Journal article
Spectroscopic fingerprints of many-body renormalization in 1T-TiSe2
Physical review. B, v 100(4), 045106
08 Jul 2019
Abstract
We have investigated many-body renormalizations of the single-particle excitations in 1T-TiSe2 by employing high resolution angle-resolved photoemission spectroscopy (ARPES) measurements. The energy distribution curves (EDCs) of the ARPES data reveal an intrinsic single band peak-dip-hump (PDH) feature. Furthermore, the renormalized electronic dispersion extracted from the momentum distribution curves (MDCs) highlights a well-defined kink structure. These are canonical signatures of many-body correlations in the system. Theoretical modeling of the electrons coupled to an Einstein mode illustrates that a study of the renormalized dispersion from the MDCs enable direct access to the characteristic features of these many-body correlations, such as the energy scale of the relevant collective mode and the strength of its coupling with the electrons in the system. This model also demonstrates the difficulty to determine these features in a straightforward way from the PDH structure of the EDCs. The self-energy analysis of our ARPES data suggest compelling evidence for a bosonic mode having energy similar to 26 meV, with which the electrons in 1T-TiSe2 couple to. This correlates with the ab initio phonon-dispersion calculations and the observation of breathing (A(1g)) phonon mode in Raman scattering experiments.
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Details
- Title
- Spectroscopic fingerprints of many-body renormalization in 1T-TiSe2
- Creators
- J. Zhao - University of VirginiaKyungmin Lee - The Ohio State UniversityD. B. Lioi - Drexel University, PhysicsG. Karapetrov - Drexel University, PhysicsNandini Trivedi - The Ohio State UniversityU. Chatterjee - University of Virginia
- Publication Details
- Physical review. B, v 100(4), 045106
- Publisher
- Amer Physical Soc
- Number of pages
- 7
- Grant note
- ECCS-1711015 / National Science Foundation; National Science Foundation (NSF) DE-AC02-06CH11357 / US Department of Energy, Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE) DMR-1629237; DMR-1629382 / National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000474369900006
- Scopus ID
- 2-s2.0-85070197361
- Other Identifier
- 991019168434304721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter