Strain-Driven Approach to Quantum Criticality in AFe2As2 with A=K, Rb, and Cs

Eilers, Felix; Grube, Kai; Zocco, Diego A.; Wolf, Thomas; Merz, Michael; Schweiss, Peter; Heid, Rolf; Eder, Robert; Yu, Rong; Zhu, Jianxin; Si, Qimiao; Shibauchi, Takasada; Lohneysen, Hilbert v.

doi:10.1103/PhysRevLett.116.237003

Title: Strain-Driven Approach to Quantum Criticality in AFe₂As₂ with A=K, Rb, and Cs

Journal Article · Wed Jun 08 00:00:00 EDT 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.116.237003· OSTI ID:1414118

Eilers, Felix ^[1]; Grube, Kai ^[1]; Zocco, Diego A. ^[2]; Wolf, Thomas ^[1]; Merz, Michael ^[1]; Schweiss, Peter ^[1]; Heid, Rolf ^[1]; Eder, Robert ^[1]; Yu, Rong ^[3];

^[4]; Si, Qimiao ^[5]; Shibauchi, Takasada ^[6]; Lohneysen, Hilbert v. ^[7]

Karlsruhe Inst. of Technology (KIT) (Germany). Inst. fur Technologie
Karlsruher Institut fur Technologie, Germany
Renmin Univ. of China, Beijing (China). Dept. of Physics
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
Univ. of Tokyo (Japan). Dept. of Advanced Materials Science; Kyoto Univ. (Japan). Dept. of Physics
Karlsruhe Inst. of Technology (KIT) (Germany). Inst. fur Technologie; Karlsruhe Inst. of Technology (KIT) (Germany). Physikalisches Inst.

The iron-based superconductors AFe₂As₂ with A = K, Rb, Cs exhibit large Sommerfeld coefficients approaching those of heavy-fermion systems. We have investigated the magnetostriction and thermal expansion of this series to shed light on this unusual behavior. Quantum oscillations of the magnetostriction allow identifying the band-specific quasiparticle masses which by far exceed the band-structure derived masses. The divergence of the Grüneisen ratio derived from thermal expansion indicates that with increasing volume along the series a quantum critical point is approached. In conclusion, the critical fluctuations responsible for the enhancement of the quasiparticle masses appear to weaken the superconducting state.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Science Foundation of China

Grant/Contract Number:: AC52-06NA25396; 11374361; C-1411; PHY-1066293

OSTI ID:: 1414118

Alternate ID(s):: OSTI ID: 1256164

Report Number(s):: LA-UR-15-28161; TRN: US1800644

Journal Information:: Physical Review Letters, Vol. 116, Issue 23; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 42 works

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Evidence of nematic order and nodal superconducting gap along [110] direction in RbFe2As2 Liu, Xi; Tao, Ran; Ren, Mingqiang Nature Communications, Vol. 10, Issue 1 https://doi.org/10.1038/s41467-019-08962-z	journal	March 2019
Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1−xPx)2 Pelliciari, Jonathan; Ishii, Kenji; Huang, Yaobo Communications Physics, Vol. 2, Issue 1 https://doi.org/10.1038/s42005-019-0236-3	journal	November 2019
Novel electronic nematicity in heavily hole-doped iron pnictide superconductors Ishida, Kousuke; Tsujii, Masaya; Hosoi, Suguru Proceedings of the National Academy of Sciences, Vol. 117, Issue 12 https://doi.org/10.1073/pnas.1909172117	journal	March 2020
Putative hybridization gap in ${CaMn}_{2} {Bi}_{2}$ under applied pressure Piva, M. M.; Thomas, S. M.; Fisk, Z. Physical Review B, Vol. 100, Issue 4 https://doi.org/10.1103/physrevb.100.045108	journal	July 2019
Broken mirror symmetry, incommensurate spin correlations, and $B_{2 g}$ nematic order in iron pnictides Wang, Yiming; Hu, Wenjun; Yu, Rong Physical Review B, Vol. 100, Issue 10 https://doi.org/10.1103/physrevb.100.100502	journal	September 2019
Strong correlations, strong coupling, and $s$ -wave superconductivity in hole-doped ${BaFe}_{2} {As}_{2}$ single crystals Hardy, F.; Böhmer, A. E.; de' Medici, L. Physical Review B, Vol. 94, Issue 20 https://doi.org/10.1103/physrevb.94.205113	journal	November 2016
Non-trivial role of interlayer cation states in iron-based superconductors Guterding, Daniel; Jeschke, Harald O.; Mazin, I. I. arXiv https://doi.org/10.48550/arxiv.1610.08626	text	January 2016
Evidence of nematic order and nodal superconducting gap along [110] direction in RbFe2As2 Liu, Xi; Tao, Ran; Ren, Mingqiang arXiv https://doi.org/10.48550/arxiv.1803.07304	text	January 2018

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Title: Strain-Driven Approach to Quantum Criticality in AFe₂As₂ with A=K, Rb, and Cs