3.3.3.94. NXstm

Status:

application definition (contribution), extends NXspm

Description:

An application definition to describe Scanning Tunneling Microscopy (STM).

Symbols:

No symbol table

Groups cited:

NXcollection, NXentry, NXenvironment, NXinstrument, NXlockin, NXsensor, NXspm_scan_control

Structure:

ENTRY: (required) NXentry ⤆

definition: (required) NX_CHAR ⤆

Name of the definition that is used for the STM technique. ...

Name of the definition that is used for the STM technique.

Obligatory value: NXstm

scan_mode: (required) NX_CHAR ⤆

The mode of the scan that is performed. Two commonly used modes are constan ...

The mode of the scan that is performed. Two commonly used modes are constant height mode and constant current mode.

Any of these values: constant height | constant current

experiment_technique: (required) NX_CHAR ⤆

The specific to STM experiment. ...

The specific to STM experiment.

Obligatory value: STM

INSTRUMENT: (required) NXinstrument ⤆

lockin_amplifier: (required) NXlockin ⤆

The lock-in amplifier information. The device is being used to extract ...

The lock-in amplifier information. The device is being used to extract the very weak signal buried in noisy signals.

modulation_signal: (recommended) NX_CHAR {units=NX_UNITLESS} ⤆

The type of the signal (voltage or current) subject to modulation.

SCAN_ENVIRONMENT: (required) NXenvironment ⤆

The environment information for stm or sts experiment. ...

The environment information for stm or sts experiment.

Note: At least one field from head_temperature, cryo_bottom_temperature and cryo_shield_temperature must be provided.

lockin_status: (recommended) NX_BOOLEAN

The status of the lock-in amplifier. It is well established convention t ...

The status of the lock-in amplifier. It is well established convention that for topographic measurements lockin amplifier is turned off state while current scan lockin amplifier is turned on.

SPM_SCAN_CONTROL: (required) NXspm_scan_control ⤆

The scan control information like scan region or phase space, e.g. patte ...

The scan control information like scan region or phase space, e.g. pattern of scan (e.g. mesh), scanner speed, etc.

head_temperature_sensor: (optional) NXsensor ⤆

This should be a link to ...

This should be a link to /entry/instrument/head_temperature_sensor

cryo_bottom_temperature_sensor: (optional) NXsensor ⤆

This should be a link to ...

This should be a link to /entry/instrument/cryo_bottom_temperature_sensor

cryo_shield_temperature_sensor: (optional) NXsensor ⤆

This should be a link to ...

This should be a link to /entry/instrument/cryo_shield_temperature_sensor

bias_spectroscopy_environment: (optional) NXenvironment ⤆

To explain bias and current behavior (sweep measurement) due to voltage ...

To explain bias and current behavior (sweep measurement) due to voltage applied to the sample.

reproducibility_indicators: (optional) NXcollection ⤆

The group's concepts hold the link to the related concepts that define the ...

The group’s concepts hold the link to the related concepts that define the reproducibility of the STM experiment.

current: (optional) NX_NUMBER

The tunneling current between tip and sample after application of bias vol ...

The tunneling current between tip and sample after application of bias voltage. This should be a link to /entry/instrument/current_sensor/current

current_offset: (optional) NX_NUMBER

The offset in tunneling current between tip and sample after application o ...

The offset in tunneling current between tip and sample after application of bias voltage. This should be a link to /entry/instrument/current_sensor/current_offset

modulation_signal_type: (optional) NX_CHAR ⤆

This is the signal on which the modulation voltage or current will be adde ...

This is the signal on which the modulation voltage or current will be added. This should be a link to /entry/instrument/phase_lock_loop/modulation_signal

reference_frequency: (optional) NX_NUMBER

The frequency of the sine modulation that is used as a carrier signal of i ...

The frequency of the sine modulation that is used as a carrier signal of input signal in lock-in.

This should be a link to /entry/instrument/lockin_amplifier/reference_frequency

BIAS_SWEEP: (optional) NXspm_scan_control

Bias sweep measurement in bias spectroscopy. ...

Bias sweep measurement in bias spectroscopy. This should be a link to /entry/instrument/bias_spectroscopy_environment/bias_spectroscopy/bias_sweep

resolution_indicators: (optional) NXcollection ⤆

The group's concepts hold the link to the related concepts that define the ...

The group’s concepts hold the link to the related concepts that define the resolution of the STM experiment.

head_temperature: (optional) NX_NUMBER

This should be a link to ...

This should be a link to /entry/instrument/scan_environment/head_temperature

cryo_bottom_temperature: (optional) NX_NUMBER

This should be a link to ...

This should be a link to /entry/instrument/scan_environment/cryo_bottom_temperature

cryo_shield_temperature: (optional) NX_NUMBER

This should be a link to ...

This should be a link to /entry/instrument/scan_environment/cryo_shield_temperature

modulation_signal_type: (optional) NX_CHAR ⤆

This is the signal on which the modulation voltage or current will be adde ...

This is the signal on which the modulation voltage or current will be added. This should be a link to /entry/instrument/lockin_amplifier/modulation_signal_type

reference_frequency: (optional) NX_NUMBER

The frequency of the sine modulation that is used to modulate the signal i ...

The frequency of the sine modulation that is used to modulate the signal in lock-in. This should be a link to /entry/instrument/lockin_amplifier/reference_frequency

BIAS_SWEEP: (optional) NXspm_scan_control

This should be a link to ...

This should be a link to /entry/instrument/bias_spectroscopy_environment/bias_spectroscopy/bias_sweep

Hypertext Anchors

List of hypertext anchors for all groups, fields, attributes, and links defined in this class.

NXDL Source:

https://github.com/nexusformat/definitions/blob/main/contributed_definitions/NXstm.nxdl.xml