Special Issue:
TOPICAL REVIEW — Celebrating 30 Years of Chinese Physics B
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Ultrafast Coulomb explosion imaging of molecules and molecular clusters |
Xiaokai Li(李孝开), Xitao Yu(余西涛), Pan Ma(马盼), Xinning Zhao(赵欣宁), Chuncheng Wang(王春成), Sizuo Luo(罗嗣佐)†, and Dajun Ding(丁大军)‡ |
Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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Abstract Taking an image of their structure and a movie of their dynamics of small quantum systems have always been a dream of physicists and chemists. Laser-induced Coulomb explosion imaging (CEI) provides a great opportunity to make this dream a reality for small molecules or their aggregation —— clusters. The method is unique for identifying the atomic locations with ångstrom spatial resolution and capturing the structural evolution with a femtosecond time scale, in particular for imaging transient state products. This review summarizes the determination of three-dimensional equilibrium geometry of molecules and molecular cluster system through the reconstruction from the fragments momenta, and also shows that the dissociation dynamics on the complex potential energy surface can be tracked in real-time with the ultrafast CEI (UCEI). Furthermore, the detailed measurement and analysis procedures of the CEI, theoretical methods, exemplary results, and future perspectives of the technique are described.
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Received: 01 July 2022
Revised: 15 August 2022
Accepted manuscript online:
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PACS:
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33.20.Xx
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(Spectra induced by strong-field or attosecond laser irradiation)
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36.40.Mr
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(Spectroscopy and geometrical structure of clusters)
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82.53.Eb
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(Pump probe studies of photodissociation)
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Fund: Project partially supported by the National Key Research and Development Program of China (Grant Nos. 2019YFA0307700), the National Natural Science Foundation of China (Grant Nos. 12004133, 12074143, 12134005, and 11904120), and China Postdoctoral Science Foundation (Grant No. 2021M691220). |
Corresponding Authors:
Sizuo Luo, Dajun Ding
E-mail: luosz@jlu.edu.cn;dajund@jlu.edu.cn
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Cite this article:
Xiaokai Li(李孝开), Xitao Yu(余西涛), Pan Ma(马盼), Xinning Zhao(赵欣宁), Chuncheng Wang(王春成), Sizuo Luo(罗嗣佐), and Dajun Ding(丁大军) Ultrafast Coulomb explosion imaging of molecules and molecular clusters 2022 Chin. Phys. B 31 103304
