The Sarma state is a superconducting state which exists at a high magnetic

field and has an electronic structure more similar to a normal metal. Although

normally an unstable thermodynamic state, the Sarma state has

been predicted to occur in multiband superconductors with sufficient gap

anisotropy. In nonsymmorphic systems, strongly spin-orbit coupled electrons

and weakly spin-orbit coupled electrons can coexist. The strongly

spin-coupled electrons experience a weak Zeeman effect for a magnetic

field and weakly spin-coupled electrons experience a normal magnitude

of the Zeeman effect. The different strengths of the Zeeman effect on the

two Fermi surfaces allow the Sarma state to occur.

The aim of this project is to use mean-field theory to obtain the magnetic

field-temperature phase diagram for a superconductor with nonsymmorphic

structure and to determine the existence of the Sarma state. Furthermore,

we study the variation of thermodynamic quantities such as specific heat,

magnetization and susceptibility across the phase diagram to find evidence

for the Sarma state.