Research in the Gweon Group
| Differences between revisions 5 and 6 | Back to page |
|
Size: 688
Comment:
|
Size: 1064
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 3: | Line 3: |
| <<fl(T)>>he density of states is a basic quantity that students learn, when they learn how to describe free electrons in a solid. As the name suggests, it says how many electrons the material can accomodate at a certain energy value. | L<<fl(T)>>he density of states (DOS) is a basic quantity, e.g., for describing free electrons in a solid. As the name suggests, it says how many electrons the material can accomodate at a certain energy value. |
| Line 5: | Line 5: |
| In a strongly correlated electron system such as high temperature superconductors, the equivalent quantity is the ''many body'' density of states, $\int d\vec k A(\vec k, \omega)$, where $A$ is the single particle spectral function, measured by ARPES. | In a strongly correlated electron system such as high temperature superconductors, the equivalent quantity is the ''many body'' density of states (MBDOS), $\int d\vec k A(\vec k, \omega)$, where $A$ is the single particle spectral function, measured by ARPES. Even when the DOS is predicted to be finite at the Fermi energy (“band metal”), strong correlation can lead to a vanishing MBDOS (“Mott-Hubbard insulator”). A very important question that has been very tough to answer so far is “does the Mott insulator physics have a distinctive signature in near the optimally doped high temperature superconductor?” |
| Line 10: | Line 12: |
| * [[pECFL|Phenomenological ECFL]] | |
| Line 11: | Line 14: |
| * [[pECFL|Phenomenological ECFL]] |
Anomalous nodal many body density of states
LThe density of states (DOS) is a basic quantity, e.g., for describing free electrons in a solid. As the name suggests, it says how many electrons the material can accomodate at a certain energy value.
In a strongly correlated electron system such as high temperature superconductors, the equivalent quantity is the many body density of states (MBDOS), $\int d\vec k A(\vec k, \omega)$, where $A$ is the single particle spectral function, measured by ARPES. Even when the DOS is predicted to be finite at the Fermi energy (“band metal”), strong correlation can lead to a vanishing MBDOS (“Mott-Hubbard insulator”).
A very important question that has been very tough to answer so far is “does the Mott insulator physics have a distinctive signature in near the optimally doped high temperature superconductor?”