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[1] Peplow M 2017 Nature 544 408 [2] Neutze R, Wouts R, van der Spoel D, Weckert E and Hajdu J 2000 Nature 406 752 [3] Ihee H, Lorenc M, Kim T K, Kong Q Y, Cammarata M, Lee J H, Bratos S and Wulff M 2005 Science 309 1223 [4] Gaffney K J and Chapman H N 2007 Science 316 1444 [5] Gross L, Mohn F, Moll N, Liljeroth P and Meyer G 2009 Science 325 1110 [6] Suzuki S, Green P G, Bumgarner R E, Dasgupta S, Goddard W A and Blake G A 1992 Science 257 942 [7] Zhang B, Yu Y, Zhang Y Y, Jiang S, Li Q, Hu H S, Li G, Zhao Z, Wang C, Xie H, Zhang W, Dai D, Wu G, Zhang D H, Jiang L, Li J and Yang X 2020 Proc. Nat. Acad. Sci. 117 15423 [8] Li G, Zhang Y Y, Li Q, Wang C, Yu Y, Zhang B, Hu H S, Zhang W, Dai D, Wu G, Zhang D H, Li J, Yang X and Jiang L 2020 Nat. Commun. 11 5449 [9] Li J, Li X, Zhai H J and Wang L S 2003 Science 299 864 [10] Glownia J M, Natan A, Cryan J P, Hartsock R, Kozina M, Minitti M P, Nelson S, Robinson J, Sato T, van Driel T, Welch G, Weninger C, Zhu D and Bucksbaum P H 2016 Phys. Rev. Lett. 117 153003 [11] Yang J, Guehr M, Shen X, Li R, Vecchione T, Coffee R, Corbett J, Fry A, Hartmann N, Hast C, Hegazy K, Jobe K, Makasyuk I, Robinson J, Robinson M S, Vetter S, Weathersby S, Yoneda C, Wang X and Centurion M 2016 Phys. Rev. Lett. 117 153002 [12] Yang J, Zhu X, Wolf Thomas J A, Li Z, Nunes J P F, Coffee R, Cryan James P, Gühr M, Hegazy K, Heinz Tony F, Jobe K, Li R, Shen X, Veccione T, Weathersby S, Wilkin Kyle J, Yoneda C, Zheng Q, Martinez Todd J, Centurion M and Wang X 2018 Science 361 64 [13] Yang J, Zhu X, Pedro F N J, Yu Jimmy K, Parrish Robert M, Wolf Thomas J A, Centurion M, Gühr M, Li R, Liu Y, Moore B, Niebuhr M, Park S, Shen X, Weathersby S, Weinacht T, Martinez Todd J and Wang X 2020 Science 368 885 [14] Vager Z, Naaman R and Kanter E P 1989 Science 244 426 [15] Pitzer M, Kunitski M, Johnson A S, Jahnke T, Sann H, Sturm F, Schmidt L P H, Schmidt-Böcking H, Dörner R, Stohner J, Kiedrowski J, Reggelin M, Marquardt S, Schießer A, Berger R and Schöffler M S 2013 Science 341 1096 [16] Herwig P, Zawatzky K, Grieser M, Heber O, Jordon-Thaden B, Krantz C, Novotny O, Repnow R, Schurig V, Schwalm D, Vager Z, Wolf A, Trapp O and Kreckel H 2013 Science 342 1084 [17] Stapelfeldt H, Constant E and Corkum P B 1995 Phys. Rev. Lett. 74 3780 [18] Bocharova I A, Alnaser A S, Thumm U, Niederhausen T, Ray D, Cocke C L and Litvinyuk I V 2011 Phys. Rev. A 83 013417 [19] Jiang Y H, Rudenko A, Herrwerth O, Foucar L, Kurka M, Kühnel K U, Lezius M, Kling M F, van Tilborg J, Belkacem A, Ueda K, Düsterer S, Treusch R, Schröter C D, Moshammer R and Ullrich J 2010 Phys. Rev. Lett. 105 263002 [20] Lin K, Hu X, Pan S, Chen F, Ji Q, Zhang W, Li H, Qiang J, Sun F, Gong X, Li H, Lu P, Wang J, Wu Y and Wu J 2020 J. Phys. Chem. Lett. 11 3129 [21] Zhao X, Yu X, Xu X, Yin Z, Yu J, Li X, Ma P, Zhang D, Wang C, Luo S and Ding D 2020 Phys. Rev. A 101 013416 [22] Zhao X, Xu T, Yu X, Ren D, Zhang X, Li X, Ma P, Wang C, Zhang D, Wang Q, Hu X, Luo S, Wu Y, Wang J and Ding D 2021 Phys. Rev. A 103 053103 [23] Li M, Zhang M, Vendrell O, Guo Z, Zhu Q, Gao X, Cao L, Guo K, Su Q Q, Cao W, Luo S, Yan J, Zhou Y, Liu Y, Li Z and Lu P 2021 Nat. Commun. 