Quasiparticle Interference Studies of Quantum Materials. Issue 41 (3rd June 2018)

• Record Type: Journal Article
• Authors: Avraham, Nurit; Reiner, Jonathan; Kumar‐Nayak, Abhay; Morali, Noam; Batabyal, Rajib; Yan, Binghai; Beidenkopf, Haim
• Is Part Of: Advanced materials. Volume 30:Issue 41(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-06-03
• Subjects: scanning tunneling microscopy -- semiconducting nanowires -- topological insulators -- topological materials -- Weyl semimetals; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201707628
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Exotic electronic states are realized in novel quantum materials. This field is revolutionized by the topological classification of materials. Such compounds necessarily host unique states on their boundaries. Scanning tunneling microscopy studies of these surface states have provided a wealth of spectroscopic characterization, with the successful cooperation of ab initio calculations. The method of quasiparticle interference imaging proves to be particularly useful for probing the dispersion relation of the surface bands. Herein, how a variety of additional fundamental electronic properties can be probed via this method is reviewed. It is demonstrated how quasiparticle interference measurements entail mesoscopic size quantization and the electronic phase coherence in semiconducting nanowires; helical spin protection and energy‐momentum fluctuations in a topological insulator; and the structure of the Bloch wave function and the relative insusceptibility of topological electronic states to surface potential in a topological Weyl semimetal. Abstract : Quasiparticle interference pattern electrons embedded in the local density of states are visualized through scanning tunneling spectroscopy. This is utilized to image and characterize various topological electronic states including semiconducting nanowires, topological insulators, and Weyl semimetals.