; Schmalian, Jörg arXiv https://doi.org/10.48550/arxiv.1904.05583	text	January 2019

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Title: Expansion of the tetragonal magnetic phase with pressure in the iron arsenide superconductor ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$