12 4233 [24] Dahl P F, Costello D G and Walters W L 1960 Nucl. Phys. 21 106 [25] Breskin A, Faibis A, Goldring G, Hass M, Kaim R, Vager Z and Zwang N 1979 Phys. Rev. Lett. 42 369 [26] Gemmell D S 1980 Chem. Rev. 80 301 [27] Yatsuhashi T and Nakashima N 2018 J. Photochem. Photobiol., C 34 52 [28] Vager Z, Kanter E P, Both G, Cooney P J, Faibis A, Koenig W, Zabransky B J and Zajfman D 1986 Phys. Rev. Lett. 57 2793 [29] Plesser I, Vager Z and Naaman R 1986 Phys. Rev. Lett. 56 1559 [30] Zhu Z S, Miao J W, Liao X H, Miao L, Yuan X D and Shi M G 2009 Chin. Phys. B 18 4840 [31] Frasinski L J, Codling K, Hatherly P, Barr J, Ross I N and Toner W T 1987 Phys. Rev. Lett. 58 2424 [32] Cornaggia C, Lavancier J, Normand D, Morellec J, Agostini P, Chambaret J P and Antonetti A 1991 Phys. Rev. A 44 4499 [33] Strickland D T, Beaudoin Y, Dietrich P and Corkum P B 1992 Phys. Rev. Lett. 68 2755 [34] Codling K and Frasinski L J 1993 J. Phys. B 26 783 [35] Codling K and Frasinski L J 1994 Contemp. Phys. 35 243 [36] Posthumus J H 2004 Rep. Prog. Phys. 67 623 [37] Stapelfeldt H, Constant E, Sakai H and Corkum P B 1998 Phys. Rev. A 58 426 [38] Frasinski L J, Codling K and Hatherly P A 1989 Science 246 1029 [39] Schouder C A, Chatterley A S, Pickering J D and Stapelfeldt H 2022 Annu. Rev. Phys. Chem. 73 323 [40] Eppink A T J B and Parker D H 1997 Rev. Sci. Instrum. 68 3477 [41] Dörner R, Mergel V, Jagutzki O, Spielberger L, Ullrich J, Moshammer R and Schmidt-Böcking H 2000 Phys. Rep. 330 95 [42] Ullrich J, Moshammer R, Dorn A, Dörner R, Schmidt L P H and Schmidt-Böcking H 2003 Rep. Prog. Phys. 66 1463 [43] Hasegawa H, Hishikawa A and Yamanouchi K 2001 Chem. Phys. Lett. 349 57 [44] Hishikawa A, Hasegawa H and Yamanouchi K 2002 Chem. Phys. Lett. 361 245 [45] Légaré F, Lee K F, Litvinyuk I V, Dooley P W, Wesolowski S S, Bunker P R, Dombi P, Krausz F, Bandrauk A D, Villeneuve D M and Corkum P B 2005 Phys. Rev. A 71 013415 [46] Pitzer M 2017 J. Phys. B 50 153001 [47] Boll R, Schäfer J M, Richard B, Fehre K, Kastirke G, Jurek Z, Schöffler M S, Abdullah M M, Anders N, Baumann T M, Eckart S, Erk B, De Fanis A, Dörner R, Grundmann S, Grychtol P, Hartung A, Hofmann M, Ilchen M, Inhester L, Janke C, Jin R, Kircher M, Kubicek K, Kunitski M, Li X, Mazza T, Meister S, Melzer N, Montano J, Music V, Nalin G, Ovcharenko Y, Passow C, Pier A, Rennhack N, Rist J, Rivas D E, Rolles D, Schlichting I, Schmidt L P H, Schmidt P, Siebert J, Strenger N, Trabert D, Trinter F, Vela-Perez I, Wagner R, Walter P, Weller M, Ziolkowski P, Son S K, Rudenko A, Meyer M, Santra R and Jahnke T 2022 Nat. Phys. 18 423 [48] Ma L, Yong H, Geiser J D, Moreno Carrascosa A, Goff N and Weber P M 2020 Struct. Dynam. 