CQMS special seminar by Dr.Park(POSTECH)

EPSL | 2013.12.11 11:10 | 조회 6872
Dr.Park(POSTECH)  will give a special seminar.

We would like to invite physics students to attend the seminar.

 

        < Information>

 

     1. Date and time : 2013/12/13(Fri) 15:00

 

     2. Place : 31355 Department of Physics seminar roomNatural science 1

 

     3. Invited speaker : Dr.Park (POSTECH)

 

    4. Title : Magnetism, Superconductivity and Quantum Criticality


     5. Abstract : 

 

      Since the Onnes's discovery of superconductivity in April 1911, it had taden nearly half a century before Bardeen, Cooper and Schrieffer formulated a comprehensive microscopic description of classical superconductivity, called the BCS mechanism. After the mechanism was proposed, however, there has been unconventioanl supercontivity including the heavy-fermion systems, high-temperature superconducting cuprates and iron-based materials. The microscopic mechanisms of such unconventional superconductors have been still hotly debated at present. In this short talk, I present towards new paradigm of magnetism, superconcuctivity and quantum criticality after reviewing matal, isulator and superconductors briefly. The unconventional superconductors have provided much interest in trying to fathom how magnetism and superconductivity interwine or collude to construct a unconventional superconducting phase or quantum criticality. Quantum phase transitions arise in many-body systems becasue of competing interactions between two rivaling ground states among a plethora of quantum phases. Quantum criticality has given rise to profound insights into the electronic, magnetic, and superconducting properties of nontrivial metals such as bad and strange metals. In my presentation, I will cover these nontrivial properties on modern superconductors including pseudogaps and unconventional charge density waves observed recently as well as will describe a U(1)×SU(2) gauge theory as a unified pecture of superconducting and pseudogap phases on half a hour talk in brief.

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