[1] Lee P A, Nagaosa N, Wen X G 2006 Rev. Mod. Phys. 78 17
[2] Stewart G 2006 Rev. Mod. Phys. 78 743
[3] Kamihara Y, Watanabe T, Hirano M, et al. 2008 J. Am. Chem. Soc. 130 3296
[4] Dong J, Zhang H, Xu G, et al. 2008 Europhys. Lett. 83 27006
[5] Nomura T, Kim S W, Kamihara Y, et al. 2008 Superconductor Sci. Technol. 21 125028
[6] de La Cruz C, Huang Q, Lynn J W, et al. 2008 Nature 453 899
[7] Huang Q, Qiu Y, Bao W, et al. 2008 Phys. Rev. Lett. 101 257003
[8] Li S, de La Cruz C, Huang Q, et al. 2009 Phys. Rev. B 80 020504
[9] Dai P 2015 Rev. Mod. Phys. 87 855
[10] Lumsden M D, Christianson A D 2010 J. Phys.: Condensed Matter 22 203203
[11] Shibauchi T, Carrington A, Matsuda Y 2014 Annu. Rev. Condens. Matter Phys. 5 1
[12] Rotter M, Tegel M, Johrendt D 2008 Phys. Rev. Lett. 101 107006
[13] Pramanik A, Abdel-Hafiez M, Aswartham S, et al. 2011 Phys. Rev. B 84 064525
[14] Sefat A S, Jin R, McGuire M A, et al. 2008 Phys. Rev. Lett. 101 117004
[15] Li L, Luo Y, Wang Q, et al. 2009 New J. Phys. 11 025008
[16] Jiang S, Xing H, Xuan G, et al. 2009 J. Phys.: Condensed Matter 21 382203
[17] Scalapino D J 2012 Rev. Mod. Phys. 84 1383
[18] Canfield P C, Bud'Ko S L 2010 Annu. Rev. Condens. Matter Phys. 1 27
[19] Luo H, Wang Z, Yang H, et al. 2008 Superconductor Sci. Technol. 21 125014
[20] Chen Y, Lu X, Wang M, et al. 2011 Superconductor Sci. Technol. 24 065004
[21] Lynn J W, Dai P 2009 Physica C 469 469
[22] Pitcher M J, Parker D R, Adamson P, et al. 2008 Chem. Commun. 5918
[23] Parker D R, Pitcher M J, Baker P J, et al. 2009 Chem. Commun. 2189
[24] Tapp J H, Tang Z, Lv B, et al. 2008 Phys. Rev. B 78 060505
[25] Wang X, Liu Q, Lv Y, et al. 2008 Solid State Commun. 148 538
[26] Rotter M, Tegel M, Johrendt D, et al. 2008 Phys. Rev. B 78 020503
[27] Bhmer A, Hardy F, Wang L, et al. 2015 Nat. Commun. 6 7911
[28] Kreyssig A, Wilde J M, Bhmer A E, et al. 2018 Phys. Rev. B 97 224521
[29] Allred J, Taddei K, Bugaris D, et al. 2016 Nat. Phys. 12 493
[30] Hoyer M, Fernandes R M, Levchenko A, et al. 2016 Phys. Rev. B 93 144414
[31] Hsu F C, Luo J Y, Yeh K W, et al. 2008 Proc. Natl. Acad. Sci. USA 105 14262
[32] Li S, de La Cruz C, Huang Q, et al. 2009 Phys. Rev. B 79 054503
[33] Bao W, Qiu Y, Huang Q, et al. 2009 Phys. Rev. Lett. 102 247001
[34] Rodriguez E E, Zavalij P, Hsieh P Y, et al. 2010 J. Am. Chem. Soc. 132 10006
[35] Rodriguez E E, Stock C, Zajdel P, et al. 2011 Phys. Rev. B 84 064403
[36] Rodriguez E E, Sokolov D, Stock C, et al. 2013 Phys. Rev. B 88 165110
[37] Fang M H, Wang H D, Dong C H, et al. 2011 Europhys. Lett. 94 27009
[38] Wei B, Huang Q Z, Chen G F, et al. 2011 Chin. Phys. Lett. 28 086104
[39] Ye F, Chi S, Bao W, et al. 2011 Phys. Rev. Lett. 107 137003
[40] Zhao J, Cao H, Bourret-Courchesne E, et al. 2012 Phys. Rev. Lett. 109 267003
[41] Wang M, Tian W, Valdivia P, et al. 2014 Phys. Rev. B 90 125148
[42] Takahashi H, Sugimoto A, Nambu Y, et al. 2015 Nat. Mater. 14 1008
[43] Yamauchi T, Hirata Y, Ueda Y, et al. 2015 Phys. Rev. Lett. 115 246402
[44] Wang M, Jin S, Yi M, et al. 2017 Phys. Rev. B 95 060502
[45] Hong H, Steinfink H 1972 J. Solid State Chem. 5 93
[46] Nambu Y, Ohgushi K, Suzuki S, et al. 2012 Phys. Rev. B 85 064413
[47] Lu X, Gretarsson H, Zhang R, et al. 2013 Phys. Rev. Lett. 110 257001
