Universal phase diagram of superconductivity and charge density wave versus high hydrostatic pressure in pure and Se-doped 1T−TaS2
Bosen Wang, Yu Liu, Xuan Luo, Kento Ishigaki, Kazuyuki Matsubayashi, Wenjian Lu, Yuping Sun, Jinguang Cheng, Yoshiya Uwatoko
DOI 10.1103/PhysRevB.97.220504 · Physical Review B
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Abstract
The coexistence of superconductivity (SC) and charge density waves (CDWs) was investigated for pure and Se-doped 1T−TaS2 via electrical resistivity under hydrostatic pressure. A universal superconducting phase diagram was revealed on the border of CDWs. Unlike isovalent S/Se doping and uniaxial pressure, the application of high hydrostatic pressure suppresses CDW more sensitively and thoroughly with the critical pressures Pc(x)∼4.70–6.55 GPa. A pressure-induced superconducting state coexists with various CDWs, then bulk SC emerges along with the complete collapse of various CDWs. The superconducting transition temperature increases monotonously up to ∼7.3K at 15 GPa without a domelike shape. The results clarify that the superconducting Cooper pairing is associated with the CDWs’ instability near Pc(x). Above Pc(x), the monotonous increase of Tc is attributed to different evolutions of the electronic structures and phonon vibration spectra under hydrostatic and uniaxial pressures and a further inhibition of undetected CDWs.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| TaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.3 | 15 GPa | onset |
| TaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | 15 GPa | zero_resistance |
| TaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | 1.5 GPa | onset |
| TaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | 5 GPa | zero_resistance |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.8 | 15 GPa | onset |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.6 | 15 GPa | zero_resistance |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.9 | 15 GPa | onset |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.9 | 15 GPa | zero_resistance |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.3 | 15 GPa | onset |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.6 | 15 GPa | zero_resistance |
| TaS1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.6 | Pressure unresolved | unknown |
| TiSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure not reported | unknown |
| CuxTiSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | onset |
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