Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session L45: Electronic Correlations in di-chalcogenides and Related
11:15 AM–1:51 PM,
Wednesday, March 7, 2018
LACC
Room: 505
Sponsoring
Unit:
DCMP
Chair: Rico Schoenemann, Natl High Magnetic Field Lab
Abstract ID: BAPS.2018.MAR.L45.9
Abstract: L45.00009 : Energy dependent spatial texturing in the CDW of 1T-CuxTiSe2*
12:51 PM–1:03 PM
Presenter:
Marcello Spera
(Univ of Geneva)
Authors:
Marcello Spera
(Univ of Geneva)
Alessandro Scarfato
(Univ of Geneva)
Enrico Giannini
(Univ of Geneva)
Christoph Renner
(Univ of Geneva)
Since the discovery of a Charge Density Wave (CDW) and Cu doping induced SC in TiSe2, this system has become prototypical for studying the interplay between these two states by means of scanning tunneling microscopy.
While the SC in CuxTiSe2 seems to follow a standard BCS behaviour, the microscopic origin of the CDW is still under debate. In order to address this issue, we performed a detailed STM/STS study of the impact of Cu intercalation on the CDW in CuxTiSe2.
The CDW modulation is found to break up in a complex energy and position-dependent texture, which is explained in terms of charge inhomogeneities induced by Cu intercalation. Under certain conditions, the CDW is visible and well developed in all the crystals investigated, including the superconducting ones, suggesting a possible coexistence of SC and CDW order. These findings further invalidate both Fermi surface nesting and excitonic pairing as the primary CDW formation mechanism in this material.
*Swiss National Science Foundation Div II grant 162517
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.L45.9
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