[48] Luo H, Zhang R, Laver M, et al. 2012 Phys. Rev. Lett. 108 247002
[49] Pratt D, Kim M, Kreyssig A, et al. 2011 Phys. Rev. Lett. 106 257001
[50] Lu X, Tam D W, Zhang C, et al. 2014 Phys. Rev. B 90
[51] Si Q, Abrahams E 2008 Phys. Rev. Lett. 101 076401
[52] Inosov D, Park J, Bourges P, et al. 2010 Nat. Phys. 6 178
[53] Dai P, Hu J, Dagotto E 2012 Nat. Phys. 8 709
[54] Harriger L W, Luo H, Liu M, et al. 2011 Phys. Rev. B 84 054544
[55] McQueeney R, Diallo S, Antropov V, et al. 2008 Phys. Rev. Lett. 101 227205
[56] Zhao J, Yao D X, Li S, et al. 2008 Phys. Rev. Lett. 101 167203
[57] Diallo S, Antropov V, Perring T, et al. 2009 Phys. Rev. Lett. 102 187206
[58] Matan K, Morinaga R, Iida K, Sato T 2009 Phys. Rev. B 79 054526
[59] Ewings R, Perring T, Gillett J, et al. 2011 Phys. Rev. B 83 214519
[60] Coldea R, Hayden S M, Aeppli G, et al. 2001 Phys. Rev. Lett. 86 5377
[61] Zhao J, Adroja D, Yao D X, et al. 2009 Nat. Phys. 5 555
[62] Zhang C, Harriger L W, Yin Z, et al. 2014 Phys. Rev. Lett. 112 217202
[63] Lipscombe O, Chen G, Fang C, et al. 2011 Phys. Rev. Lett. 106 057004
[64] Wang M, Valdivia P, Yi M, et al. 2015 Phys. Rev. B 92 041109
[65] Wang M, Yi M, Jin S, et al. 2016 Phys. Rev. B 94 041111
[66] Fujita M, Hiraka H, Matsuda M, et al. 2011 J. Phys. Soc. Jpn. 81 011007
[67] Tranquada J M, Xu G, Zaliznyak I A 2014 J. Magn. Magn. Mater. 350 148
[68] Stock C, Cowley R A, Buyers W J L, et al. 2010 Phys. Rev. B 82 174505
[69] Wang M, Zhang C, Lu X, et al. 2013 Nat. Commun. 4 2874
[70] Liu M, Harriger L W, Luo H, et al. 2012 Nat. Phys. 8 376
[71] Luo H, Lu X, Zhang R, et al. 2013 Phys. Rev. B 88 144516
[72] Chen X, Dai P, Feng D, et al. 2014 Natl. Sci. Rev. 1 371
[73] Horigane K, Kihou K, Fujita K, et al. 2016 Sci. Rep. 6 33303
[74] Park J, Inosov D, Yaresko A, et al. 2010 Phys. Rev. B 82 134503
[75] Luo H, Yamani Z, Chen Y, et al. 2012 Phys. Rev. B 86 024508
[76] Zhang C, Wang M, Luo H, et al. 2011 Sci. Rep. 1 115
[77] Lee C, Kihou K, Kawano-Furukawa H, et al. 2011 Phys. Rev. Lett. 106 067003
[78] Park H, Haule K, Kotliar G 2011 Phys. Rev. Lett. 107 137007
[79] Spalek J 2007 Acta Phys. Polon. A 111 409
[80] Tranquada J M 2007 Handbook of High-Temperature Superconductivity (Springer) p257
[81] Stockert O, Arndt J, Faulhaber E, et al. 2011 Nat. Phys. 7 119
[82] Eschrig M 2006 Adv. Phys. 55 47
[83] Dai P, Mook H A, Hunt R D, et al. 2001 Phys. Rev. B 63 054525
[84] Wilson S D, Dai P, Li S, et al. 2006 Nature 442 59
[85] Yu G, Li Y, Motoyama E, et al. 2009 Nat. Phys. 5 873
[86] Christianson A, Goremychkin E, Osborn R, et al. 2008 Nature 456 930
[87] Mazin I I 2010 Nature 464 183
[88] Hirschfeld P, Korshunov M, Mazin I 2011 Rep. Prog. Phys. 74 124508
[89] Lumsden M D, Christianson A D, Parshall D, et al. 2009 Phys. Rev. Lett. 102 107005
[90] Chi S, Schneidewind A, Zhao J, et al. 2009 Phys. Rev. Lett. 102 107006
[91] Li S, Chen Y, Chang S, et al. 2009 Phys. Rev. Rev. B 79 174527
[92] Xie T, Wei Y, Gong D, et al. 2018 Phys. Rev. Lett. 120 267003
[93] Johnson P D, Xu G, Yin W 2015 Iron-based Superconductivity (Berlin, Heidelberg: Springer)
[94] Wang Z, Wang Z, Luo H, et al. 2012 Phys. Rev. B 86 060508
[95] Wang M, Wang M, Miao H, et al. 2012 Phys. Rev. B 86 144511
[96] Qureshi N, Steffens P, Drees Y, et al. 2012 Phys. Rev. Lett. 108 117001
[97] Argyriou D, Hiess A, Akbari A, et al. 2010 Phys. Rev. B 81 220503
