https://journals.aps.org/prb/accepted/7f071O67U75E2913141158d9f3e6346d63d18fce1

Physical Review B - Accepted Paper: Magnetic fluctuations in Pb${}_{9}$Cu(PO${}_{4}$)${}_{6}$OPhysical Review B - Accepted Paper: Magnetic fluctuations in Pb${}_{9}$Cu(PO${}_{4}$)${}_{6}$Ojournals.aps.org

The hope that copper doped lead apatite {} is a room-temperature superconductor has largely been dashed by global research efforts. Nevertheless, according to the current state of knowledge, the material has interesting magnetic properties, and research groups around the world have prepared high quality samples. We use a fluctuation exchange approximation (FLEX) approach to study the magnetic tendencies in {}. We find ferromagnetic fluctuations very close to the filling of the stoichiometric compound which can be understood from Fermi surface nesting at the M point. This is similar to the one-band triangular lattice Hamiltonian at three-quarter filling. Interestingly, the special kz dependence of the {} band structure makes it very sensitive to doping. Only slight charge doping switches between antiferromagnetic and ferromagnetic fluctuations. If the material could become superconducting, it might be easily switchable between singlet and triplet superconductivity.


[부정] 8월 24일, 시미즈 마코토(Shimizu Makoto) 일본 교토대 연구원이 원고를 냈다. 원고 제안된 구조체는 여러 단점이 있다고 보아, 개선될 방향을 제시했다.