Spin excitations and the Fermi surface of superconducting FeS
Source abstract
Abstract
Abstract High-temperature superconductivity occurs near antiferromagnetic instabilities and the nematic state. Debate remains on the origin of nematic order in FeSe and its relation with superconductivity. Here, we use transport, neutron scattering and Fermi surface measurements to demonstrate that hydrothermo grown superconducting FeS, an isostructure of FeSe, is a tetragonal paramagnet without nematic order and with a quasiparticle mass significantly reduced from that of FeSe. Only stripe-type spin excitations are observed up to 100 meV. No direct coupling between spin excitations and superconductivity in FeS is found, suggesting that FeS is less correlated and the nematic order in FeSe is due to competing checkerboard and stripe spin fluctuations.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Iron-based superconductors research · Physics of Superconductivity and Magnetism · SAS software applications and methods
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. Scalapino, D. J. A common thread: the pairing interaction for unconventional superconductors. Rev. Mod. Phys. 84, 1383–1417 (2012).10.1103/RevModPhys.84.1383 ↗
2. Dai, P. C. Antiferromagnetic order and spin dynamics in iron based superconductors. Rev. Mod. Phys. 87, 855–896 (2015).10.1103/RevModPhys.87.855 ↗
3. Si, Q., Yu, R. & Abrahams, E. High temperature superconductivity in iron pnictides and chalcogenides. Nat. Rev. Mater. 1, 16017 (2016).10.1038/natrevmats.2016.17 ↗
4. Fradkin, E., Kivelson, S. A., Lawler, M. J., Eisenstein, J. P. & Mackenzie, A. P. Nematic Fermi fluids in condensed matter physics. Annu. Rev. Condens. Matter Phys. 1, 153–178 (2010).10.1146/annurev-conmatphys-070909-103925 ↗
5. Fisher, I. R., Degiorgi, L. & Shen, Z. X. In-plane electronic anisotropy of underdoped 122 Fe-arsenide superconductors revealed by measurements of detwinned single crystals. Rep. Prog. Phys. 74, 124506 (2011).10.1088/0034-4885/74/12/124506 ↗
6. Fernandes, R. M., Chubukov, A. V. & Schmalian, J. What drives nematic order in iron-based superconductors? Nat. Phys. 10, 97–104 (2014).10.1038/nphys2877 ↗
7. Böhmer, A. E. & Meingast, C. Electronic nematic susceptibility of iron-based superconductors. C. R. Phys. 17, 90–112 (2016).10.1016/j.crhy.2015.07.001 ↗
8. Lu, X. Y. et al. Nematic spin correlations in the tetragonal state of uniaxial-strained BaFe2x Ni x As2. Science 345, 657–660 (2014).10.1126/science.1251853 ↗
9. Dai, J., Si, Q., Zhu, J.-X. & Abrahams, E. Iron pnictides as a new setting for quantum criticality. Proc. Natl. Acad. Sci. USA 106, 4118–4121 (2009).10.1073/pnas.0900886106 ↗
10. Kuo, H.-H., Chu, J.-H., Palmstrom, J. C., Kivelson, S. A. & Fisher, I. R. Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors. Science 352, 958–962 (2016).10.1126/science.aab0103 ↗
11. McQueen, T. et al. Tetragonal-to-orthorhombic structural phase transition at 90 K in the superconductor Fe1.01Se. Phys. Rev. Lett. 103, 057002 (2009).10.1103/PhysRevLett.103.057002 ↗
12. Baek, S. H. et al. Orbital-driven nematicity in FeSe. Nat. Mater. 14, 210–214 (2015).10.1038/nmat4138 ↗
13. Böhmer, A. E. et al. Origin of the tetragonal-to-orthorhombic phase transition in FeSe: A combined thermodynamic and NMR study of nematicity. Phys. Rev. Lett. 114, 027001 (2015).10.1103/PhysRevLett.114.027001 ↗
14. Rahn, M. C., Ewings, R. A., Sedlmaier, S. J., Clarke, S. J. & Boothroyd, A. T. Strong (π,0) Spin fluctuations in βFeSe observed by neutron spectroscopy. Phys. Rev. B 91, 180501(R) (2015).10.1103/PhysRevB.91.180501 ↗
15. Wang, Q. et al. Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe. Nat. Mater. 15, 159–163 (2016).10.1038/nmat4492 ↗
16. Wang, Q. et al. Magnetic ground state of FeSe. Nat. Commun. 7, 12182 (2016).10.1038/ncomms12182 ↗
17. Yu, R. & Si, Q. Antiferroquadrupolar and Ising-nematic orders of a frustrated bilinear-biquadratic Heisenberg model and implications for the magnetism of FeSe. Phys. Rev. Lett. 115, 116401 (2015).10.1103/PhysRevLett.115.116401 ↗
18. Wang, F., Kivelson, S. A. & Lee, D.-H. Nematicity and quantum paramagnetism in FeSe. Nat. Phys 11, 959–963 (2015).10.1038/nphys3456 ↗
19. Glasbrenner, J. K. et al. Effect of magnetic frustration on nematicity and superconductivity in iron chalcogenides. Nat. Phys 11, 953–958 (2015).10.1038/nphys3434 ↗
20. Cao, H.-Y., Chen, S., Xiang, H. & Gong, X.-G. Antiferromagnetic ground state with pair-checkerboard order in FeSe. Phys. Rev. B 91, 020504 (2015).10.1103/PhysRevB.91.020504 ↗
21. Chubukov, A. V., Fernandes, R. M. & Schmalian, J. Origin of nematic order in FeSe. Phys. Rev. B 91, 201105 (2015).10.1103/PhysRevB.91.201105 ↗
22. Yamakawa, Y., Onari, S. & Kontani, H. Nematicity and magnetism in FeSe and other families of Fe-based superconductors. Phys. Rev. X 6, 021032 (2016).
