Evidence for dispersing 1D Majorana channels in an iron-based superconductor
Abstract
The possible realization of Majorana fermions as quasiparticle excitations in condensed-matter physics has created much excitement. Most studies have focused on Majorana bound states; however, propagating Majorana states with linear dispersion have also been predicted. Here, we report scanning tunneling spectroscopic measurements of crystalline domain walls (DWs) in FeSe0.45Te0.55. We located DWs across which the lattice structure shifts by half a unit cell. These DWs have a finite, flat density of states inside the superconducting gap, which is a hallmark of linearly dispersing modes in one dimension. This signature is absent in DWs in the related superconductor, FeSe, which is not in the topological phase. Our joint data are consistent with the observation of dispersing Majorana states at a π-phase shift DW in a proximitized topological material.
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Illinois, Chicago, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1580804
- Alternate Identifier(s):
- OSTI ID: 1599582; OSTI ID: 1618817
- Report Number(s):
- BNL-213631-2020-JAAM
Journal ID: ISSN 0036-8075; /sci/367/6473/104.atom
- Grant/Contract Number:
- SC0014335; SC0012704; FG02-05ER46225
- Resource Type:
- Published Article
- Journal Name:
- Science
- Additional Journal Information:
- Journal Name: Science Journal Volume: 367 Journal Issue: 6473; Journal ID: ISSN 0036-8075
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Wang, Zhenyu, Rodriguez, Jorge Olivares, Jiao, Lin, Howard, Sean, Graham, Martin, Gu, G. D., Hughes, Taylor L., Morr, Dirk K., and Madhavan, Vidya. Evidence for dispersing 1D Majorana channels in an iron-based superconductor. United States: N. p., 2020.
Web. doi:10.1126/science.aaw8419.
Wang, Zhenyu, Rodriguez, Jorge Olivares, Jiao, Lin, Howard, Sean, Graham, Martin, Gu, G. D., Hughes, Taylor L., Morr, Dirk K., & Madhavan, Vidya. Evidence for dispersing 1D Majorana channels in an iron-based superconductor. United States. https://doi.org/10.1126/science.aaw8419
Wang, Zhenyu, Rodriguez, Jorge Olivares, Jiao, Lin, Howard, Sean, Graham, Martin, Gu, G. D., Hughes, Taylor L., Morr, Dirk K., and Madhavan, Vidya. Thu .
"Evidence for dispersing 1D Majorana channels in an iron-based superconductor". United States. https://doi.org/10.1126/science.aaw8419.
@article{osti_1580804,
title = {Evidence for dispersing 1D Majorana channels in an iron-based superconductor},
author = {Wang, Zhenyu and Rodriguez, Jorge Olivares and Jiao, Lin and Howard, Sean and Graham, Martin and Gu, G. D. and Hughes, Taylor L. and Morr, Dirk K. and Madhavan, Vidya},
abstractNote = {The possible realization of Majorana fermions as quasiparticle excitations in condensed-matter physics has created much excitement. Most studies have focused on Majorana bound states; however, propagating Majorana states with linear dispersion have also been predicted. Here, we report scanning tunneling spectroscopic measurements of crystalline domain walls (DWs) in FeSe0.45Te0.55. We located DWs across which the lattice structure shifts by half a unit cell. These DWs have a finite, flat density of states inside the superconducting gap, which is a hallmark of linearly dispersing modes in one dimension. This signature is absent in DWs in the related superconductor, FeSe, which is not in the topological phase. Our joint data are consistent with the observation of dispersing Majorana states at a π-phase shift DW in a proximitized topological material.},
doi = {10.1126/science.aaw8419},
journal = {Science},
number = 6473,
volume = 367,
place = {United States},
year = {2020},
month = {1}
}
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https://doi.org/10.1126/science.aaw8419
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Works referenced in this record:
Superconducting properties of iron chalcogenide thin films
journal, October 2012
- Mele, Paolo
- Science and Technology of Advanced Materials, Vol. 13, Issue 5
Iron-Based Superconductors as Odd-Parity Superconductors
journal, July 2013
- Hu, Jiangping
- Physical Review X, Vol. 3, Issue 3
Anyons in an exactly solved model and beyond
journal, January 2006
- Kitaev, Alexei
- Annals of Physics, Vol. 321, Issue 1
Colloquium : Majorana fermions in nuclear, particle, and solid-state physics
journal, February 2015
- Elliott, Steven R.; Franz, Marcel
- Reviews of Modern Physics, Vol. 87, Issue 1
Toward tailoring Majorana bound states in artificially constructed magnetic atom chains on elemental superconductors
journal, May 2018
- Kim, Howon; Palacio-Morales, Alexandra; Posske, Thore
- Science Advances, Vol. 4, Issue 5
Symmetry and Topology in Superconductors –Odd-Frequency Pairing and Edge States–
journal, January 2012
- Tanaka, Yukio; Sato, Masatoshi; Nagaosa, Naoto
- Journal of the Physical Society of Japan, Vol. 81, Issue 1
Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
journal, August 2010
- Lutchyn, Roman M.; Sau, Jay D.; Das Sarma, S.
