materializecss time picker is not working but datapicker is working please help

i have integrated time picker and date picker in my html but . my time picker is not working . I don't know where i am going wrong.

<script type="text/javascript" src="{{asset('js/plugins/jquery-1.11.2.min.js')}}"></script>
<div class="input-field col s12 m4 l4">
                          <i class="mdi-image-timer prefix"></i>
                           <input type="text" class="timepicker picker__input picker__input--active validate">
                          <label for="tob">Time of birth</label>
                        </div>

<script>
 $(document).ready(function(){
    $('.timepicker').timepicker({});
});
</script>