气候变化领域集成服务门户(CCPortal): Momentum-resolved superconducting energy gaps of Sr2RuO4 from quasiparticle interference imaging

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DOI	10.1073/pnas.1916463117
	Momentum-resolved superconducting energy gaps of Sr2RuO4 from quasiparticle interference imaging
	Sharma R.; Edkins S.D.; Wang Z.; Kostin A.; Sow C.; Maeno Y.; Mackenzie A.P.; Séamus Davis J.C.; Madhavan V.
发表日期	2020
ISSN	0027-8424
起始页码	5222
结束页码	5227
卷号	117 期号:10
英文摘要	Sr2RuO4 has long been the focus of intense research interest because of conjectures that it is a correlated topological superconductor. It is the momentum space (k-space) structure of the superconducting energy gap Δi(k) on each band i that encodes its unknown superconducting order parameter. However, because the energy scales are so low, it has never been possible to directly measure the Δi(k) of Sr2RuO4. Here, we implement Bogoliubov quasiparticle interference (BQPI) imaging, a technique capable of high-precision measurement of multiband Δi(k). At T = 90 mK, we visualize a set of Bogoliubov scattering interference wavevectors qj : j = 1 − 5 consistent with eight gap nodes/minima that are all closely aligned to the (±1, ± 1) crystal lattice directions on both the α and β bands. Taking these observations in combination with other very recent advances in directional thermal conductivity [E. Hassinger et al., Phys. Rev. X 7, 011032 (2017)], temperature-dependent Knight shift [A. Pustogow et al., Nature 574, 72–75 (2019)], time-reversal symmetry conservation [S. Kashiwaya et al., Phys. Rev B, 100, 094530 (2019)], and theory [A. T. Rømer et al., Phys. Rev. Lett. 123, 247001 (2019); H. S. Roising, T. Scaffidi, F. Flicker, G. F. Lange, S. H. Simon, Phys. Rev. Res. 1, 033108 (2019); and O. Gingras, R. Nourafkan, A. S. Tremblay, M. Côté, Phys. Rev. Lett. 123, 217005 (2019)], the BQPI signature of Sr2RuO4 appears most consistent with Δi(k) having dx2−y2 (B1g) symmetry. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Quasiparticle interference; Strontium ruthenate; Superconducting energy gaps
语种	英语
scopus关键词	article; crystal; thermal conductivity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160310
作者单位	Sharma, R., Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, United States, Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory, Upton, NY 11973, United States; Edkins, S.D., Department of Applied Physics, Stanford University, Stanford, CA 94305, United States; Wang, Z., Department of Physics, University of Illinois, Urbana, IL 61801, United States; Kostin, A., Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, United States, Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory, Upton, NY 11973, United States; Sow, C., Department of Physics, Kyoto University, Kyoto, 606-8502, Japan, Department of Physics, Indian Institute of Technology-Kanpur, Uttar Pradesh, 208016, India; Maeno, Y., Department of Physics, Kyoto University, Kyoto, 606-8502, Japan; Mackenzie, A.P., Physics of Quantum Materials Department, Max Planck ...
推荐引用方式 GB/T 7714	Sharma R.,Edkins S.D.,Wang Z.,et al. Momentum-resolved superconducting energy gaps of Sr2RuO4 from quasiparticle interference imaging[J],2020,117(10).
APA	Sharma R..,Edkins S.D..,Wang Z..,Kostin A..,Sow C..,...&Madhavan V..(2020).Momentum-resolved superconducting energy gaps of Sr2RuO4 from quasiparticle interference imaging.Proceedings of the National Academy of Sciences of the United States of America,117(10).
MLA	Sharma R.,et al."Momentum-resolved superconducting energy gaps of Sr2RuO4 from quasiparticle interference imaging".Proceedings of the National Academy of Sciences of the United States of America 117.10(2020).