Diamond Publications - Search Results

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

One item found (0 items not approved).

Instruments / Technical Area	Publication Details	Published	Actions
I05-ARPES	Tailoring the nature and strength of electron–phonon interactions in the SrTiO3(001) 2D electron liquid Z. Wang , S. Mckeown Walker , A. Tamai , Y. Wang , Z. Ristic , F. Bruno , A. De La Torre , S. Ricco , N. C. Plumb , M. Shi , P. Hlawenka , J. Sánchez-Barriga , A. Varykhalov , Timur Kim , Moritz Hoesch , P. D. C. King , Worawat Meevasana , U. Diebold , J. Mesot , B. Moritz , T. P. Devereaux , M. Radovic , F. Baumberger Nature Materials DOI: 10.1038/nmat4623 Diamond Proposal Number(s): [11741] Show Abstract ▼ Abstract: Surfaces and interfaces offer new possibilities for tailoring the many-body interactions that dominate the electrical and thermal properties of transition metal oxides1, 2, 3, 4. Here, we use the prototypical two-dimensional electron liquid (2DEL) at the SrTiO3(001) surface5, 6, 7 to reveal a remarkably complex evolution of electron–phonon coupling with the tunable carrier density of this system. At low density, where superconductivity is found in the analogous 2DEL at the LaAlO3/SrTiO3 interface8, 9, 10, 11, 12, 13, our angle-resolved photoemission data show replica bands separated by 100 meV from the main bands. This is a hallmark of a coherent polaronic liquid and implies long-range coupling to a single longitudinal optical phonon branch. In the overdoped regime the preferential coupling to this branch decreases and the 2DEL undergoes a crossover to a more conventional metallic state with weaker short-range electron–phonon interaction. These results place constraints on the theoretical description of superconductivity and allow a unified understanding of the transport properties in SrTiO3-based 2DELs.	Apr 2016

Instruments / Technical Area

Publication Details

Published

Actions

I05-ARPES

Tailoring the nature and strength of electron–phonon interactions in the SrTiO3(001) 2D electron liquid