Linear nonsaturating magnetoresistance in the Nowotny chimney ladder compound Ru2Sn3

We present magnetoresistivity measurements in high-quality single crystals of the Nowotny chimney ladder compound Ru2Sn3. We find a linear and nonsaturating magnetoresistance up to 20 T. The magnetoresistance changes with the magnetic field orientation at small magnetic fields, from a positive to a negative curvature. Above 5 T, the magnetoresistance shows no sign of saturation up to 20 T for any measured angle. The shape of the anisotropy in the magnetoresistance remains when increasing temperature and Kohler's rule is obeyed. We associate the linear and nonsaturating magnetoresistance to a small Fermi surface with hot spots, possibly formed as a consequence of the structural transition. We discuss the relevance of electron-electron interactions under magnetic fields and aspects of the topologically nontrivial properties expected in Ru2Sn3This work was supported by the Spanish Research State Agency (FIS2017-84330-R, CEX2018-000805-M, RYC2014-15093, MAT2017-87134-C2-2-R), by the Comunidad de Madrid through the program NANOMAGCOST-CM (Grant No. S2018/NMT-4321) and by the European Research Council PNICTEYES project through Grant Agreement No 67908