Angle-dependent magnetoresistance as a sensitive probe of the charge density wave in quasi-one-dimensional semimetal Ta2NiSe7
- Shanghai Jiao Tong Univ. (China)
- Tulane Univ., New Orleans, LA (United States)
- Tulane Univ., New Orleans, LA (United States); Pennsylvania State Univ., University Park, PA (United States)
- Shanghai Jiao Tong Univ. (China); Pennsylvania State Univ., University Park, PA (United States)
The behavior of charge density waves (CDWs) in an external magnetic field is dictated by both orbital and Pauli (Zeeman) effects. A quasi-one-dimensional (Q1D) system features Q1D Fermi surfaces that allow these effects to be distinguished, which in turn can provide a sensitive probe to the underlying electronic states. Furthermore, we studied the field dependence of an incommensurate CDW in a transition-metal chalcogenide Ta2NiSe7 with a Q1D chain structure. The angle-dependent magnetoresistance (MR) is found to be very sensitive to the relative orientation between the magnetic field and the chain direction. With an applied current fixed along the b axis (the chain direction), the angle-dependent MR shows a striking change of the symmetry below TCDW only for a rotating magnetic field in the ac plane. In contrast, the symmetry axis remains unchanged for other configurations (H in ab and bc planes). The orbital effect conforms to the lattice symmetry, while the Pauli effect in the form of μBB/ℏvF can be responsible for such symmetry change, provided that the Fermi velocity vF is significantly anisotropic and the nesting vector changes in a magnetic field, which is corroborated by our first-principles calculations. Our results show that the angle-dependent MR is a sensitive transport probe of CDW and can be useful for the study of low-dimensional systems in general.
- Research Organization:
- Tulane Univ., New Orleans, LA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC): NSF
- Grant/Contract Number:
- SC0014208; EFMA1433378; 11804220; 91421304; 11574197; 11474198
- OSTI ID:
- 1612108
- Journal Information:
- Applied Physics Letters, Vol. 113, Issue 19; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Charge-density-wave formation in Ta[sub 2]NiSe[sub 7] studied by scanning tunneling microscopy
Millimetre-wave measurements of the bulk magnetoconductivity of anisotropic metals : application to the organic superconductors {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2} and {Beta}"-(BEDT-TTF){sub 2}SF{sub 5}CH{sub 2}SO{sub 3} (BEDT-TTF = Bis(ethylenedithio)tetrathiafulvalene.