Extremely high conductivity observed in the triple point topological metal MoP

Nitesh Kumar, Yan Sun, Michael Nicklas, Sarah J. Watzman, Olga Young, Inge Leermakers, Jacob Hornung, Johannes Klotz, Johannes Gooth, Kaustuv Manna, Vicky Suess, Satya N. Guin, Tobias Foerster, Marcus Schmidt, Lukas Muechler, Binghai Yan, Peter Werner, Walter Schnelle, Uli Zeitler, Jochen WosnitzaStuart S. P. Parkin, Claudia Felser, Chandra Shekhar

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

Weyl and Dirac fermions have created much attention in condensed matter physics and materials science. Recently, several additional distinct types of fermions have been predicted. Here, we report ultra-high electrical conductivity in MoP at low temperature, which has recently been established as a triple point fermion material. We show that the electrical resistivity is 6 n Omega cm at 2 K with a large mean free path of 11 microns. de Haas-van Alphen oscillations reveal spin splitting of the Fermi surfaces. In contrast to noble metals with similar conductivity and number of carriers, the magnetoresistance in MoP does not saturate up to 9 T at 2 K. Interestingly, the momentum relaxing time of the electrons is found to be more than 15 times larger than the quantum coherence time. This difference between the scattering scales shows that momentum conserving scattering dominates in MoP at low temperatures.

اللغة الأصليةالإنجليزيّة
رقم المقال2475
عدد الصفحات7
دوريةNature Communications
مستوى الصوت10
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 6 يونيو 2019

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