Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45

Chatzopoulos, Damianos; Cho, Doohee; Bastiaans, Koen M.; Steffensen, Gorm O.; Bouwmeester, Damian; Akbari, Alireza; Gu, Genda; Paaske, Jens; Andersen, Brian M.; Allan, Milan P.

doi:10.1038/s41467-020-20529-x

Title: Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe_0.55Se_0.45

Journal Article · Tue Jan 12 00:00:00 EST 2021 · Nature Communications

DOI:https://doi.org/10.1038/s41467-020-20529-x· OSTI ID:1807948

Chatzopoulos, Damianos ^[1]; Cho, Doohee ^[2]; Bastiaans, Koen M. ^[1]; Steffensen, Gorm O. ^[3]; Bouwmeester, Damian ^[4]; Akbari, Alireza ^[5];

^[6]; Paaske, Jens ^[3]; Andersen, Brian M. ^[3];

^[1]

Leiden Univ. (Netherlands)
Leiden Univ. (Netherlands); Yonsei University, Seoul (Korea, Republic of)
Univ. of Copenhagen (Denmark). The Niels Bohr Inst., Center for Quantum Devices
Leiden Univ. (Netherlands); Delft Univ. of Technology (Netherlands). Kavli Institute of Nanoscience
Max Planck Institute for the Chemical Physics of Solids, Dresden (Germany); Max Planck POSTECH Center for Complex Phase Materials, POSTECH, Pohang, Gyeongbuk (Korea, Republic of)
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

By using scanning tunneling microscopy (STM) we find and characterize dispersive, energy-symmetric in-gap states in the iron-based superconductor FeTe_0.55Se_0.45, a material that exhibits signatures of topological superconductivity, and Majorana bound states at vortex cores or at impurity locations. We use a superconducting STM tip for enhanced energy resolution, which enables us to show that impurity states can be tuned through the Fermi level with varying tip-sample distance. We find that the impurity state is of the Yu-Shiba-Rusinov (YSR) type, and argue that the energy shift is caused by the low superfluid density in FeTe_0.55Se_0.45, which allows the electric field of the tip to slightly penetrate the sample. We model the newly introduced tip-gating scenario within the single-impurity Anderson model and find good agreement to the experimental data.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704

OSTI ID:: 1807948

Report Number(s):: BNL-221810-2021-JAAM; TRN: US2212865

Journal Information:: Nature Communications, Vol. 12, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

References (62)