7 034102 [49] Luo S, Zhu R, He L, Hu W, Li X, Ma P, Wang C, Liu F, Roeterdink W G, Stolte S and Ding D 2015 Phys. Rev. A 91 053408 [50] Ablikim U, Bomme C, Xiong H, Savelyev E, Obaid R, Kaderiya B, Augustin S, Schnorr K, Dumitriu I, Osipov T, Bilodeau R, Kilcoyne D, Kumarappan V, Rudenko A, Berrah N and Rolles D 2016 Sci. Rep. 6 38202 [51] Burt M, Amini K, Lee J W L, Christiansen L, Johansen R R, Kobayashi Y, Pickering J D, Vallance C, Brouard M and Stapelfeldt H 2018 J. Chem. Phys. 148 091102 [52] Endo T, Neville Simon P, Wanie V, Beaulieu S, Qu C, Deschamps J, Lassonde P, Schmidt Bruno E, Fujise H, Fushitani M, Hishikawa A, Houston Paul L, Bowman Joel M, Schuurman Michael S, Légaré F and Ibrahim H 2020 Science 370 1072 [53] Khan A, Jahnke T, Zeller S, Trinter F, Schöffler M, Schmidt L P H, Dörner R and Kunitski M 2020 J. Phys. Chem. Lett. 11 2457 [54] Zhu X, Hu X, Yan S, Peng Y, Feng W, Guo D, Gao Y, Zhang S, Cassimi A, Xu J, Zhao D, Dong D, Hai B, Wu Y, Wang J and Ma X 2020 Nat. Commun. 11 2987 [55] Pickering J D, Shepperson B, Christiansen L and Stapelfeldt H 2018 J. Chem. Phys. 149 154306 [56] Pickering J D, Shepperson B, Hübschmann B A K, Thorning F and Stapelfeldt H 2018 Phys. Rev. Lett. 120 113202 [57] Niikura H, Légaré F, Hasbani R, Ivanov M Y, Villeneuve D M and Corkum P B 2003 Nature 421 826 [58] Wang E, Shan X, Shen Z, Li X, Gong M, Tang Y and Chen X 2015 Phys. Rev. A 92 062713 [59] Wang Y, Shi X, Zhou J, Xu S, Guo D, Yan S, Zhu X and Ma X 2020 Phys. Rev. A 101 042706 [60] Wang B, Han J, Zhu X, Wei L, Ren B, Zhang Y, Yu W, Yan S, Ma X, Zou Y, Chen L and Wei B 2021 Phys. Rev. A 103 042810 [61] Zhao X, Shan X, Zhu X, Chen L, Shen Z, Feng W, Guo D, Zhao D, Zhang R, Gao Y, Huang Z, Zhang S, Ma X and Chen X 2021 Chin. Phys. B 30 113302 [62] Zhang M, Najjari B, Hai B, Zhao D M, Lei J T, Dong D P, Zhang S F and Ma X W 2020 Chin. Phys. B 29 063302 [63] Wu C, Wu C, Song D, Su H, Yang Y, Wu Z, Liu X, Liu H, Li M, Deng Y, Liu Y, Peng L Y, Jiang H and Gong Q 2013 Phys. Rev. Lett. 110 103601 [64] Ma J, Lin K, Ji Q, Zhang W, Li H, Sun F, Qiang J, Lu P, Li H, Gong X and Wu J 2019 Chin. Phys. B 28 093301 [65] Liu H, Li M, Xie X G, Wu C, Deng Y K, Wu C Y, Gong Q H and Liu Y Q 2015 Chin. Phys. Lett. 32 063301 [66] Ma P, Wang C, Li X, Yu X, Tian X, Hu W, Yu J, Luo S and Ding D 2017 J. Chem. Phys. 146 244305 [67] Ma P, Wang C, Luo S, Yu X, Li X, Wang Z, Hu W, Yu J, Yang Y, Tian X, Cui Z and Ding D 2018 J. Phys. B 51 094002 [68] Ma P, Wang C, Luo S, Li X, Hu W, Yu J, Yu X, Tian X, Qu Z and Ding D 2019 Phys. Rev. A 99 023423 [69] Zhang D, Luo S, Xu H, Jin M, Liu F, Yan B, Wang Z, Liu H, Jiang D, Eppink A, Roeterdink W, Stolte S and Ding D 2017 Eur. Phys. J. D 71 148 [70] Luo S, Hu W, Yu J, Li X, He L, Wang C, Liu F and Ding D 2017 J. Phys. Chem. A 121 6547 [71] Luo S, Zhou S, Hu W, Yu J, Li X, Ma P, He L, Wang C, Guo F, Yang Y and Ding D 2018 J. Phys. Chem. A 122 8427 [72] Wang X, Zhang J, Zhang S A and Sun Z R 2016 Chin. Phys. B 25 53301 [73] Li H Y, Huang M D, Kang M and Li D J 2018 