Scanning tunneling microscopy on cleaved Mn3Sn(0001) surface

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Title:	Scanning tunneling microscopy on cleaved Mn3Sn(0001) surface
Authors:	Hung-Hsiang Yang, Chi-Cheng Lee, Yasuo Yoshida, Muhammad Ikhlas, Takahiro Tomita, Agustinus Nugroho, Taisuke Ozaki, Satoru Nakatsuji, and Yukio Hasegawa
Keywords:	Electronic properties and materials Surfaces;interfaces and thin films
Date:	2019-07-04
Issue Date:	2019-10-03 12:10:45 (UTC+8)
Abstract:	We have studied in-situ cleaved (0001) surfaces of the magnetic Weyl semimetal Mn3Sn by low-temperature scanning tunneling microscopy and spectroscopy (STM/S). It was found that freshly cleaved Mn3Sn surfaces are covered with unknown clusters, and the application of voltage pulses in the tunneling condition was needed to achieve atomically flat surfaces. STM topographs taken on the flat terrace show a bulk-terminated 1 × 1 honeycomb lattice with the Sn site brightest. First-principles calculations reveal that the brightest contrast at the Sn site originates from the surrounding surface Mn d orbitals. Tunneling spectroscopy performed on the as-cleaved and voltage-pulsed surfaces show a prominent semimetal valley near the Fermi energy.
Relation:	Scientific Reports 9, 9677
DOI:	10.1038/s41598-019-45958-7
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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