Metastable short-range charge order in superconducting CuxTiSe2
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916062055890944 |
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| author | Sutter, Thomas Lindenau, Colleen Sharma, Shivani Fluerasu, Andrei Wiegart, Lutz Karapetrov, Goran Kogar, Anshul Chen, Xiaoqian M |
| author_facet | Sutter, Thomas Lindenau, Colleen Sharma, Shivani Fluerasu, Andrei Wiegart, Lutz Karapetrov, Goran Kogar, Anshul Chen, Xiaoqian M |
| contents | In a vast array of materials, including cuprates, transition metal dichalcogenides (TMDs) and rare earth tritellurides, superconductivity is found in the vicinity of short-range charge density wave (CDW) order. The crossover from long-range to short-range charge order often occurs as quenched disorder is introduced, yet it is unclear how this disorder disrupts the CDW. Here, using x-ray photon correlation spectroscopy (XPCS), we investigate the prototypical TMD superconductor CuxTiSe2 and show that disorder induces substantial CDW dynamics. We observe CDW phase fluctuations on a timescale of minutes to hours above the nominal transition temperature while the order parameter amplitude remains finite. These long timescale fluctuations prevent the system from finding the global free energy minimum upon cooling and ultimately traps it in a short-range ordered metastable state. Our findings demonstrate how correlated disorder can give rise to a distinct mechanism of domain formation that may be advantageous to the emergence of superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03176 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Metastable short-range charge order in superconducting CuxTiSe2 Sutter, Thomas Lindenau, Colleen Sharma, Shivani Fluerasu, Andrei Wiegart, Lutz Karapetrov, Goran Kogar, Anshul Chen, Xiaoqian M Strongly Correlated Electrons In a vast array of materials, including cuprates, transition metal dichalcogenides (TMDs) and rare earth tritellurides, superconductivity is found in the vicinity of short-range charge density wave (CDW) order. The crossover from long-range to short-range charge order often occurs as quenched disorder is introduced, yet it is unclear how this disorder disrupts the CDW. Here, using x-ray photon correlation spectroscopy (XPCS), we investigate the prototypical TMD superconductor CuxTiSe2 and show that disorder induces substantial CDW dynamics. We observe CDW phase fluctuations on a timescale of minutes to hours above the nominal transition temperature while the order parameter amplitude remains finite. These long timescale fluctuations prevent the system from finding the global free energy minimum upon cooling and ultimately traps it in a short-range ordered metastable state. Our findings demonstrate how correlated disorder can give rise to a distinct mechanism of domain formation that may be advantageous to the emergence of superconductivity. |
| title | Metastable short-range charge order in superconducting CuxTiSe2 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.03176 |