Department of Physics, New York University, New York 10003, USA.
National High Magnetic Field Lab, Florida State University, Tallahassee 32310, USA.
Phys Rev Lett. 2014 Apr 11;112(14):146402. doi: 10.1103/PhysRevLett.112.146402. Epub 2014 Apr 8.
We present simultaneous measurements of angular-dependent magnetoresistance and thermopower along all three crystal axes in (TMTSF)2PF6 for pressures to 7.4 kbar and magnetic fields to 35 T. (TMTSF)2PF6 under pressure shows the coexistence of spin density wave and metal-superconducting orders. We suggest that this coexistence results neither in microscopic coexistence nor in a new soliton wall phase, contrary to previous suggestions, but in phase separation into domains of the high-pressure metal and the low-pressure spin density wave phases. Simultaneous measurement of transport along all crystal axes allows us to unambiguously describe the domain structure, whereas the superconducting transition temperature and four independent Fermi surface-sensitive magnetoresistance signatures allow us to unambiguously characterize the coexisting metallic domains.
我们在 7.4 kbar 的压力和 35 T 的磁场下，对 (TMTSF)2PF6 的所有三个晶体轴上的角相关磁阻和热功率进行了同时测量。在压力下，(TMTSF)2PF6 表现出自旋密度波和金属超导序的共存。我们认为，这种共存既不是微观共存，也不是新的孤子壁相，与之前的建议相反，而是分为高压金属相和低压自旋密度波相的相分离。沿着所有晶体轴的同时测量允许我们明确地描述畴结构，而超导转变温度和四个独立的费米面敏感磁阻特征允许我们明确地描述共存的金属畴。
