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  Orbital-and kz-Selective Hybridization of Se 4p and Ti 3d States in the Charge Density Wave Phase of TiSe2

Watson, M. D., Clark, O. J., Mazzola, F., Markovic, I., Sunko, V., Kim, T. K., et al. (2019). Orbital-and kz-Selective Hybridization of Se 4p and Ti 3d States in the Charge Density Wave Phase of TiSe2. Physical Review Letters, 122(7): 076404, pp. 1-6. doi:10.1103/PhysRevLett.122.076404.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-31D1-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-31D3-7
Genre: Journal Article

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 Creators:
Watson, Matthew D.1, Author
Clark, Oliver J.1, Author
Mazzola, Federico1, Author
Markovic, Igor1, Author
Sunko, Veronika2, Author              
Kim, Timur K.1, Author
Rossnagel, Kai1, Author
King, Philip D. C.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: We revisit the enduring problem of the 2 x 2 x 2 charge density wave (CDW) order in TiSe2, utilizing photon energy-dependent angle-resolved photoemission spectroscopy to probe the full three-dimensional high- and low-temperature electronic structure. Our measurements demonstrate how a mismatch of dimensionality between the 3D conduction bands and the quasi-2D valence bands in this system leads to a hybridization that is strongly k(z) dependent. While such a momentum-selective coupling can provide the energy gain required to form the CDW, we show how additional "passenger" states remain, which couple only weakly to the CDW and thus dominate the low-energy physics in the ordered phase of TiSe2.

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Language(s): eng - English
 Dates: 2019-02-222019-02-22
 Publication Status: Published in print
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 122 (7) Sequence Number: 076404 Start / End Page: 1 - 6 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1