Imaging doubled shot noise in a Josephson scanning tunneling microscope Bastiaans, K. M.; Cho, D.; Chatzopoulos, D. Physical Review B, Vol. 100, Issue 10 https://doi.org/10.1103/PhysRevB.100.104506	journal	September 2019
Shot noise in a Majorana fermion chain Golub, Anatoly; Horovitz, Baruch Physical Review B, Vol. 83, Issue 15 https://doi.org/10.1103/PhysRevB.83.153415	journal	April 2011
Competition of Superconducting Phenomena and Kondo Screening at the Nanoscale Franke, K. J.; Schulze, G.; Pascual, J. I. Science, Vol. 332, Issue 6032 https://doi.org/10.1126/science.1202204	journal	May 2011
Tuning Yu-Shiba-Rusinov states in a quantum dot Jellinggaard, Anders; Grove-Rasmussen, Kasper; Madsen, Morten Hannibal Physical Review B, Vol. 94, Issue 6 https://doi.org/10.1103/PhysRevB.94.064520	journal	August 2016
Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+δ Hudson, E. W.; Lang, K. M.; Madhavan, V. Nature, Vol. 411, Issue 6840 https://doi.org/10.1038/35082019	journal	June 2001
Topological superconductivity with deformable magnetic skyrmions Garnier, Maxime; Mesaros, Andrej; Simon, Pascal Communications Physics, Vol. 2, Issue 1 https://doi.org/10.1038/s42005-019-0226-5	journal	October 2019
Tuning the Coupling of an Individual Magnetic Impurity to a Superconductor: Quantum Phase Transition and Transport Farinacci, Laëtitia; Ahmadi, Gelavizh; Reecht, Gaël Physical Review Letters, Vol. 121, Issue 19 https://doi.org/10.1103/PhysRevLett.121.196803	journal	November 2018
Coherent long-range magnetic bound states in a superconductor Ménard, Gerbold C.; Guissart, Sébastien; Brun, Christophe Nature Physics, Vol. 11, Issue 12 https://doi.org/10.1038/nphys3508	journal	October 2015
Quantum phase transitions and the role of impurity-substrate hybridization in Yu-Shiba-Rusinov states Huang, Haonan; Drost, Robert; Senkpiel, Jacob Communications Physics, Vol. 3, Issue 1 https://doi.org/10.1038/s42005-020-00469-0	journal	November 2020
Impurity states in multiband $s$ -wave superconductors: Analysis of iron pnictides Beaird, R.; Vekhter, I.; Zhu, Jian-Xin Physical Review B, Vol. 86, Issue 14 https://doi.org/10.1103/PhysRevB.86.140507	journal	October 2012
Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy Battisti, I.; Fedoseev, V.; Bastiaans, K. M. Physical Review B, Vol. 95, Issue 23 https://doi.org/10.1103/PhysRevB.95.235141	journal	June 2017
Spatial fluctuations of helical Dirac fermions on the surface of topological insulators Beidenkopf, Haim; Roushan, Pedram; Seo, Jungpil Nature Physics, Vol. 7, Issue 12 https://doi.org/10.1038/nphys2108	journal	October 2011
Towards a quantitative description of tunneling conductance of superconductors: Application to LiFeAs Kreisel, A.; Nelson, R.; Berlijn, T. Physical Review B, Vol. 94, Issue 22 https://doi.org/10.1103/PhysRevB.94.224518	journal	December 2016
Topological nature of the ${FeSe}_{0.5} {Te}_{0.5}$ superconductor Wang, Zhijun; Zhang, P.; Xu, Gang Physical Review B, Vol. 92, Issue 11 https://doi.org/10.1103/PhysRevB.92.115119	journal	September 2015
Topological Superconductivity on the Surface of Fe-Based Superconductors Xu, Gang; Lian, Biao; Tang, Peizhe Physical Review Letters, Vol. 117, Issue 4 https://doi.org/10.1103/PhysRevLett.117.047001	journal	July 2016
Anisotropic impurity states, quasiparticle scattering and nematic transport in underdoped Ca(Fe1−xCox)2As2 Allan, M. P.; Chuang, T-M.; Massee, F. Nature Physics, Vol. 9, Issue 4 https://doi.org/10.1038/nphys2544	journal	February 2013
Universal $2 Δ_{max} / k_{B} T_{c}$ scaling decoupled from the electronic coherence in iron-based superconductors Miao, H.; Brito, W. H.; Yin, Z. P. Physical Review B, Vol. 98, Issue 2 https://doi.org/10.1103/PhysRevB.98.020502	journal	July 2018
Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor Zhu, Shiyu; Kong, Lingyuan; Cao, Lu Science https://doi.org/10.1126/science.aax0274	journal	December 2019
Classical Spins in Superconductors Shiba, Hiroyuki Progress of Theoretical Physics, Vol. 40, Issue 3 https://doi.org/10.1143/PTP.40.435	journal	September 1968
Yu-Shiba-Rusinov states in phase-biased superconductor–quantum dot–superconductor junctions Kiršanskas, Gediminas; Goldstein, Moshe; Flensberg, Karsten Physical Review B, Vol. 92, Issue 23 https://doi.org/10.1103/PhysRevB.92.235422	journal	December 2015
Yu–Shiba–Rusinov screening of spins in double quantum dots Grove-Rasmussen, K.; Steffensen, G.; Jellinggaard, A. Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-04683-x	journal	June 2018
Single Si dopants in GaAs studied by scanning tunneling microscopy and spectroscopy Wijnheijmer, A. P.; Garleff, J. K.; Teichmann, K. Physical Review B, Vol. 84, Issue 12 https://doi.org/10.1103/PhysRevB.84.125310	journal	September 2011
Discrete energy levels of Caroli-de Gennes-Matricon states in quantum limit in FeTe0.55Se0.45 Chen, Mingyang; Chen, Xiaoyu; Yang, Huan Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-03404-8	journal	March 2018
Vacuum tunneling of superconducting quasiparticles from atomically sharp scanning tunneling microscope tips Pan, S. H.; Hudson, E. W.; Davis, J. C. Applied Physics Letters, Vol. 73, Issue 20 https://doi.org/10.1063/1.122654	journal	November 1998
A strongly inhomogeneous superfluid in an iron-based superconductor Cho, D.; Bastiaans, K. M.; Chatzopoulos, D. Nature, Vol. 571, Issue 7766 https://doi.org/10.1038/s41586-019-1408-8	journal	July 2019
Shallow pockets and very strong coupling superconductivity in FeSexTe1−x Lubashevsky, Y.; Lahoud, E.; Chashka, K. Nature Physics, Vol. 8, Issue 4 https://doi.org/10.1038/nphys2216	journal	February 2012
Impurity-induced bound states in iron-based superconductors with $s$ -wave $cos k_{x} \cdot cos k_{y}$ pairing symmetry Tsai, Wei-Feng; Zhang, Yan-Yang; Fang, Chen Physical Review B, Vol. 80, Issue 6 https://doi.org/10.1103/PhysRevB.80.064513	journal	August 2009
Topological characters in $Fe ({Te}_{1 - x} {Se}_{x})$ thin films Wu, Xianxin; Qin, Shengshan; Liang, Yi Physical Review B, Vol. 93, Issue 11 https://doi.org/10.1103/PhysRevB.93.115129	journal	March 2016
Impurity effects on the $\pm s$ -wave state of the iron-based superconductors Bang, Yunkyu; Choi, Han-Yong; Won, Hyekyung Physical Review B, Vol. 79, Issue 5 https://doi.org/10.1103/PhysRevB.79.054529	journal	February 2009
On the Remarkable Superconductivity of FeSe and Its Close Cousins Kreisel, Andreas; Hirschfeld, Peter J.; Andersen, Brian M. Symmetry, Vol. 12, Issue 9 https://doi.org/10.3390/sym12091402	journal	August 2020
On the use of STM superconducting tips at very low temperatures Rodrigo, J. G.; Suderow, H.; Vieira, S. The European Physical Journal B, Vol. 40, Issue 4 https://doi.org/10.1140/epjb/e2004-00273-y	journal	August 2004
Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te) Machida, T.; Sun, Y.; Pyon, S. Nature Materials, Vol. 18, Issue 8 https://doi.org/10.1038/s41563-019-0397-1	journal	June 2019
Visualization of Local Magnetic Moments Emerging from Impurities in Hund’s Metal States of FeSe Song, Sang Yong; Martiny, J. H. J.; Kreisel, A. Physical Review Letters, Vol. 124, Issue 11 https://doi.org/10.1103/PhysRevLett.124.117001	journal	March 2020