- Physical Review Letters, Vol. 105, Issue 7
Non-Abelian Statistics of Half-Quantum Vortices in -Wave Superconductors
journal, January 2001
- Ivanov, D. A.
- Physical Review Letters, Vol. 86, Issue 2
Time-Reversal-Invariant Topological Superconductors and Superfluids in Two and Three Dimensions
journal, May 2009
- Qi, Xiao-Liang; Hughes, Taylor L.; Raghu, S.
- Physical Review Letters, Vol. 102, Issue 18
Odd parity pairing and nodeless antiphase in iron-based superconductors
journal, January 2014
- Hao, Ningning; Hu, Jiangping
- Physical Review B, Vol. 89, Issue 4
Topological nature of the superconductor
journal, September 2015
- Wang, Zhijun; Zhang, P.; Xu, Gang
- Physical Review B, Vol. 92, Issue 11
Evidence for a Modulation of the Superconducting Energy Gap of Optimally Doped Single Crystals Using Laser Angle-Resolved Photoemission Spectroscopy
journal, December 2012
- Okazaki, K.; Ito, Y.; Ota, Y.
- Physical Review Letters, Vol. 109, Issue 23
Topological Superconductivity on the Surface of Fe-Based Superconductors
journal, July 2016
- Xu, Gang; Lian, Biao; Tang, Peizhe
- Physical Review Letters, Vol. 117, Issue 4
Optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45
journal, May 2011
- Homes, Christopher C.; Akrap, Ana; Wen, Jinsheng
- Journal of Physics and Chemistry of Solids, Vol. 72, Issue 5
Helical Liquids and Majorana Bound States in Quantum Wires
journal, October 2010
- Oreg, Yuval; Refael, Gil; von Oppen, Felix
- Physical Review Letters, Vol. 105, Issue 17
Majorana Zero Mode Detected with Spin Selective Andreev Reflection in the Vortex of a Topological Superconductor
journal, June 2016
- Sun, Hao-Hua; Zhang, Kai-Wen; Hu, Lun-Hui
- Physical Review Letters, Vol. 116, Issue 25
Quantized charge transport in chiral Majorana edge modes
journal, November 2017
- Rachel, Stephan; Mascot, Eric; Cocklin, Sagen
- Physical Review B, Vol. 96, Issue 20
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices
journal, April 2012
- Mourik, V.; Zuo, K.; Frolov, S. M.
- Science, Vol. 336, Issue 6084
Search for Majorana Fermions in Superconductors
journal, April 2013
- Beenakker, C. W. J.
- Annual Review of Condensed Matter Physics, Vol. 4, Issue 1
Observation of a robust zero-energy bound state in iron-based superconductor Fe(Te,Se)
journal, June 2015
- Yin, J-X.; Wu, Zheng; Wang, J-H.
- Nature Physics, Vol. 11, Issue 7
New directions in the pursuit of Majorana fermions in solid state systems
journal, June 2012
- Alicea, Jason
- Reports on Progress in Physics, Vol. 75, Issue 7
Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure
journal, July 2017
- He, Qing Lin; Pan, Lei; Stern, Alexander L.
- Science, Vol. 357, Issue 6348
Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide
journal, August 2017
- Sarkar, Saheli; Van Dyke, John; Sprau, Peter O.
