Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor

doi:10.1088/1674-1056/ab90ec

中国物理B ›› 2020, Vol. 29 ›› Issue (7): 77401-077401.doi: 10.1088/1674-1056/ab90ec

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor

C Cai(蔡淙), T T Han(韩婷婷), Z G Wang(王政国), L Chen(陈磊), Y D Wang(王宇迪), Z M Xin(信子鸣), M W Ma(马明伟), Yuan Li(李源), Y Zhang(张焱)

1 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China;
2 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China

收稿日期:2020-03-19 修回日期:2020-04-28 出版日期:2020-07-05 发布日期:2020-07-05
通讯作者: Y Zhang E-mail:yzhang85@pku.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11888101, 91421107, and 11574004) and the National Key Research and Development Program of China (Grant Nos. 2016YFA0301003 and 2018YFA0305602).

Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor

C Cai(蔡淙)¹, T T Han(韩婷婷)¹, Z G Wang(王政国)¹, L Chen(陈磊)¹, Y D Wang(王宇迪)¹, Z M Xin(信子鸣)¹, M W Ma(马明伟)¹, Yuan Li(李源)^1,2, Y Zhang(张焱)^1,2

1 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China;
2 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China

Received:2020-03-19 Revised:2020-04-28 Online:2020-07-05 Published:2020-07-05
Contact: Y Zhang E-mail:yzhang85@pku.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11888101, 91421107, and 11574004) and the National Key Research and Development Program of China (Grant Nos. 2016YFA0301003 and 2018YFA0305602).

摘要/Abstract

摘要： Nematic phase intertwines closely with high-T_c superconductivity in iron-based superconductors. Its mechanism, which is closely related to the pairing mechanism of superconductivity, still remains controversial. Comprehensive characterization of the electronic state reconstruction in the nematic phase is thus crucial. However, most experiments focus only on the reconstruction of band dispersions. Another important characteristic of electronic state, the spectral weight, has not been studied in details so far. Here, we studied the spectral weight transfer in the nematic phase of FeSe_0.9S_0.1 using angle-resolved photoemission spectroscopy and in-situ detwinning technique. There are two elliptical electron pockets overlapping with each other orthogonally at the Brillouin zone corner. We found that, upon cooling, one electron pocket loses spectral weight and fades away, while the other electron pocket gains spectral weight and becomes pronounced. Our results show that the symmetry breaking of the electronic state is manifested by not only the anisotropic band dispersion but also the band-selective modulation of the spectral weight. Our observation completes our understanding of the nematic electronic state, and put strong constraints on the theoretical models. It further provides crucial clues to understand the gap anisotropy and orbital-selective pairing in iron-selenide superconductors.

关键词: nematic order, superconductivity, iron-based superconductors, angle-resolved photoemission spectroscopy

Abstract: Nematic phase intertwines closely with high-T_c superconductivity in iron-based superconductors. Its mechanism, which is closely related to the pairing mechanism of superconductivity, still remains controversial. Comprehensive characterization of the electronic state reconstruction in the nematic phase is thus crucial. However, most experiments focus only on the reconstruction of band dispersions. Another important characteristic of electronic state, the spectral weight, has not been studied in details so far. Here, we studied the spectral weight transfer in the nematic phase of FeSe_0.9S_0.1 using angle-resolved photoemission spectroscopy and in-situ detwinning technique. There are two elliptical electron pockets overlapping with each other orthogonally at the Brillouin zone corner. We found that, upon cooling, one electron pocket loses spectral weight and fades away, while the other electron pocket gains spectral weight and becomes pronounced. Our results show that the symmetry breaking of the electronic state is manifested by not only the anisotropic band dispersion but also the band-selective modulation of the spectral weight. Our observation completes our understanding of the nematic electronic state, and put strong constraints on the theoretical models. It further provides crucial clues to understand the gap anisotropy and orbital-selective pairing in iron-selenide superconductors.

Key words: nematic order, superconductivity, iron-based superconductors, angle-resolved photoemission spectroscopy

中图分类号: (Electronic structure (photoemission, etc.))

