Hall Effect characterisation
Let’s start with a double gated Hall bar. The two gates are connected to a keithley 2600 series sourcemeter. We source a current with a lock-in MFLI (say, id 4400, and we measure the longitudinal resistance with the same lock-in, and the Hall resistance with another one, say 4401. The magnet is an Oxford Instruments triton.
Initialisation
import mesoscopy
mesoscopy.init_db('../database_hallbar.db')
exp = mesoscopy.create_exp(
experiment_name='Hall bar gate dependence',
sample_name='test sample'
)
station = mesoscopy.init_station(
'4400', '4401',
SMU_addr='TCPIP::192.168.0.1::inst0::INSTR',
triton_addr='192.168.0.2'
)
mesoscopy.init_smu(
station,
limits_v=[16,48],
max_rate=[.08,.12]
)
mesoscopy.init_lockin(
station,
freq=117,
ampl=1,
filterorder=8)