PMID- 32947280
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220117
IS  - 1361-648X (Electronic)
IS  - 0953-8984 (Linking)
VI  - 33
IP  - 4
DP  - 2020 Oct 28
TI  - Anomalous Hall transport in tilted multi-Weyl semimetals.
LID - 10.1088/1361-648X/abb9b8 [doi]
AB  - We study the effect of a perpendicular magnetic fieldBon a multinode Weyl 
      semimetal (mWSM) of arbitrary integer monopole chargen, with the two Weyl 
      multinodes separated ink-space. Besides type-I mWSMs, there exist type-II mWSMs 
      which are characterized by the tilted minimal dispersion for low-energy 
      excitations; the Weyl points in type-II mWSMs are still protected crossings but 
      appear at the contact of the electron and hole pockets, after the Lifshitz 
      transition. We find that the presence of a perpendicular magnetic field quantizes 
      the occupation pockets due to the presence of Fermi tubes. In this theory, the 
      Hilbert space is spanned by a set ofnchiral degenerate ground states, and a 
      countably infinite number of particle-hole symmetric Landau levels (LLs). We 
      calculate the Hall conductivity for the tilt-symmetric case of type-I mWSM using 
      the Kubo formula, in the zero-frequency (DC) limit, and recover the well-known 
      vacuum contribution. We compute the Fermi surface corrections and show that the 
      expression generalizes from the formula for elementary (n= 1) type-I WSMs. We 
      derive an expression for the type-II mWSM Hall conductivity, which is bounded by 
      a LL cutoff introduced on physical grounds. Interestingly, we find that the 
      anomalous vacuum Hall conductivity is vanishing in the type-II phase at all 
      temperatures. The corresponding thermal Hall and Nernst conductivities are 
      evaluated and characterized for both phases. The qualitative and quantitative 
      observations presented here may serve in the characterization of generic mWSMs of 
      both types.
CI  - (c) 2020 IOP Publishing Ltd.
FAU - Menon, Anirudha
AU  - Menon A
AUID- ORCID: 0000-0001-8870-6451
AD  - Department of Physics, University of California, Davis, California 95616, United 
      States of America.
FAU - Basu, Banasri
AU  - Basu B
AD  - Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata 
      700108, India.
LA  - eng
PT  - Journal Article
DEP - 20201028
PL  - England
TA  - J Phys Condens Matter
JT  - Journal of physics. Condensed matter : an Institute of Physics journal
JID - 101165248
SB  - IM
OTO - NOTNLM
OT  - Hall physics
OT  - Weyl fermions
OT  - correlated electrons
OT  - topological materials
OT  - transport
EDAT- 2020/09/19 06:00
MHDA- 2020/09/19 06:01
CRDT- 2020/09/18 20:24
PHST- 2020/07/10 00:00 [received]
PHST- 2020/09/18 00:00 [accepted]
PHST- 2020/09/19 06:00 [pubmed]
PHST- 2020/09/19 06:01 [medline]
PHST- 2020/09/18 20:24 [entrez]
AID - 10.1088/1361-648X/abb9b8 [doi]
PST - epublish
SO  - J Phys Condens Matter. 2020 Oct 28;33(4). doi: 10.1088/1361-648X/abb9b8.