Large magnetoresistance and Fermi surface topology of PrSb

Abstract

We report magnetotransport measurements of PrSb in high magnetic fields. Our results show that PrSb exhibits extremely large magnetoresistance(XMR) at low temperatures. Meanwhile angledependent magnetoresistance measurements were used to probe the Fermi surface via Shubnikov-de Haas (SdH) oscillations. The angular dependence of the frequencies of the α-branch indicate a two-dimensional character for this Fermi surface sheet, while the effective mass of this branch as a function of angle shows a four-fold signature. The evolution of the Fermi surface with field was also studied up to 32 T. An enlargement of the Fermi surface up to 14 T is observed, before the oscillation frequencies become constant at higher fields. Meanwhile our analysis of the residual Landau index from the high field data reveals a zero Berry phase and therefore trivial topology of the Fermi surface. PACS number(s):

Magnetoresistance in LuBi and YBi semimetals due to nearly perfect carrier compensation

“…(with B 1 = 7 T and B 2 = 9 T), and the constant λ = 2π 2 k B m 0 /e (≈ 14.7 T/K), we obtained m * = 0.22 m 0 for both compounds. This value of effective mass is close to those reported previously for other rare-earth-metal monopnictides3,20,21,34,42,48 and also to effective masses m * calc α = 0.24 m 0 and 0.29 m 0 , obtained from our electronic structure calculations for YBi and LuBi, respectively.…”

Magnetotransport and electronic structure of the antiferromagnetic semimetal YbAs

“…Searching for correlated and magnetic materials with topologically non-trivial electronic structures has recently led to the discovery of novel topological phases, such as topological Kondo insulators [1,2], magnetic topological insulators [3][4][5][6], magnetic Weyl semimetals [7][8][9][10] and Weyl-Kondo semimetals [11,12]. The LnX series crystallizing in the cubic NaCl-type structure [13](Ln = rare-earth and X = As, Sb or Bi) is a large family of semimetals where topologically nontrivial band structures have been found to exist with electronic correlations and magnetism [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. For example, evidence was found that CeSb hosts Weyl fermions in the fieldinduced ferromagnetic state [14], while NdSb was reported to be a Dirac semimetal with antiferromagnetic (AFM) order [25][26][27].…”

Multiple metamagnetism, extreme magnetoresistance and nontrivial topological electronic structures in the magnetic semimetal candidate holmium monobismuthide

“…The extreme magnetoresistance has been widely reported in the classic elemental semimetal Bi, topological semimetals WTe 2 , Cd 3 As 2 , TaPn (Pn = As, Sb) family, pyrite-type PtBi 2 , RPtBi (R=Nd, Gd), RPn (R=rare earth; Pn = Sb, Bi) and so on . Ever since the unprecedentedly large magnetoresistance is revealed in LaSb, the research enthusiasm on rare earth monopnictides RPn (R=rare earth, Pn = Sb, Bi) is inspired [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. The family has been widely studied in the 1980-90s for its heavy-fermion nature [31].…”

“…Intriguingly, the recent calculations predict that LaPn (Pn = N, P, As, Sb, and Bi) could be a topological prototype material with band inversion at X point of the bulk fcc Brillouin zone [32]. Afterwards, further investigation on this family has been systematically performed [17][18][19][20][21][22][23][24][25][26][27][28][29][30]. It is found that some members of this family have topologically nontrivial band structures.…”