A new method to study the Hawking radiation of the charged black hole with a global monopole

Applying Hamilton-Jacobi method, we investigate the tunneling characteristic of the charged black hole with a global monopole by taking the self-gravitational interaction as well as the energy conservation and charge conservation into account. The radiation spectrum deviates from the purely thermal one and the tunneling probability is related to the change of Bekenstein-Hawking entropy. The result satisfies an underlying unitary theory and gives a correction to the Hawking radiation. (authors)