Journal article
Doping-induced nematic and stripe orders within the charge density wave state of TiSe 2
Physical review. B, v 112(16), 165119
Oct 2025
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Abstract
In this work, we present a theory to address conflicting experimental claims regarding the charge density wave (CDW) state in TiSe2, including whether there is single or multiple CDW transitions and whether threefold rotation symmetry (𝐶3) is broken. Using a continuum 𝒌·𝒑 model coupled to the CDW order parameter, we show how commonplace conduction band doping induces a nematic transition from a 𝐶3-symmetric 3𝑄 CDW to a 𝐶3-breaking 3𝑄 CDW, which is favored by the large ellipticity of the conduction bands of TiSe2. We also find that a 1𝑄 stripe CDW is generically stabilized for sufficiently high electron doping. We then show how both stripe and nematic CDW states emerge self-consistently from a minimal interacting tight-binding model for both positive and negative initial gaps. Our theory provides a scenario in which, as temperature is lowered, a second 𝐶3-breaking transition may occur or not, depending on the doping level, potentially explaining the experimental variability. These predictions can be further verified with a variety of probes including transport, photoemission, and tunneling.
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Details
- Title
- Doping-induced nematic and stripe orders within the charge density wave state of TiSe 2
- Creators
- Daniel Muñoz-Segovia (Corresponding Author) - Columbia UniversityJörn W. F. Venderbos - Drexel UniversityAdolfo G. Grushin - Institut NéelFernando de Juan - Donostia International Physics Center
- Publication Details
- Physical review. B, v 112(16), 165119
- Publisher
- American Physical Society
- Number of pages
- 22
- Grant note
- Spanish Ministerio de Ciencia, Innovacin y Universidades (MCIU) FPU Fellowship: FPU19/03195 National Science Foundation (NSF) Materials Research Science and Engineering Centers (MRSEC) program through Columbia University under the Precision-Assembled Quantum Materi-als (PAQM): DMR-2011738 European Research Council (ERC): 101042707 National Science Foundation (NSF): DMR-2144352 Spanish MCI/AEI/FEDER: PID2021-128760NB-I00
We are grateful to M. Ugeda, M. Gastiasoro, F. Flicker, J. van Wezel, and M. Watson for interesting discussions on our work. D.M.S. acknowledges support from Spanish Ministerio de Ciencia, Innovacion y Universidades (MCIU) FPU Fellowship No. FPU19/03195, and from the National Science Foundation (NSF) Materials Research Science and Engineering Centers (MRSEC) program through Columbia University under the Precision-Assembled Quantum Materi-als (PAQM) Grant No. DMR-2011738. A.G.G. acknowledges financial support from the European Research Council (ERC) Consolidator grant under Grant Agreement No. 101042707 (TOPOMORPH) . J.W.F.V. was supported by the National Science Foundation (NSF) Award No. DMR-2144352. F.J. acknowledges funding from the Spanish MCI/AEI/FEDER through Grant No. PID2021-128760NB-I00.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics; Materials Science and Engineering
- Web of Science ID
- WOS:001598203400003
- Other Identifier
- 991022123313304721