Observation of three-dimensional fermi surfaces in a single-component molecular metal, [Ni(tmdt)2].
Rigorous evidence of metallicity of a molecular crystal consisting of single-component neutral molecules is disclosed by observing the Fermi surface through magnetic quantum oscillations. Torque magnetometry measurements of de Haas-van Alphen oscillatory signals in a single crystal of [Ni(tmdt)2] molecules (tmdt = trimethylenetetrathiafulvalenedithiolate) were performed by using a sensitive microcantilever at low temperatures in high magnetic fields to 45 T. The observed signals for all directions of magnetic field revealed unambiguously the presence of three-dimensional Fermi surfaces for both holes and electrons. The results are consistent with electronic band structure calculations for [Ni(tmdt)2].
Nanotechnology Research Institute, AIST, Tsukuba, Ibaraki 305-8568, Japan.
Hisashi
H
Tanaka
Madoka
M
Tokumoto
Shoji
S
Ishibashi
David
D
Graf
Eun Sang
ES
Choi
James S
JS
Brooks
Syuma
S
Yasuzuka
Yoshinori
Y
Okano
Hayao
H
Kobayashi
Akiko
A
Kobayashi