23. Lai, X. et al. Observation of superconductivity in tetragonal FeS. J. Am. Chem. Soc. 137, 10148 (2015).10.1021/jacs.5b06687 ↗
24. Borg, Ch. K. H. et al. Strong anisotropy in nearly ideal tetrahedral superconducting FeS single crystals. Phys. Rev. B 93, 094522 (2016).10.1103/PhysRevB.93.094522 ↗
25. Watson, M. D. et al. Suppression of orbital ordering by chemical pressure in FeSe1−x S x . Phys. Rev. B 92, 121108 (2015).10.1103/PhysRevB.92.121108 ↗
26. Wang, L. R. et al. Superconductivity-enhanced nematicity and ‘s+d′ gap symmetry in Fe(Se1−x S x ). Phys. Status Solidi B 254, 1600153 (2017). doi:10.1002/pssb.201600153.10.1002/pssb.201600153 ↗
27. Subedi, A., Zhang, L., Singh, D. J. & Du, M. H. Density functional study of FeS, FeSe, and FeTe: electronic structure, magnetism, phonons, and superconductivity. Phys. Rev. B 78, 134514 (2008).10.1103/PhysRevB.78.134514 ↗
28. Yin, Z. P., Haule, K. & Kotliar, G. Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides. Nat. Mater. 10, 932–935 (2011).10.1038/nmat3120 ↗
29. Yin, Z. P., Haule, K. & Kotliar, G. Spin dynamics and orbital-antiphase pairing symmetry in iron-based superconductors. Nat. Phys 10, 845–850 (2014).10.1038/nphys3116 ↗
30. Lu, X. Y. et al. Impact of uniaxial pressure on structural and magnetic phase transitions in electron-doped iron pnictides. Phys. Rev. B 93, 134519 (2016).10.1103/PhysRevB.93.134519 ↗
31. Hosoi, S. et al. Nematic quantum critical point without magnetism in FeSe1−x S x superconductors. Proc. Natl. Acad. Sci. USA 113, 8139–8143 (2016).10.1073/pnas.1605806113 ↗
32. Watson, M. D. et al. Emergence of the nematic electronic state in FeSe. Phys. Rev. B 91, 155106 (2015).10.1103/PhysRevB.91.155106 ↗
33. Tanatar, M. A. et al. Origin of the resistivity anisotropy in the nematic phase of FeSe. Phys. Rev. Lett. 117, 127001 (2016).10.1103/PhysRevLett.117.127001 ↗
34. Holenstein, S. et al. Coexistence of low-moment magnetism and superconductivity in tetragonal FeS and suppression of T c under pressure. Phys. Rev. B 93, 140506 (2016).10.1103/PhysRevB.93.140506 ↗
35. Kirschner, F. K. K. et al. Robustness of superconductivity to competing magnetic phases in tetragonal FeS. Phys. Rev. B 94, 134509 (2016).10.1103/PhysRevB.94.134509 ↗
36. Hu, D. et al. Spin excitations in optimally P-doped BaFe2(As0.7P0.3)2 superconductor. Phys. Rev. B 94, 094504 (2016).10.1103/PhysRevB.94.094504 ↗
37. Terashima, T. et al. Anomalous Fermi surface in FeSe seen by Shubnikov–de Haas oscillation measurements. Phys. Rev. B 90, 144517 (2014).10.1103/PhysRevB.90.144517 ↗
38. Terashima, T. et al. Upper critical field and quantum oscillations in tetragonal superconducting FeS. Phys. Rev. B 94, 100503 (2016).10.1103/PhysRevB.94.100503 ↗
39. Kasahara, S. et al. Field-induced superconducting phase of FeSe in the BCS-BEC cross-over. Proc. Natl. Acad. Sci. USA 111, 16309–16313 (2014).10.1073/pnas.1413477111 ↗
40. Kasahara, S. et al. Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS-BEC crossover. Nat. Commun. 7, 12843 (2016).10.1038/ncomms12843 ↗