Thus, PEG-ceramide nanomicelles could serve as an effective and safe therapeutic drug carrier to deliver SAL into liver cancer, opening up the avenue of using PEG-ceramide as therapeutic drug carriers.
Understanding the competition between superconductivity and other ordered states (such as antiferromagnetic or charge-density-wave (CDW) state) is a central issue in condensed matter physics. The recently discovered layered kagome metal AV3Sb5 (A = K, Rb, and Cs) provides us a new playground to study the interplay of superconductivity and CDW state by involving nontrivial topology of band structures. Here, we present high-pressure electrical transport measurements for CsV3Sb5 with the highest Tc of 2.7 K in AV3Sb5 family. The CDW transition is monotonically suppressed by pressure, while superconductivity is enhanced with increasing pressure up to P1 ≈0.7 GPa, then an unexpected suppression on superconductivity happens until pressure around 1.2 GPa. The CDW is completely suppressed at a critical pressure P2≈2 GPa together with a maximum Tc of about 8 K. In contrast to a common dome-like behavior, the pressure-dependent Tc shows an unexpected double-peak behavior. The unusual suppression of Tc at P1 is linked to a Lifshitz transition of Fermi surface evidenced by quantum oscillation experiment, a sudden enhancement of the residual resistivity and a rapid decrease of magnetoresistance. A possible nearly commensurate CDW state involving the formation of CDW domain wall has been used to account for the Lifshitz transition. Our discoveries indicate an unusual competition between superconductivity and CDW state in pressurized kagome lattice.
Controlling the anomalous Hall effect (AHE) inspires potential applications of quantum materials in the next generation of electronics. The recently discovered quasi-2D kagome superconductor CsV3Sb5 exhibits large AHE accompanying with the charge-density-wave (CDW) order which provides us an ideal platform to study the interplay among nontrivial band topology, CDW, and unconventional superconductivity. Here, we systematically investigated the pressure effect of the AHE in CsV3Sb5. Our high-pressure transport measurements confirm the concurrence of AHE and CDW in the compressed CsV3Sb5. Remarkably, distinct from the negative AHE at ambient pressure, a positive anomalous Hall resistivity sets in below 35 K with pressure around 0.75 GPa, which can be attributed to the Fermi surface reconstruction and/or Fermi energy shift in the new CDW phase under pressure. Our work indicates that the anomalous Hall effect in CsV3Sb5 is tunable and highly related to the band structure.
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