Unveiling the orbital texture of 1T-TiTe2 using intrinsic linear dichroism in multidimensional photoemission spectroscopy

The momentum-dependent orbital character in crystalline solids, referred to as orbital texture, is of capital importance in the emergence of symmetry-broken collective phases, such as charge density waves as well as superconducting and topological states of matter. By performing extreme ultraviolet...

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Bibliographic Details
Published in:npj quantum materials 2021-11, Vol.6 (1), p.1-11, Article 93
Main Authors: Beaulieu, Samuel, Schüler, Michael, Schusser, Jakub, Dong, Shuo, Pincelli, Tommaso, Maklar, Julian, Neef, Alexander, Reinert, Friedrich, Wolf, Martin, Rettig, Laurenz, Minár, Ján, Ernstorfer, Ralph
Format: Article
Language:English
Subjects:
639/766/119/544
639/766/119/995
Charge density waves
Condensed Matter Physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystal structure
Dichroism
Eigenvalues
MATERIALS SCIENCE
Momentum
Photoelectric emission
Photoelectron spectroscopy
Photoelectrons
Physics
Physics and Astronomy
Quantum Physics
Spectrum analysis
Structural Materials
Surfaces and Interfaces
Symmetry
Texture
Thin Films
Transition metal compounds
Wave functions
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Summary:The momentum-dependent orbital character in crystalline solids, referred to as orbital texture, is of capital importance in the emergence of symmetry-broken collective phases, such as charge density waves as well as superconducting and topological states of matter. By performing extreme ultraviolet multidimensional angle-resolved photoemission spectroscopy for two different crystal orientations linked to each other by mirror symmetry, we isolate and identify the role of orbital texture in photoemission from the transition metal dichalcogenide 1T-TiTe 2 . By comparing our experimental results with theoretical calculations based on both a quantitative one-step model of photoemission and an intuitive tight-binding model, we unambiguously demonstrate the link between the momentum-dependent orbital orientation and the emergence of strong intrinsic linear dichroism in the photoelectron angular distributions. Our results represent an important step towards going beyond band structure (eigenvalues) mapping and learning about electronic wavefunction and orbital texture of solids by exploiting matrix element effects in photoemission spectroscopy.
ISSN:2397-4648
2397-4648
DOI:10.1038/s41535-021-00398-3