[98] Li S, Zhang C, Wang M, et al. 2010 Phys. Rev. Lett. 105 157002
[99] Lee S H, Xu G, Ku W, et al. 2010 Phys. Rev. B 81 220502
[100] Xu Z, Wen J, Xu G, et al. 2010 Phys. Rev. B 82 104525
[101] Ding H, Richard P, Nakayama K, et al. 2008 Europhys. Lett. 83 47001
[102] Terashima K, Sekiba Y, Bowen J, et al. 2009 Proc. Natl. Acad. Sci. USA 106 7330
[103] Stock C, Broholm C, Zhao Y, et al. 2012 Phys. Rev. Lett. 109 167207
[104] Vilmercati P, Fedorov A, Vobornik I, et al. 2009 Phys. Rev. B 79 220503
[105] Xu Y, Huang Y, Cui X, et al. 2011 Nat. Phys. 7 198
[106] Zhang R, Wang W, Maier T A, et al. 2018 Phys. Rev. B 98 060502
[107] Squires G L 2012 Introduction to the Theory of Thermal Neutron Scattering (Cambridge: Cambridge University Press)
[108] Shirane G, Shapiro S M, Tranquada J M 2002 Neutron Scattering with a Triple-axis Spectrometer: Basic Techniques (Cambridge: Cambridge University Press)
[109] Babkevich P, Roessli B, Gvasaliya S, et al. 2011 Phys. Rev. B 83 180506
[110] Lipscombe O, Harriger L W, Freeman P, et al. 2010 Phys. Rev. B 82 064515
[111] Liu M, Lester C, Kulda J, et al. 2012 Phys. Rev. B 85 214516
[112] Zhang C, Liu M, Su Y, et al. 2013 Phys. Rev. B 87 081101
[113] Luo H, Wang M, Zhang C, et al. 2013 Phys. Rev. Lett. 111 107006
[114] Song Y, Regnault L P, Zhang C, et al. 2013 Phys. Rev. B 88 134512
[115] Xie T, Gong D, Ghosh H, et al. 2018 Phys. Rev. Lett. 120 137001
[116] Hu D, Zhang W, Wei Y, et al. 2017 Phys. Rev. B 96 180503
[117] Wang C, Zhang R, Wang F, et al. 2013 Phys. Rev. X 3 041036
[118] Chu J, Analytis J G, De Greve K, et al. 2010 Science 329 824
[119] Chen C, Maciejko J, Sorini A, et al. 2010 Phys. Rev. B 82 100504
[120] Fisher I R, Degiorgi L, Shen Z 2011 Rep. Prog. Phys. 74 124506
[121] Lorenzo J, Boullier C, Regnault L, et al. 2007 Phys. Rev. B 75 054418
[122] Chu J, Analytis J G, Press D, et al. 2010 Phys. Rev. B 81 214502
[123] Tanatar M, Blomberg E, Kreyssig A, et al. 2010 Phys. Rev. B 81 184508
[124] Dusza A, Lucarelli A, Pfuner F, et al. 2011 Europhys. Lett. 93 37002
[125] Nakajima M, Liang T, Ishida S, et al. 2011 Proc. Natl. Acad. Sci. USA 108 12238
[126] Chu J, Kuo H H, Analytis J G, et al. 2012 Science 337 710
[127] Jiang S, Jeevan H, Dong J, et al. 2013 Phys. Rev. Lett. 110 067001
[128] Yi M, Lu D, Chu J, et al. 2011 Proc. Natl. Acad. Sci. USA 108 6878
[129] Zhang Y, He C, Ye Z, et al. 2012 Phys. Rev. B 85 085121
[130] Fu M, Torchetti D A, Imai T, et al. 2012 Phys. Rev. Lett. 109 247001
[131] Lu X, Park J, Zhang R, et al. 2014 Science 345 657
[132] Chuang T M, Allan M, Lee J, et al. 2010 Science 327 181
[133] Rosenthal E P, Andrade E F, Arguello C J, et al. 2014 Nat. Phys. 10 225
[134] Gallais Y, Fernandes R, Paul I, et al. 2013 Phys. Rev. Lett. 111 267001
[135] Fernandes R M, VanBebber L H, Bhattacharya S, et al. 2010 Phys. Rev. Lett. 105 157003
[136] Yoshizawa M, Kimura D, Chiba T, et al. 2012 J. Phys. Soc. Jpn. 81 024604
[137] Bhmer A, Burger P, Hardy F, et al. 2014 Phys. Rev. Lett. 112 047001
[138] Bhmer A E, Meingast C 2016 C. R. Phys. 17 90
[139] Fernandes R M, Chubukov A, Schmalian J 2014 Nat. Phys. 10 97
[140] Fernandes R M, Schmalian J 2012 Superconductor Sci. Technol. 25 084005
[141] Zhang W, Park J, Lu X, et al. 2016 Phys. Rev. Lett. 117 227003