Impurity-induced states in conventional and unconventional superconductors Balatsky, A. V.; Vekhter, I.; Zhu, Jian-Xin Reviews of Modern Physics, Vol. 78, Issue 2 https://doi.org/10.1103/RevModPhys.78.373	journal	May 2006
Direct Measurement of Quasiparticle-Lifetime Broadening in a Strong-Coupled Superconductor Dynes, R. C.; Narayanamurti, V.; Garno, J. P. Physical Review Letters, Vol. 41, Issue 21 https://doi.org/10.1103/PhysRevLett.41.1509	journal	November 1978
Imaging Quasiparticle Interference in Bi₂Sr₂CaCu₂O_8+δ Hoffman, J. E.; McElroy, K.; Lee, D.-H. Science, Vol. 297, Issue 5584, p. 1148-1151 https://doi.org/10.1126/science.1072640	journal	July 2002
Tunable Spin–Superconductor Coupling of Spin 1/2 Vanadyl Phthalocyanine Molecules Malavolti, Luigi; Briganti, Matteo; Hänze, Max Nano Letters, Vol. 18, Issue 12 https://doi.org/10.1021/acs.nanolett.8b03921	journal	November 2018
In-gap bound states induced by nonmagnetic impurities in two-band $s_{\pm}$ superconductors Ng, T. K.; Avishai, Y. Physical Review B, Vol. 80, Issue 10 https://doi.org/10.1103/PhysRevB.80.104504	journal	September 2009
Tuning across the BCS-BEC crossover in the multiband superconductor Fe _{1+ y} Se _x Te _{1− x} : An angle-resolved photoemission study Rinott, Shahar; Chashka, K. B.; Ribak, Amit Science Advances, Vol. 3, Issue 4 https://doi.org/10.1126/sciadv.1602372	journal	April 2017
${FeTe}_{0.55} {Se}_{0.45}$ : A multiband superconductor in the clean and dirty limit Homes, C. C.; Dai, Y. M.; Wen, J. S. Physical Review B, Vol. 91, Issue 14 https://doi.org/10.1103/PhysRevB.91.144503	journal	April 2015
Numerical subgap spectroscopy of double quantum dots coupled to superconductors Žitko, Rok Physical Review B, Vol. 91, Issue 16 https://doi.org/10.1103/PhysRevB.91.165116	journal	April 2015
Tunnelling dynamics between superconducting bound states at the atomic limit Huang, Haonan; Padurariu, Ciprian; Senkpiel, Jacob Nature Physics, Vol. 16, Issue 12 https://doi.org/10.1038/s41567-020-0971-0	journal	July 2020
Evidence for dispersing 1D Majorana channels in an iron-based superconductor Wang, Zhenyu; Rodriguez, Jorge Olivares; Jiao, Lin Science, Vol. 367, Issue 6473 https://doi.org/10.1126/science.aaw8419	journal	January 2020
Two-dimensional topological superconductivity in Pb/Co/Si(111) Ménard, Gerbold C.; Guissart, Sébastien; Brun, Christophe Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/s41467-017-02192-x	journal	December 2017
Observation of a robust zero-energy bound state in iron-based superconductor Fe(Te,Se) Yin, J-X.; Wu, Zheng; Wang, J-H. Nature Physics, Vol. 11, Issue 7 https://doi.org/10.1038/nphys3371	journal	June 2015
Spin mapping at the nanoscale and atomic scale Wiesendanger, Roland Reviews of Modern Physics, Vol. 81, Issue 4 https://doi.org/10.1103/RevModPhys.81.1495	journal	November 2009
Tunneling Processes into Localized Subgap States in Superconductors Ruby, Michael; Pientka, Falko; Peng, Yang Physical Review Letters, Vol. 115, Issue 8 https://doi.org/10.1103/PhysRevLett.115.087001	journal	August 2015
Photon-assisted tunneling through a topological superconductor with Majorana bound states Tang, Han-Zhao; Zhang, Ying-Tao; Liu, Jian-Jun AIP Advances, Vol. 5, Issue 12 https://doi.org/10.1063/1.4939096	journal	December 2015
Observation of topological superconductivity on the surface of an iron-based superconductor Zhang, Peng; Yaji, Koichiro; Hashimoto, Takahiro Science, Vol. 360, Issue 6385 https://doi.org/10.1126/science.aan4596	journal	March 2018
Amorphous topological superconductivity in a Shiba glass Pöyhönen, Kim; Sahlberg, Isac; Westström, Alex Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-04532-x	journal	May 2018