Chin. Phys. B 27 63602 [74] Li X, Ren H Z, Ma R, Chen J X, Yang H and Gong Q H 2005 Chin. Phys. B 13 1564 [75] Hu X, Peng Y, Zhu X, Yan S, Liu L, Feng W, Guo D, Gao Y, Zhang S, Zhao D, Dong D, Hai B, Xu J, Zhang S, Ma X, Wang J and Wu Y 2020 Phys. Rev. A 101 012707 [76] Luzon I, Livshits E, Gope K, Baer R and Strasser D 2019 J. Phys. Chem. Lett. 10 1361 [77] Zhou W, Ge L, Cooper G A, Crane S W, Evans M H, Ashfold M N R and Vallance C 2020 J. Chem. Phys. 153 184201 [78] Hishikawa A, Iwamae A and Yamanouchi K 1999 Phys. Rev. Lett. 83 1127 [79] Sato Y, Kono H, Koseki S and Fujimura Y 2003 J. Am. Chem. Soc. 125 8019 [80] Hansen J L, Nielsen J H, Madsen C B, Lindhardt A T, Johansson M P, Skrydstrup T, Madsen L B and Stapelfeldt H 2012 J. Chem. Phys. 136 204310 [81] Rajput J, Severt T, Berry B, Jochim B, Feizollah P, Kaderiya B, Zohrabi M, Ablikim U, Ziaee F, Raju P K, Rolles D, Rudenko A, Carnes K D, Esry B D and Ben-Itzhak I 2018 Phys. Rev. Lett. 120 103001 [82] Alnaser A S, Tong X M, Osipov T, Voss S, Maharjan C M, Ranitovic P, Ulrich B, Shan B, Chang Z, Lin C D and Cocke C L 2004 Phys. Rev. Lett. 93 183202 [83] Hanus V, Kangaparambil S, Larimian S, Dorner-Kirchner M, Xie X, Schöffler M S, Paulus G G, Baltuška A, Staudte A and Kitzler-Zeiler M 2020 Phys. Rev. Lett. 124 103201 [84] Hering P and Cornaggia C 1999 Phys. Rev. A 59 2836 [85] Bryan W A, Sanderson J H, El-Zein A, Newell W R, Taday P F and Langley A J 2000 J. Phys. B 33 745 [86] Shi H T and Miao X Y 2013 Chin. Phys. Lett. 30 063101 [87] Corrales M E, González-Vázquez J, de Nalda R and Bañares L 2019 J. Phys. Chem. Lett. 10 138 [88] Xu H, Okino T and Yamanouchi K 2009 J. Chem. Phys. 131 151102 [89] Xu H, Marceau C, Nakai K, Okino T, Chin S L and Yamanouchi K 2010 J. Chem. Phys. 133 071103 [90] Ekanayake N, Severt T, Nairat M, Weingartz N P, Farris B M, Kaderiya B, Feizollah P, Jochim B, Ziaee F, Borne K, Raju P K, Carnes K D, Rolles D, Rudenko A, Levine B G, Jackson J E, Ben-Itzhak I and Dantus M 2018 Nat. Commun. 9 5186 [91] Sanderson J H, El-Zein A, Bryan W A, Newell W R, Langley A J and Taday P F 1999 Phys. Rev. A 59 R2567 [92] Hishikawa A, Iwamae A, Hoshina K, Kono M and Yamanouchi K 1998 Chem. Phys. Lett. 282 283 [93] Bocharova I, Karimi R, Penka E F, Brichta J P, Lassonde P, Fu X, Kieffer J C, Bandrauk A D, Litvinyuk I, Sanderson J and Légaré F 2011 Phys. Rev. Lett. 107 063201 [94] Chen J X, Ma R, Ren H Z, Li X, Yang H and Gong Q H 2003 Chin. Phys. Lett. 20 1040 [95] Christensen L, Nielsen J H, Slater C S, Lauer A, Brouard M and Stapelfeldt H 2015 Phys. Rev. A 92 033411 [96] Fehre K, Eckart S, Kunitski M, Pitzer M, Zeller S, Janke C, Trabert D, Rist J, Weller M, Hartung A, Schmidt L P H, Jahnke T, Berger R, Dörner R and Schöffler M S 2019 Sci. Adv. 5 eaau7923 [97] Pathak S, Obaid R, Bhattacharyya S, Bürger J, Li X, Tross J, Severt T, Davis B, Bilodeau R C, Trallero-Herrero C A, Rudenko A, Berrah N and Rolles D 2020 J. Phys. Chem. Lett. 11 10205 [98] Ulrich B, Vredenborg A, Malakzadeh A, Schmidt L P H, Havermeier T, Meckel M, Cole K, Smolarski M, Chang Z, Jahnke T and Dörner R 2011 J. Phys. Chem. A 115 6936 [99] Wu J, Kunitski M, Schmidt L P H, Jahnke T and Dörner R 2012 J. Chem. Phys. 137 104308 [100] Wu C, Wu C, Song D, Su H, Xie X, Li M, Deng Y, Liu Y and Gong Q 2014 J. Chem. Phys. 140 141101 [101] Yu X, Zhao X, Wang Z, Yang Y, Zhang X, Ma P, Li X, Wang C, Xu X, Wang C, Zhang D, Luo S and Ding D 2021 Phys. Rev. A 104 053104 [102] Song P, Wang X, Meng C, Dong W, Li Y, Lv Z, Zhang D, Zhao Z and Yuan J 2019 Phys. Rev. A 99 053427 [103] Yu X, Liu Y, Deng K, Zhang X, Ma P, Li X, Wang C, Cui Z, Luo S and Ding D 2022 Phys. Rev. A 105 063105 [104] Schouder C A, Chatterley A S, Madsen L B, Jensen F and Stapelfeldt H 2020 Phys. Rev. A 102 063125 [105] Slater C S, Blake S, Brouard M, Lauer A, Vallance C, Bohun C S, Christensen L, Nielsen J H, Johansson M P and Stapelfeldt H 2015 Phys. Rev. A 91 053424 [106] Vallance C, Heathcote D and Lee J W L 2021 J. Phys. Chem. A 125 1117 [107] Christensen L, Christiansen L, Shepperson B and Stapelfeldt H 2016 Phys. Rev. A 94 023410 [108] Saribal C, Owens A, Yachmenev A and Küpper J 2021 J. Chem. Phys. 154 071101 [109] Luo S, Hu W, Yu J, Zhu R, He L, Li X, Ma P, Wang C, Liu F, Roeterdink W G, Stolte S and Ding D 2017 J. Phys. Chem. A 121 777 [110] Zhou J, He C, Liu M M, Wang E, Jia S, Dorn A, Ren X and Liu Y 2021 Phys. Rev. Res. 3 023050 [111] Wang E, Ren X and Dorn A 2021 Phys. Rev. Lett. 126 103402 [112] Burley J D, Ervin K M and Armentrout P B 1987 J. Chem. Phys. 86 1944 [113] Smith D R, Huppi E R and Wise J O 2000 J. Atmos. Sol.-Terr. Phys. 62 1189 [114] Eckle P, Smolarski M, Schlup P, Biegert J, Staudte A, Schöffler M, Muller H G, Dörner R and Keller U 2008 Nat. Phys. 4 565 [115] Pfeiffer A N, Cirelli C, Smolarski M, Dörner R and Keller U 2011 Nat. Phys. 7 428 [116] Luo S, Liu J, Li X, Zhang D, Yu X, Ren D, Li M, Yang Y, Wang Z, Ma P, Wang C, Zhao J, Zhao Z and Ding D 2021 Phys. Rev. Lett. 126 103202 [117] Belyaev A K, Domcke W, Lasser C and Trigila G 2015 J. Chem. Phys. 142 104307 [118] Kling N G, Díaz-Tendero S, Obaid R, Disla M R, Xiong H, Sundberg M, Khosravi S D, Davino M, Drach P, Carroll A M, Osipov T, Martín F and Berrah N 2019 Nat. Commun. 10 2813 [119] Yu X, Zhang X, Hu X, Zhao X, Ren D, Li X, Ma P, Wang C, Wu Y, Luo S and Ding D 2022 Phys. Rev. Lett. 129 023001 [120] Wang E, Ren X, Baek W, Rabus H, Pfeifer T and Dorn A 2020 Nat. Commun. 11 2194 [121] Ren X, Zhou J, Wang E, Yang T, Xu Z, Sisourat N, Pfeifer T and Dorn A 2022 Nat. Chem. 14 232 [122] Picón A, Lehmann C S, Bostedt C, Rudenko A, Marinelli A, Osipov T, Rolles D, Berrah N, Bomme C, Bucher M, Doumy G, Erk B, Ferguson K R, Gorkhover T, Ho P J, Kanter E P, Krässig B, Krzywinski J, Lutman A A, March A M, Moonshiram D, Ray D, Young L, Pratt S T and Southworth S H 2016 Nat. Commun. 7 11652 |
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