Log4j2 - Program doesn't log when replacing Log4j2 imports by slf4j ones - log4j2

Question

My programs stops log in files just by replacing:
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
with
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
I'm using : OracleJdk8, log4j-core-2.17.1 and slf4j-sample-2.0.0-alpha6
Please find bellow my log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Properties>
<Property name="log-path">C:/path/to/logfile</Property>
</Properties>
<Appenders>
<Console name="console-log" target="SYSTEM_OUT">
<PatternLayout pattern="[%-5level] %d{dd/MM/yyyy HH:mm:ss.SSS} [%t] %c{1} - %msg%n" />
</Console>
<RollingFile name="functional-log" fileName="${log-path}/functional.log" filePattern="${log-path}/functional-%d{yyyy-MM-dd}.log">
<PatternLayout>
<pattern>[%-5level] %d{dd/MM/yyyy HH:mm:ss.SSS} [%t] %c{1} - %msg%n
</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true" />
</Policies>
<LevelRangeFilter minLevel="INFO" maxLevel="INFO" onMatch="ACCEPT" onMismatch="DENY" />
</RollingFile>
<RollingFile name="technical-1-log" fileName="${log-path}/technical.log" filePattern="${log-path}/technical-%d{yyyy-MM-dd}.log">
<PatternLayout>
<pattern>[%-5level] %d{dd/MM/yyyy HH:mm:ss.SSS} [%t] %c{1} - %msg%n
</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true" />
</Policies>
<LevelRangeFilter minLevel="DEBUG" maxLevel="TRACE" onMatch="ACCEPT" onMismatch="DENY" />
</RollingFile>
<RollingFile name="technical-2-log" fileName="${log-path}/technical.log" filePattern="${log-path}/technical-%d{yyyy-MM-dd}.log">
<PatternLayout>
<pattern>[%-5level] %d{dd/MM/yyyy HH:mm:ss.SSS} [%t] %c{1} - %msg%n
</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true" />
</Policies>
<LevelRangeFilter minLevel="WARN" maxLevel="WARN" onMatch="ACCEPT" onMismatch="DENY" />
</RollingFile>
<RollingFile name="error-log" fileName="${log-path}/error.log" filePattern="${log-path}/error-%d{yyyy-MM-dd}.err">
<PatternLayout>
<pattern>[%-5level] %d{dd/MM/yyyy HH:mm:ss.SSS} [%t] %c{1} - %msg%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true" />
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Logger name="x.y.z" level="ALL" additivity="false">
<appender-ref ref="console-log" level="ALL" />
<appender-ref ref="functional-log" level="INFO" />
<appender-ref ref="technical-1-log" level="TRACE" />
<appender-ref ref="technical-2-log" level="WARN" />
<appender-ref ref="error-log" level="ERROR" />
</Logger>
<Root level="TRACE" additivity="false">
<AppenderRef ref="console-log" />
</Root>
</Loggers>
</Configuration>
By this configuration, I'd like to log :
"ERROR" and "FATAL" in error.err file.
"TRACE", "DEBUG" and "WARN" in technical.log file.
"INFO" in functional.log file.
Could you please indicate me the right way to use slf4j import to still logging in RollingFile?
Knowing that org.slf4j.Logger.fatal() method doesn't exist :(
Thank you so much for you help!