This is the latest in a series of posts cataloguing how there are wide range of strongly correlated metals which exhibit magnetoresistance which is qualitatively different from the semi-classical orbital magnetoresistance seen in most metals due to the Lorentz force. For the latter the magnetoresistance is maximal (zero) for the current and magnetic field perpendicular (parallel) to each other.
The data above is taken from a paper reporting measurements on the quasi-one-dimensional metal Li0.9Mo6O17, which also exhibits other non-Fermi liquid properties.
The graph shows the magnetic field dependence (in Teslan) of the relative change in the interlayer resistance with the field and current parallel to one another. The different curves correspond to different temperatures, increasing from 3 K to 50 K, from top to bottom.
Subscribe to:
Post Comments (Atom)
Emergence and protein folding
Proteins are a distinct state of matter. Globular proteins are tightly packed with a density comparable to a crystal but without the spatia...
-
Is it something to do with breakdown of the Born-Oppenheimer approximation? In molecular spectroscopy you occasionally hear this term thro...
-
If you look on the arXiv and in Nature journals there is a continuing stream of people claiming to observe superconductivity in some new mat...
-
I welcome discussion on this point. I don't think it is as sensitive or as important a topic as the author order on papers. With rega...
What are the ways to get positive MR with a parallel field? Here's what comes to my mind:
ReplyDelete1) Disruption of antilocalization
2) Change in the density of states from band splitting
3) Magnetic ordering
4) In 2D systems, the magnetic confinement can reduce surface scattering
5) By breaking a superconducting state
6) ...
What else?
Are there common frameworks within which to think about the causes of positive magnetoresistance? Or do you just construct a list of effects, like I naively did?