Naslov
Magnetoconductivity of a Metal with a Closed Fermi Surface Reconstructed by a Biaxial Charge Density Wave

Autori
Radić, Danko ; Keran, Barbara ; Kadigrobov, Anatoly

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
From Solid State to Biophysics X

Mjesto i datum
Cavtat, Hrvatska, 11-18.06.2022

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
charge density waves ; topological reconstruction of the Fermi surface ; magnetocondctivity ; Hall coefficient ; magnetic breakdown

Sažetak
We investigate quantum dynamics and kinetics of a 2D conductor with a closed Fermi surface reconstructed by a biaxial density wave, in which electrons move along a two-dimensional periodic net of semiclassical trajectories coupled by the magnetic breakdown tunneling under a strong magnetic field [1, 2]. We derive a quasiparticle dispersion law and magnetoconductivity tensor. The quasiparticle spectrum is found to be the alternating series of two-dimensional magnetic energy bands with gaps between them. The longitudinal magnetoconductivity shows giant oscillations with change of magnetic field, while the Hall coefficient changes sign and is absent in a wide range of the magnetic fields in between.[3] Preliminary estimations show that the suggested magnetoconductivity mechanism may be the origin of such behavior of the Hall coefficient versus magnetic field, as observed in experiments in materials with analogous topology of the Fermi surface, such as the high-Tc superconducting cuprates.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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