Details

Autor(en) / Beteiligte

• Zeng, L-K
• Lou, R
• Wu, D-S
• Xu, Q N
• Guo, P-J
• Kong, L-Y
• Zhong, Y-G
• Ma, J-Z
• Fu, B-B
• Richard, P
• Wang, P
• Liu, G T
• Lu, L
• Huang, Y-B
• Fang, C
• Sun, S-S
• Wang, Q
• Wang, L
• Shi, Y-G
• Weng, H M
• Lei, H-C
• Liu, K
• Wang, S-C
• Qian, T
• Luo, J-L
• Ding, H

Titel

Compensated Semimetal LaSb with Unsaturated Magnetoresistance

Ist Teil von

• Physical review letters, 2016-09, Vol.117 (12), p.127204-127204, Article 127204

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• By combining angle-resolved photoemission spectroscopy and quantum oscillation measurements, we performed a comprehensive investigation on the electronic structure of LaSb, which exhibits near-quadratic extremely large magnetoresistance (XMR) without any sign of saturation at magnetic fields as high as 40 T. We clearly resolve one spherical and one intersecting-ellipsoidal hole Fermi surfaces (FSs) at the Brillouin zone (BZ) center Γ and one ellipsoidal electron FS at the BZ boundary X. The hole and electron carriers calculated from the enclosed FS volumes are perfectly compensated, and the carrier compensation is unaffected by temperature. We further reveal that LaSb is topologically trivial but shares many similarities with the Weyl semimetal TaAs family in the bulk electronic structure. Based on these results, we have examined the mechanisms that have been proposed so far to explain the near-quadratic XMR in semimetals.