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
I05-ARPES	A charge-density-wave topological semimetal Wujun Shi , Benjamin J. Wieder , Holger L. Meyerheim , Yan Sun , Yang Zhang , Yiwei Li , Lei Shen , Yanpeng Qi , Lexian Yang , Jagannath Jena , Peter Werner , Klaus Koepernik , Stuart Parkin , Yulin Chen , Claudia Felser , B. Andrei Bernevig , Zhijun Wang Nature Physics 83 DOI: 10.1038/s41567-020-01104-z Show Abstract ▼ Abstract: Topological physics and strong electron–electron correlations in quantum materials are typically studied independently. However, there have been rapid recent developments in quantum materials in which topological phase transitions emerge when the single-particle band structure is modified by strong interactions. Here we demonstrate that the room-temperature phase of (TaSe4)2I is a Weyl semimetal with 24 pairs of Weyl nodes. Owing to its quasi-one-dimensional structure, (TaSe4)2I also hosts an established charge-density wave instability just below room temperature. We show that the charge-density wave in (TaSe4)2I couples the bulk Weyl points and opens a bandgap. The correlation-driven topological phase transition in (TaSe4)2I provides a route towards observing condensed-matter realizations of axion electrodynamics in the gapped regime, topological chiral response effects in the semimetallic phase, and represents an avenue for exploring the interplay of correlations and topology in a solid-state material.	Jan 2021
I16-Materials and Magnetism	Colossal magnetoresistance in a nonsymmorphic antiferromagnetic insulator Priscila Rosa , Yuanfeng Xu , Marein Rahn , Jean Souza , Satya Kushwaha , Larissa Veiga , Alessandro Bombardi , Sean Thomas , Marc Janoschek , Eric Bauer , Mun Chan , Zhijun Wang , Joe Thompson , Neil Harrison , Pascoal Pagliuso , Andrei Bernevig , Filip Ronning Npj Quantum Materials 5 DOI: 10.1038/s41535-020-00256-8 Diamond Proposal Number(s): [18991] Open Access Show Abstract ▼ Abstract: Here we investigate antiferromagnetic Eu5In2Sb6, a nonsymmorphic Zintl phase. Our electrical transport data show that Eu5In2Sb6 is remarkably insulating and exhibits an exceptionally large negative magnetoresistance, which is consistent with the presence of magnetic polarons. From ab initio calculations, the paramagnetic state of Eu5In2Sb6 is a topologically nontrivial semimetal within the generalized gradient approximation (GGA), whereas an insulating state with trivial topological indices is obtained using a modified Becke−Johnson potential. Notably, GGA + U calculations suggest that the antiferromagnetic phase of Eu5In2Sb6 may host an axion insulating state. Our results provide important feedback for theories of topological classification and highlight the potential of realizing clean magnetic narrow-gap semiconductors in Zintl materials.	Jul 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