Kee, Hae-Young, Doh, Hyeonjin, Grzesiak, Thomas
This paper consists of two important theoretical observations on the interplay between l = 2 condensates; d-density wave (ddw), electronic nematic and d-wave superconducting states. (1) There is...
Meta-nematic transitions in a bilayer system: Application to the bilayer ruthenate (2007)
Puetter, Christoph, Doh, Hyeonjin, Kee, Hae-Young
It was suggested that the two consecutive metamagnetic transitions and the large residual resistivity discovered in Sr$_3$Ru$_2$O$_7$ can be understood via the nematic order and its domains in a...
An electronic nematic state spontaneously breaks a point-group symmetry of an underlying lattice. As a result, the nematic-isotropic transition accompanies a Fermi surface distortion. However, the...
Lee, Nayoung, Choi, Han-Yong, Doh, Hyeonjin, Char, K., Lee, Hyun-Woo
We calculate the superconducting critical temperature $T_c$, the singlet pair function $\Psi^+(x)$, and triplet pair function $\Psi^-(x)$ of superconductor/normal metal/ferromagnet (S/N/F) trilayers...
A novel route to a finite center-of-mass momentum pairing state; current driven FFLO state (2006)
Doh, Hyeonjin, Song, Matthew, Kee, Hae-Young
The previously studied Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is stabilized by a magnetic field via the Zeeman coupling in spin-singlet superconductors. Here we suggest a novel route to...
Nematic domains and resistivity in an itinerant metamagnet coupled to a lattice (2006)
Doh, Hyeonjin, Kim, Yong Baek, Ahn, K. H.
The nature of the emergent phase near a putative quantum critical point in the bilayer ruthenate Sr$_3$Ru$_2$O$_7$ has been a recent subject of intensive research. It has been suggested that this...
Interplay between parallel and diagonal electronic nematic phases in interacting systems (2006)
Doh, Hyeonjin, Friedman, Nir, Kee, Hae-Young
An electronic nematic phase can be classified by a spontaneously broken discrete rotational symmetry of a host lattice. In a square lattice, there are two distinct nematic phases. The parallel...
Kim, Jinho, Kwon, Jun Hyung, Char, K., Doh, Hyeonjin, Choi, Han-Yong
We have studied the behavior of the superconducting critical temperature Tc in $Nb/Co_{60}Fe_{40}$, Nb/Ni, and $Nb/Cu_{40}Ni_{60}$ bilayers as a function of the thickness of each ferromagnetic metal...
Proximity Effect in Nb/Au/CoFe Trilayers (2005)
Kim, Jinho, Doh, Yong-Joo, Char, K., Doh, Hyeonjin, Choi, Han-Yong
We have investigated the superconducting critical temperatures of Nb/Au/CoFe trilayers as a function of Au and CoFe thicknesses. Without the CoFe layer the superconducting critical temperatures of...
The superconducting critical temperature $T_C$ of a superconductor/ferromagnet (S/F) bilayer with spin-flip scatterings at the interface is calculated as a function of the ferromagnet thickness $d_F$...
Phenomenological Theory of Superconductivity and Magnetism in Ho$_{1-x}$Dy$_x$Ni$_2$B$_2$C (1999)
Doh, Hyeonjin, Sigrist, Manfred, Cho, B. K., Lee, Sung-Ik
The coexistence of the superconductivity and magnetism in the Ho$_{1-x}$Dy$_x$Ni$_2$B$_2$C is studied by using Ginzburg-Landau theory. This alloy shows the coexistence and complex interplay of...
Hong, Seung-Pyo, Doh, Hyeonjin, Salk, Sung-Ho Suck
Considering interacting (antiferromagnetically correlated) electrons, we derive a generalized Harper's equation for the square lattice of infinite size. We obtain an analytic expression for the...
Effects of Electron Correlations on Hofstadter Spectrum (1997)
Doh, Hyeonjin, Hong, Seung-Pyo, Salk, Sung-Ho Suck
By allowing interactions between electrons, a new Harper's equation is derived to examine the effects of electron correlations on the Hofstadter energy spectra. It is shown that the structure of the...
Doh, Hyeonjin, Salk, Sung-Ho Suck
Using the Hubbard model Hamiltonian in a mean field level, we examine the variation of antiferromagnetic strength with applied magnetic field. It is demonstrated that minima in the antiferromagnetic...