Feedback loop dependent charge density wave imaging by scanning tunneling spectroscopy

Article Article scientifique Article Feedback loop dependent charge density wave imaging by scanning tunneling spectroscopy eng 2024-08-05 2024-08-05 author Scarfato Alessandro 0000-0002-5615-766X 780440 MaNEP DIP (MANSC) author Pasztor Arpad 0000-0001-8230-235X 814093 Département de physique de la matière quantique (FIMAC) author Sun Lihuan 0000-0002-4259-3313 928478 Département de physique de la matière quantique (FIMAC) author Maggio-Aprile Ivan 0000-0002-3998-417X 26801 Département de physique de la matière quantique (FIMAC) author Pasquier Vincent 0000-0001-7964-6039 862856 author Singar Tejas Parasram 0009-0006-6474-0835 930515 Département de physique de la matière quantique (FIMAC) author Ørsted Andreas 0009-0008-2982-6603 950100 Département de physique de la matière quantique (FIMAC) author Pushkarna Ishita 0009-0003-4329-0925 950139 Département de physique de la matière quantique (FIMAC) author Spera Marcello 0000-0002-9753-1136 826842 author Giannini Enrico 0000-0003-3536-4771 503364 Département de physique de la matière quantique (FIMAC) author Renner Christoph 0000-0001-9882-681X 24186 Département de physique de la matière quantique (FIMAC) 085109 10.1103/PhysRevB.110.085109 2469-9950 https://link.aps.org/doi/10.1103/PhysRevB.110.085109 <p>Scanning tunneling spectroscopy (STS) is a unique technique to probe the local density of states (LDOS) atthe atomic scale by measuring the tunneling conductance between a sharp tip and a sample surface. However,the technique suffers of well-known limitations, the so-called set-point effect, which can potentially introduceartifacts in the measurements. We compare several STS imaging schemes applied to the LDOS modulations ofthe charge density wave state on atomically flat surfaces, and we demonstrate that only constant-height STS iscapable of mapping the intrinsic LDOS. In the constant-current STS, commonly used and easier to implement,the tip-sample distance variations imposed by the feedback loop result in set-point-dependent STS images andpossibly mislead the identification of the CDW gap edge.</p> Dewey 500.2 Swiss National Science Foundation Electron matter in correlated electron systems 182652 CH Projects 33 Département de physique de la matière quantique 131 false 783 Groupe Renner Physical review. B 110 8 5b5f44e5-898a-450b-9677-d952222bd53c Article (Published version) Restricted Article_scientifique_from_crossref.pdf 3402267 application/pdf ce2519e6f2ca520b7d13ace02cbb124bd1fb4a550352dfecce8e1a65d72de744 86c498fd-cf14-46a5-ba2c-a28cd65a41a9 Article (Submitted version) Public Article_scientifique_from_unpaywall.pdf 9195244 application/pdf 7267e60e3184accb8e665a539ee59ffa4df44dfe9e4b732c933e9cc28f37a3c8 Vignette Public teaser_aou.png 308956 image/png openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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