- Physical Review B, Vol. 96, Issue 6
Classification of topological insulators and superconductors in three spatial dimensions
journal, November 2008
- Schnyder, Andreas P.; Ryu, Shinsei; Furusaki, Akira
- Physical Review B, Vol. 78, Issue 19
End States and Subgap Structure in Proximity-Coupled Chains of Magnetic Adatoms
journal, November 2015
- Ruby, Michael; Pientka, Falko; Peng, Yang
- Physical Review Letters, Vol. 115, Issue 19
First Investigation of Pressure Effects on Transition from Superconductive to Metallic Phase in FeSe 0.5 Te 0.5
journal, June 2009
- Horigane, Kazumasa; Takeshita, Nao; Lee, Chul-Ho
- Journal of the Physical Society of Japan, Vol. 78, Issue 6
Unconventional s-Wave Superconductivity in Fe(Se,Te)
journal, April 2010
- Hanaguri, T.; Niitaka, S.; Kuroki, K.
- Science, Vol. 328, Issue 5977
Teoria simmetrica dell’elettrone e del positrone
journal, April 1937
- Majorana, Ettore
- Il Nuovo Cimento, Vol. 14, Issue 4
Non-Abelian anyons and topological quantum computation
journal, September 2008
- Nayak, Chetan; Simon, Steven H.; Stern, Ady
- Reviews of Modern Physics, Vol. 80, Issue 3
Exponential protection of zero modes in Majorana islands
journal, March 2016
- Albrecht, S. M.; Higginbotham, A. P.; Madsen, M.
- Nature, Vol. 531, Issue 7593
Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe Se
journal, March 2012
- Miao, H.; Richard, P.; Tanaka, Y.
- Physical Review B, Vol. 85, Issue 9
Paired states of fermions in two dimensions with breaking of parity and time-reversal symmetries and the fractional quantum Hall effect
journal, April 2000
- Read, N.; Green, Dmitry
- Physical Review B, Vol. 61, Issue 15
Fault-tolerant quantum computation by anyons
journal, January 2003
- Kitaev, A. Yu.
- Annals of Physics, Vol. 303, Issue 1
Topological Phases in the Single-Layer FeSe
journal, September 2014
- Hao, Ningning; Hu, Jiangping
- Physical Review X, Vol. 4, Issue 3
Observation of topological superconductivity on the surface of an iron-based superconductor
journal, March 2018
- Zhang, Peng; Yaji, Koichiro; Hashimoto, Takahiro
- Science, Vol. 360, Issue 6385
Discrete energy levels of Caroli-de Gennes-Matricon states in quantum limit in FeTe0.55Se0.45
journal, March 2018
- Chen, Mingyang; Chen, Xiaoyu; Yang, Huan
- Nature Communications, Vol. 9, Issue 1
Atomic-scale interface engineering of Majorana edge modes in a 2D magnet-superconductor hybrid system
journal, July 2019
- Palacio-Morales, Alexandra; Mascot, Eric; Cocklin, Sagen
- Science Advances, Vol. 5, Issue 7
Observation of Majorana fermions in ferromagnetic atomic chains on a superconductor
journal, October 2014
- Nadj-Perge, S.; Drozdov, I. K.; Li, J.
- Science, Vol. 346, Issue 6209
Topological characters in thin films
journal, March 2016
- Wu, Xianxin; Qin, Shengshan; Liang, Yi
- Physical Review B, Vol. 93, Issue 11
Zero-bias peaks and splitting in an Al–InAs nanowire topological superconductor as a signature of Majorana fermions
journal, November 2012
- Das, Anindya; Ronen, Yuval; Most, Yonatan
- Nature Physics, Vol. 8, Issue 12
Intra-unit-cell electronic nematicity of the high-Tc copper-oxide pseudogap states
journal, July 2010
- Lawler, M. J.; Fujita, K.; Lee, Jhinhwan
- Nature, Vol. 466, Issue 7304
Helical Hinge Majorana Modes in Iron-Based Superconductors
journal, May 2019
- Zhang, Rui-Xing; Cole, William S.; Das Sarma, S.
- Physical Review Letters, Vol. 122, Issue 18
Gap symmetry and structure of Fe-based superconductors
journal, October 2011
- Hirschfeld, P. J.; Korshunov, M. M.; Mazin, I. I.
- Reports on Progress in Physics, Vol. 74, Issue 12
Evidence for Majorana bound states in an iron-based superconductor
journal, August 2018
- Wang, Dongfei; Kong, Lingyuan; Fan, Peng
- Science, Vol. 362, Issue 6412
Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)
journal, June 2019
- Machida, T.; Sun, Y.; Pyon, S.
- Nature Materials, Vol. 18, Issue 8