Why does my 2d player stick to the floor when he lands?

Hey guys,

I am running into a bug in my 2d platformer. Whenever my player lands from a jump, he pauses for a moment before he continues to move. The only time it doesn't happen is when I set the physics material for the ground or player to 0 friction, but when I do that my player slides as if on ice. Could someone take a look at my character movement script and let me know what I am doing wrong?

 using UnityEngine;
 using System.Collections;
 
 public class CharacterMovement : MonoBehaviour {
 
     public Transform groundCheck;
     public LayerMask whatIsGround;
     float jumpForce = 800.0f;
     float moveForce = 50.0f;
     float maxSpeed = 8.0f;
     bool onGround = false;
     bool jump = false;
     float groundRadius = 0.2f;
 
 
     // Use this for initialization
     void Start () {
 
     }
 
     // Update is called once per frame
     void Update () {
 
         // Check for ground
         onGround = Physics2D.OverlapCircle (groundCheck.position, groundRadius, whatIsGround);
 
         if (Input.GetKeyDown ("space") && onGround) {
             jump = true;        
         }
     }
 
     void FixedUpdate () {
 
         // Set movement speed
 
         float inputRate = Input.GetAxisRaw ("Horizontal");
 
         // Move player
         if (inputRate * rigidbody2D.velocity.x < maxSpeed) {
             rigidbody2D.AddForce (Vector2.right * inputRate * moveForce);
         }
         
         if (Mathf.Abs(rigidbody2D.velocity.x) > maxSpeed) {
             rigidbody2D.velocity = new Vector2 (Mathf.Sign (rigidbody2D.velocity.x) * maxSpeed, rigidbody2D.velocity.y);
         }
 
         // Jump
         if (jump){
             rigidbody2D.AddForce(new Vector2(rigidbody2D.velocity.x, jumpForce));
             jump = false;
         }
     }
 }