Wordpress only load after contents using ajax

My wordpress home page posts are like this

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<!--more-->    
Investigationes demonstraverunt<strong> lectores legere</strong> 
me lius quod ii legunt saepius. Claritas est

I shows post content before tag on my home page, and trying to load after contents separately via ajax, i wrote some codes but it restuns full post, but i only need to retu after part of

ex

Investigationes demonstraverunt<strong> lectores legere</strong> 
    me lius quod ii legunt saepius. Claritas est

only this part my code for get contents via ajax is

<div id="single-post post-<?php the_ID(); ?>">
         <?php while (have_posts()) : the_post(); ?>
                <?php the_content();?>
    <?php endwhile;?>      
    </div>

this give full post anyone know how to get only contents after the Thank You