Search Results

You searched for all publications:

with publication states 'Published (Approved)'

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.

Exact matches
Related results

2 items found (0 items not approved), displaying all items.1

Instruments / Technical Area	Publication Details	Published	Actions
I16-Materials and Magnetism	Structural involvement in the melting of the charge density wave in 1T - TiSe2 Max Burian , Michael Porer , Jose R. L. Mardegan , Vincent Esposito , Sergii Parchenko , Bulat Burganov , Namrata Gurung , Mahesh Ramakrishnan , Valerio Scagnoli , Hiroki Ueda , Sonia Francoual , Federica Fabrizi , Yoshikazu Tanaka , Tadashi Togashi , Yuya Kubota , Makina Yabashi , Kai Rossnagel , Steven L. Johnson , Urs Staub Physical Review Research 3 DOI: 10.1103/PhysRevResearch.3.013128 Diamond Proposal Number(s): [15742] Open Access Show Abstract ▼ Abstract: In this work, we use ultrafast pump-probe nonresonant and resonant x-ray diffraction to track the periodic lattice distortion and the electronic charge density wave in 1 T − TiSe 2 upon optical excitation. We observe a fluence regime in which the periodic lattice deformation is strongly suppressed but the charge density wave related Se 4 p orbital order remains mostly intact. Complete melting of both structural and electronic order occurs four to five times faster than expected from a purely electronic charge-screening process, strongly suggesting a structurally assisted weakening of excitonic correlations. Our experimental data provide insight on the intricate coupling between structural and electronic order in stabilizing the periodic-lattice-distortion/charge-density-wave state in 1 T − TiSe 2 . The results further show that electron-phonon coupling can lead to different, energy dependent phase-transition pathways in condensed matter systems, opening different possibilities in the conception of nonequilibrium phenomena at the ultrafast scale.	Feb 2021
I16-Materials and Magnetism	Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y3Fe5O12 and inverted Y3Fe5O12/Pt bilayers Stephan Geprags , Christoph Klewe , Sibylle Meyer , Dominik Graulich , Felix Schade , Marc Schneider , Sonia Francoual , Stephen P. Collins , Katharina Ollefs , Fabrice Wilhelm , Andrei Rogalev , Yves Joly , Sebastian T. B. Goennenwein , Matthias Opel , Timo Kuschel , Rudolf Gross Physical Review B 102 DOI: 10.1103/PhysRevB.102.214438 Diamond Proposal Number(s): [12772] Show Abstract ▼ Abstract: The magnetic state of heavy metal Pt thin films in proximity to the ferrimagnetic insulator Y 3 Fe 5 O 12 has been investigated systematically by means of x-ray magnetic circular dichroism and x-ray resonant magnetic reflectivity measurements combined with angle-dependent magnetotransport studies. To reveal intermixing effects as the possible cause for induced magnetic moments in Pt, we compare thin film heterostructures with different orders of the layer stacking and different interface properties. For standard Pt layers on Y 3 Fe 5 O 12 thin films, we do not detect any static magnetic polarization in Pt. These samples show an angle-dependent magnetoresistance behavior, which is consistent with the established spin Hall magnetoresistance. In contrast, for the inverted layer sequence, Y 3 Fe 5 O 12 thin films grown on Pt layers, Pt displays a finite induced magnetic moment comparable to that of all-metallic Pt/Fe bilayers. This magnetic moment is found to originate from finite intermixing at the Y 3 Fe 5 O 12 / Pt interface. As a consequence, we found a complex angle-dependent magnetoresistance indicating a superposition of the spin Hall and the anisotropic magnetoresistance in these types of samples. Both effects can be disentangled from each other due to their different angle dependence and their characteristic temperature evolution.	Dec 2020

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User