74.25.Jb

74.70.Xa (Pnictides and chalcogenides) 79.60.-i (Photoemission and photoelectron spectra) 73.21.Ac (Multilayers)

蔡淙, 韩婷婷, 王政国, 陈磊, 王宇迪, 信子鸣, 马明伟, 李源, 张焱. Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor[J]. 中国物理B, 2020, 29(7): 77401-077401.

C Cai(蔡淙), T T Han(韩婷婷), Z G Wang(王政国), L Chen(陈磊), Y D Wang(王宇迪), Z M Xin(信子鸣), M W Ma(马明伟), Yuan Li(李源), Y Zhang(张焱). Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor[J]. Chin. Phys. B, 2020, 29(7): 77401-077401.

参考文献 30

[1]	Fernandes R M, Chubukov A V and Schmalian J 2014 Nat. Phys. 10 97 doi: 10.1038/nphys2877
[2]	Chu J H, Kuo H H, Analytis J G and Fisher I R 2012 Science 337 710 doi: 10.1126/science.1221713
[3]	Johnston D C 2010 Adv. Phys. 59 803 doi: 10.1080/00018732.2010.513480
[4]	Huang Q, Qiu Y, Bao W, Green M A, Lynn J W, Gasparovic Y C, Wu T, Wu G and Chen X H 2008 Phys. Rev. Lett. 101 257003 doi: 10.1103/PhysRevLett.101.257003
[5]	Lv W, Wu J and Phillips P 2009 Phys. Rev. B 80 224506 doi: 10.1103/PhysRevB.80.224506
[6]	Chen C C, Maciejko J, Sorini A P, Moritz B, Singh R R P and Devereaux T P 2010 Phys. Rev. B 82 100504 doi: 10.1103/PhysRevB.82.100504
[7]	Lee C C, Yin W G and Ku W 2009 Phys. Rev. Lett. 103 267001 doi: 10.1103/PhysRevLett.103.267001
[8]	Su Y, Liao H and Li T 2015 J. Phys.: Condens. Matter. 27 105702 doi: 10.1088/0953-8984/27/10/105702
[9]	Zhang P, Qian T, Richard P, Wang X P, Miao H, Lv B Q, Fu B B, Wolf T, Meingast C, Wu X X, Wang Z Q, Hu J P and Ding H 2015 Phys. Rev. B 91 214503 doi: 10.1103/PhysRevB.91.214503
[10]	Fang C, Yao H, Tsai W F, Hu J P and Kivelson S A 2008 Phys. Rev. B 77 224509 doi: 10.1103/PhysRevB.77.224509
[11]	Fernandes R M, Chubukov A V, Knolle J, Eremin I and Schmalian J 2012 Phys. Rev. B 85 024534 doi: 10.1103/PhysRevB.85.024534
[12]	Zhang Y, Yi M, Liu Z K, Li W, Lee J J, Moore R G, Hashimoto M, Nakajima M, Eisaki H, Mo S K, Hussain Z, Devereaux T P, Shen Z X and Lu D H 2016 Phys. Rev. B 94 115153 doi: 10.1103/PhysRevB.94.115153
[13]	Yi M, Zhang Y, Heike P, Chen T, Ye Z R, Hashimoto M, Yu R, Si Q, Lee D H, Dai P C, Shen Z X, Lu D H and Birgeneau R J 2019 Phys. Rev. X 9 041049
[14]	Shimojima T, Suzuki Y, Sonobe T, Nakamura A, Sakano M, Omachi J, Yoshioka K, Kuwata-Gonokami M, Ono K, Kumigashira H, Böhmer A E, Hardy F, Wolf T, Meingast C, Löhnysen H, Ikeda H and Ishizaka K 2014 Phys. Rev. B 90 121111 doi: 10.1103/PhysRevB.90.121111
[15]	Watson M D, Haghighirad A A, Rhodes L C, Hoesch M and Kim T K 2017 New. J. Phys. 19 103021 doi: 10.1088/1367-2630/aa8a04
