Lee I J, Brown S E, Yu W, Naughton M J, Chaikin P M
Department of Physics, Princeton University, New Jersey 08544, USA.
Phys Rev Lett. 2005 May 20;94(19):197001. doi: 10.1103/PhysRevLett.94.197001. Epub 2005 May 16.
We report simultaneous NMR and electrical transport experiments in the pressure range near the boundary of the antiferromagnetic spin density wave (SDW) insulator and the metallic/superconducting (SC) phase in (TMTSF)2PF6. Measurements indicate a tricritical point separating a line of second-order SDW/metal transitions from a line of first-order SDW/metal(SC) transitions with coexistence of macroscopic regions of SDW and metal(SC) order, with little mutual interaction but strong hysteretic effects. NMR results quantify the fraction of each phase.
我们报告了在(TMTSF)₂PF₆中反铁磁自旋密度波(SDW)绝缘体与金属/超导(SC)相边界附近压力范围内的同步核磁共振(NMR)和电输运实验。测量结果表明，存在一个三临界点，该点将二阶SDW/金属转变线与一阶SDW/金属(SC)转变线分开，其中SDW和金属(SC)有序的宏观区域共存，相互作用很小，但具有强烈的滞后效应。核磁共振结果量化了每个相的比例。
