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	Discovery of Lorentz-violating type II Weyl fermions in LaAlGe Su-Yang Xu , Nasser Alidoust , Guoqing Chang , Hong Lu , Bahadur Singh , Ilya Belopolski , Daniel S. Sanchez , Xiao Zhang , Guang Bian , Hao Zheng , Marious-Adrian Husanu , Yi Bian , Shin-Ming Huang , Chuang-Han Hsu , Tay-Rong Chang , Horng-Tay Jeng , Arun Bansil , Titus Neupert , Vladimir N. Strocov , Hsin Lin , Shuang Jia , M. Zahid Hasan Science Advances 3 DOI: 10.1126/sciadv.1603266 Open Access Show Abstract ▼ Abstract: In quantum field theory, Weyl fermions are relativistic particles that travel at the speed of light and strictly obey the celebrated Lorentz symmetry. Their low-energy condensed matter analogs are Weyl semimetals, which are conductors whose electronic excitations mimic the Weyl fermion equation of motion. Although the traditional (type I) emergent Weyl fermions observed in TaAs still approximately respect Lorentz symmetry, recently, the so-called type II Weyl semimetal has been proposed, where the emergent Weyl quasiparticles break the Lorentz symmetry so strongly that they cannot be smoothly connected to Lorentz symmetric Weyl particles. Despite some evidence of nontrivial surface states, the direct observation of the type II bulk Weyl fermions remains elusive. We present the direct observation of the type II Weyl fermions in crystalline solid lanthanum aluminum germanide (LaAlGe) based on our photoemission data alone, without reliance on band structure calculations. Moreover, our systematic data agree with the theoretical calculations, providing further support on our experimental results.	Jun 2017

Instruments / Technical Area

Publication Details

Published

Actions

I05-ARPES

Discovery of Lorentz-violating type II Weyl fermions in LaAlGe