[16]	Fedorov A, Yaresko A, Kim T K, Kushnirenko E, Haubold E, Wolf T Hoesch M, Grüeneis A, Büchner B and Borisenko S V 2016 Sci. Rep. 6 36834 doi: 10.1038/srep36834
[17]	McQueen T M, Williams A J, Stephens P W, Tao J, Zhu Y, Ksenofontov V, Casper F, Felser C and Cava R J 2009 Phys. Rev. Lett. 103 057002 doi: 10.1103/PhysRevLett.103.057002
[18]	Böhmer A E, Taufour V, Straszheim W E, Wolf T and Canfield P C 2016 Phys. Rev. B 94 024526 doi: 10.1103/PhysRevB.94.024526
[19]	Hicks C W, Barber M E, Edkins S D, Brodsky D O and Mackenzie A P 2014 Rev. Sci. Instr. 85 065003 doi: 10.1063/1.4881611
[20]	Pfau H, Chen S D, Yi M, Hashimoto M, Rotundu C R, Palmstrom J C, Chen T, Dai P C, Straquadine J, Hristov A, Birgeneau R J, Fisher I R, Lu D H and Shen Z X 2019 Phys. Rev. Lett. 123 066402 doi: 10.1103/PhysRevLett.123.066402
[21]	Graser S, Maier T A, Hirschfeld P J and Scalapino D J 2009 New J. Phys. 11 025016 doi: 10.1088/1367-2630/11/2/025016
[22]	Fisher I R, Degiorgi L and Shen Z X 2011 Rep. Prog. Phys. 74 124506 doi: 10.1088/0034-4885/74/12/124506
[23]	Zhang Y, He C, Ye Z R, Jiang J, Chen F, Xu M, Ge Q Q, Xie B P, Wei J, Aeschlimann M, Cui X Y, Shi M, Hu J P and Feng D L 2012 Phys. Rev. B 85 085121 doi: 10.1103/PhysRevB.85.085121
[24]	Brouet V, Jensen M F, Lin P H, Taleb-Ibrahimi A, Le Févre P, Bertran F, Lin C, Ku W, Forget A and Colson D 2012 Phys. Rev. B 86 075123 doi: 10.1103/PhysRevB.86.075123
[25]	Yu R and Si Q M 2011 Phys. Rev. B 84 235115 doi: 10.1103/PhysRevB.84.235115
[26]	Yi M, Liu Z K, Zhang Y, et al. 2015 Nat. Commun. 6 7777 doi: 10.1038/ncomms8777
[27]	Zhang Y, Chen F, He C, Zhou B, Xie B P, Fang C, Tsai W F, Chen X H, Hayashi H, Jiang J, Iwasawa H, Shimada K, Namatame H, Taniguchi M, Hu J P and Feng D L 2011 Phys. Rev. B 83 054510 doi: 10.1103/PhysRevB.83.054510
[28]	Wang Q S, Shen Y, Pan B Y, Hao Y Q, Ma M W, Zhou F, Steffens P, Schmalzl K, Forrest T R, Abdel-Hafiez M, Chen X J, Chareev D A, Vasiliev A N, Bourges P, Sidis Y, Cao H B and Zhao J 2016 Nat. Mater. 15 159 doi: 10.1038/nmat4492
[29]	Sprau P O, Kostin A, Kreisel A, Böhmer A E, Taufour V, Canfield P C, Mukherjee S, Hirschfeld P J, Andersen B M and Séamus Davis J C 2017 Science 357 75 doi: 10.1126/science.aal1575
[30]	Xu H C, Niu X H, Xu D F, Jiang J, Chen Q Y, Song Q, Abdel-Hafiez M, Chareev D A, Vasiliev A N, Wang Q S, Wo H L, Zhao J, Peng R and Feng D L 2016 Phys. Rev. Lett. 117 157003 doi: 10.1103/PhysRevLett.117.157003

Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor

Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor

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