Observation of Majorana fermions in ferromagnetic atomic chains on a superconductor Nadj-Perge, S.; Drozdov, I. K.; Li, J. Science, Vol. 346, Issue 6209 https://doi.org/10.1126/science.1259327	journal	October 2014
Anisotropic superconducting properties of single-crystalline ${FeSe}_{0.5} {Te}_{0.5}$ Bendele, M.; Weyeneth, S.; Puzniak, R. Physical Review B, Vol. 81, Issue 22 https://doi.org/10.1103/PhysRevB.81.224520	journal	June 2010
Theory of Localized Magnetic States in Metals Anderson, P. W. Journal of Applied Physics, Vol. 37, Issue 3 https://doi.org/10.1063/1.1708389	journal	March 1966
Impurity states and cooperative magnetic order in Fe-based superconductors Gastiasoro, Maria N.; Hirschfeld, P. J.; Andersen, Brian M. Physical Review B, Vol. 88, Issue 22 https://doi.org/10.1103/PhysRevB.88.220509	journal	December 2013
Spectral properties of locally correlated electrons in a Bardeen–Cooper–Schrieffer superconductor Bauer, J.; Oguri, A.; Hewson, A. C. Journal of Physics: Condensed Matter, Vol. 19, Issue 48 https://doi.org/10.1088/0953-8984/19/48/486211	journal	November 2007
Single magnetic adsorbates on s -wave superconductors Heinrich, Benjamin W.; Pascual, Jose I.; Franke, Katharina J. Progress in Surface Science, Vol. 93, Issue 1 https://doi.org/10.1016/j.progsurf.2018.01.001	journal	February 2018
Giant Shot Noise from Majorana Zero Modes in Topological Trijunctions Jonckheere, T.; Rech, J.; Zazunov, A. Physical Review Letters, Vol. 122, Issue 9 https://doi.org/10.1103/PhysRevLett.122.097003	journal	March 2019
Imaging Cooper pairing of heavy fermions in CeCoIn5 Allan, M. P.; Massee, F.; Morr, D. K. Nature Physics, Vol. 9, Issue 8 https://doi.org/10.1038/nphys2671	journal	July 2013
Comment on “Charge expulsion and electric field in superconductors” Koyama, Tomio Physical Review B, Vol. 70, Issue 22 https://doi.org/10.1103/PhysRevB.70.226503	journal	December 2004
Visualizing nodal heavy fermion superconductivity in CeCoIn5 Zhou, Brian B.; Misra, Shashank; da Silva Neto, Eduardo H. Nature Physics, Vol. 9, Issue 8 https://doi.org/10.1038/nphys2672	journal	July 2013
Visualization of electron nematicity and unidirectional antiferroic fluctuations at high temperatures in NaFeAs Rosenthal, E. P.; Andrade, E. F.; Arguello, C. J. Nature Physics, Vol. 10, Issue 3 https://doi.org/10.1038/nphys2870	journal	February 2014
Evidence for Majorana bound states in an iron-based superconductor Wang, Dongfei; Kong, Lingyuan; Fan, Peng Science, Vol. 362, Issue 6412 https://doi.org/10.1126/science.aao1797	journal	August 2018

Similar Records

Yu-Shiba-Rusinov States in a Superconductor with Topological Z2 Bands

Journal Article · Mon Jun 06 00:00:00 EDT 2022 · Physical Review Letters · OSTI ID:1807948

Chiu, Ching-Kai; Wang, Ziqiang

Spin-Polarized Yu-Shiba-Rusinov States in an Iron-Based Superconductor

Journal Article · Thu Feb 18 00:00:00 EST 2021 · Physical Review Letters · OSTI ID:1807948

Wang, Dongfei; Wiebe, Jens; Zhong, Ruidan; +2 more

Quasi-2D superconductivity in FeTe_0.55Se_0.45 ultrathin film [Quasi Two-Dimensional Superconductivity in FeTe_0.55Se_0.45 ultrathin film]

Journal Article · Tue Apr 23 00:00:00 EDT 2019 · Journal of Physics. Condensed Matter · OSTI ID:1807948

Tang, Fangdong; Wang, Peipei; Wang, Peng; +5 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY

Title: Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45

Citation Formats

References (62)

Similar Records

Related Subjects

Title: Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe_0.55Se_0.45