Density wave and topological reconstruction of an isotropic two-dimensional electron band in external magnetic field

Znanstveni rad - Izvorni znanstveni rad

• Autor: Anatoly M. Kadigrobov
• Autor: Danko Radić
• Autor: Aleksa Bjeliš
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

We predict a mechanism of spontaneous stabilization of a uniaxial density wave in a two-dimensional metal with an isotropic Fermi surface in the presence of external magnetic field. The topological transformation of a closed Fermi surface into an open one decreases the electron band energy due to delocalization of electrons initially localized by magnetic field, additionally affected by the magnetic breakdown effect. The driving mechanism of such reconstruction is a periodic potential due to the self-consistently formed electron density wave. It is accompanied with quantum oscillations periodic in inverse magnetic field, similar to the standard de Haas-van Alphen effect, due to Landau-level filling. The phase transition appears as a quantum one at T = 0, provided the relevant coupling constant is above the critical one. This critical value rapidly decreases, and finally saturates toward zero on the scale of tens of Tesla. Thus, a strong enough magnetic field can induce the density wave in the system in which it was absent in zero field.

• Ključne riječi (engleski): Charge density waves; charge order; density of states; Peierls transition; quantum criticality
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review B
• Brojčani podaci: vol. 100, br. 11, 115108
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.100.115108
• URN:NBN: urn:nbn:hr:217:602860
• Datum objave publikacije: 2019
• Projekt: Šifra: IP-2016-06-2289; Naziv (hrvatski): Kolektivni efekti, tunelirajući i topološki transport u novim nanospojevima; Kratica: C3TiNN; Voditelj: Danko Radić; Pravna nadležnost: Hrvatska; Financijer: HRZZ; Linija financiranja: IP
• URL dokumenta: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.115108
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2019 American Physical Society. Received 3 July 2019; published 3 September 2019.
• Datum i vrijeme pohrane: 2020-08-20 17:30:12