Band structure and transport studies on PdAl2Cl8-intercalated graphite

TL;DR

This study investigates the electronic structure and transport properties of PdAl2Cl8-intercalated graphite, revealing a strongly two-dimensional Fermi surface and providing key parameters of its band structure through quantum oscillation measurements.

Contribution

It provides the first detailed analysis of the 2D Fermi surface in PdAl2Cl8-intercalated graphite using SdH effect, confirming its 2D nature and extracting fundamental electronic parameters.

Findings

Confirmed strongly 2D Fermi surface via angular SdH measurements

Determined key band parameters: gamma_0=2.7 eV, E_F=-1.1 eV, n_SdH=1.1x10^27 m^-3

Supported the 2D band structure model for this intercalation compound

Abstract

The 2D Fermi surface of 1st stage PdAl2Cl8 acceptor-type graphite intercalation compounds (GICs) has been investigated using the Shubnikov-de Haas (SdH) effect. One fundamental frequency is observed, the angular variation of which confirms its strongly 2D nature, as previously found through electrical conductivity measurements. The energy spectrum can be described by the 2D band structure model proposed by Blinowski et al. We obtain the following parameter values: intraplane C-C interaction energy gamma_0 = 2.7 eV, Fermi energy E_F = -1.1 eV and carrier density n_SdH= 1.1x10^27 m^-3. Some fewer details are presented on stage 2 and 3 materials.