Details

Autor(en) / Beteiligte

• Blawat, Joanna
• Speer, Smita
• Singleton, John
• Xie, Weiwei
• Jin, Rongying

Titel

Quantum-limit phenomena and band structure in the magnetic topological semimetal EuZn2As2

Ist Teil von

• Communications physics, 2023-09, Vol.6 (1), p.255-7, Article 255

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Abstract The interplay between magnetism and electronic topology in the quantum limit is a forefront subject of condensed matter physics. Here, we show the electronic and magnetic properties of layered antiferromagnet EuZn 2 As 2 in pulsed magnetic fields up to 60 T and temperatures down to 0.6 K. By analyzing the quantum oscillations observed in the magnetoresistance (MR) and proximity detector oscillator (PDO) frequency, we find that (1) the oscillation frequency F  = 46 ± 6 T for H // c and 42 ± 2 T for H // ab ; (2) the corresponding Berry phase is close to π for H // c , implying a nontrivial topology; and (3) the large linear MR occurs beyond the first Landau level, without any sign of saturation. From these observations, we conclude that the linear MR can be understood by considering diffusing cyclotron centers due to compressed Landau wavefunction, an emergent behavior in the quantum limit.